javascript - 如何通过jQuery显示以前隐藏的HtmlTableRow？

标签 javascript c# jquery html-table htmltable-control

我有一个带有四行的HtmlTable。始终显示前两个(“列标题”行和常规数据行)。如果用户选择“+”按钮，则应添加另一个按钮，然后添加另一个按钮(最多四行)。

这两个“休眠”行是用C#创建的，但最初通过将它们的高度设置为0来“隐藏”(无论如何，这是有目的的):

boxIndex2 = new TextBox()
{
    CssClass = "finaff-webform-field-input",
    Width = TEXTBOX_WIDTH,
    Height = 0,
    ID = "boxIndex2foapalrow3"
};
cellColIndex2.Controls.Add(boxIndex2);

注意:这只是HtmlTableRow中的六个“文本框”之一；它们的高度都设置为0。

这部分起作用:

如您所见，第三和第四行很短，但不是不可见/隐藏的。点击“+”按钮可以使他们达到最大高度:

...然后再次选择“+”按钮“使”最后缩短的行“膨胀”:

我为此使用的jQuery是:
$(document).on("click", '[id$=btnAddFoapalRow]', function (e) {
    var textboxHeight = 15;
    if ($('[id$=boxIndex2foapalrow3]').height() === 0) {
        $('[id$=boxIndex2foapalrow3').height(textboxHeight);
        $('[id$=boxFund2foapalrow3').height(textboxHeight);
        $('[id$=boxOrg2foapalrow3').height(textboxHeight);
        $('[id$=boxAccount2foapalrow3').height(textboxHeight);
        $('[id$=boxActivity2foapalrow3').height(textboxHeight);
        $('[id$=boxAmount2foapalrow3').height(textboxHeight);
    }
    else if ($('[id$=boxIndex3foapalrow4]').height() === 0) {
        $('[id$=boxIndex3foapalrow4').height(textboxHeight);
        $('[id$=boxFund3foapalrow4').height(textboxHeight);
        $('[id$=boxOrg3foapalrow4').height(textboxHeight);
        $('[id$=boxAccount3foapalrow4').height(textboxHeight);
        $('[id$=boxActivity3foapalrow4').height(textboxHeight);
        $('[id$=boxAmount3foapalrow4').height(textboxHeight);
    }
});

因此，在选择“添加一行”(“+”)按钮之前，如何使这些行根本不显示？

我已经尽力使Web部件上的两行“开始生活”变得不可见，然后以编程方式使它们可视化。

我试过了:

将其可见属性设置为false(C#代码隐藏)，然后使用各种客户端/ jQuery代码使它们显示。我尝试了以下jQuery(JavaScript？)方法:
.toggle()
.show()
.slidedown()

...像这样:
/* This is supposed to make the rows visible, but is not yet working... */
$(document).on("click", '[id$=btnAddFoapalRow]', function (e) {
    if ($('[id$=foapalrow3]').not(":visible")) {
        alert('reached the foapalrow3 not visible branch');
        //$('[id$=foapalrow3]').slideDown();
        //$('[id$=foapalrow3]').toggle();
        $('[id$=foapalrow3]').show();
    }
    else if ($('[id$=foapalrow4]').not(":visible")) {
        alert('reached the foapalrow4 not visible branch');
        $('[id$=foapalrow4]').slideDown();
    }
});

...但是这些都不起作用。我确实看到了“到达foapalrow3不可见的分支”警报的代码。

因此，我是否需要走一条完全不同的道路，例如使这些单独的单行表并使表可见？也就是说，单击“+”按钮使带有第二个数据行(总第三行)的表可见，再次单击该按钮使第三个数据行(总第四行)的表可见？或如何？

更新

在jmoreno的请求/建议下，这是HTML，如通过“查看源代码”看到的:
<button id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_btnAddFoapalRow" type="button">+</button>
    <table border="2">
        <tr>
            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label">Index</span></td>
            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label" style="text-align:center;">Fund</span></td>
            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label" style="text-align:center;">Organization</span></td>
            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label" style="text-align:center;">Account</span></td>
            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label" style="text-align:center;">Activity</span></td>
            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label" style="text-align:center;">Amount</span></td>
        </tr>
        <tr>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl130" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl132" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl134" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl136" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl138" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl140" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
        </tr>
        <tr id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_foapalrow3">
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxIndex2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxIndex2foapalrow3" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxFund2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxFund2foapalrow3" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
             <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxOrg2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxOrg2foapalrow3" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
             <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxAccount2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxAccount2foapalrow3" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
             <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxActivity2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxActivity2foapalrow3" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxAmount2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxAmount2foapalrow3" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
        </tr>
        <tr id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_foapalrow4">
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxIndex3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxIndex3foapalrow4" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxFund3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxFund3foapalrow4" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxOrg3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxOrg3foapalrow4" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxAccount3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxAccount3foapalrow4" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxActivity3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxActivity3foapalrow4" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxAmount3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxAmount3foapalrow4" class="dplatypus-webform-field-input" style="height:0px;width:88px;" /></td>
        </tr>
    </table>

...这就是在服务器端C#中创建的所有内容(HtmlTable及其行，单元格和内容):
private void GenerateSection5()
{
    HtmlTable tblSection5 = null;

    var headerLabel = new Label
    {
        CssClass = "dplatypus-webform-field-label",
        Text = "<h2>FOAPAL / Payment Amount Information</h2>"
    };
    this.Controls.Add(headerLabel);

    AddVerticalSpace();

    tblSection5 = GetSection5Table();
    if (null != tblSection5)
    {
        this.Controls.Add(tblSection5);
    }

    AddVerticalSpace();
    var totalLabel = new Label
    {
        CssClass = "dplatypus-webform-field-label",
        Text = "Total: "
    };
    this.Controls.Add(totalLabel);
    boxSection5Total = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input"
    };
    this.Controls.Add(boxSection5Total);

    AddVerticalSpace();
}

private HtmlTable GetSection5Table()
{
    const int TEXTBOX_WIDTH = 88;
    const String CELL_WIDTH = "88px";
    foapalHTMLTable = new HtmlTable();
    foapalHTMLTable.Border = 2;

    // Create Row 1
    var row1 = new HtmlTableRow();

    var cellColTitle1 = new HtmlTableCell();
    cellColTitle1.Width = CELL_WIDTH;
    cellColTitle1.Style.Add("text-align", "center");
    row1.Cells.Add(cellColTitle1);
    var cellColTitle2 = new HtmlTableCell();
    cellColTitle2.Width = CELL_WIDTH;
    cellColTitle2.Style.Add("text-align", "center");
    row1.Cells.Add(cellColTitle2);
    var cellColTitle3 = new HtmlTableCell();
    cellColTitle3.Width = CELL_WIDTH;
    cellColTitle3.Style.Add("text-align", "center");
    row1.Cells.Add(cellColTitle3);
    var cellColTitle4 = new HtmlTableCell();
    cellColTitle4.Width = CELL_WIDTH;
    cellColTitle4.Style.Add("text-align", "center");
    row1.Cells.Add(cellColTitle4);
    var cellColTitle5 = new HtmlTableCell();
    cellColTitle5.Width = CELL_WIDTH;
    cellColTitle5.Style.Add("text-align", "center");
    row1.Cells.Add(cellColTitle5);
    var cellColTitle6 = new HtmlTableCell();
    cellColTitle6.Width = CELL_WIDTH;
    cellColTitle6.Style.Add("text-align", "center");
    row1.Cells.Add(cellColTitle6);

    var indexStr = new Label
    {
        CssClass = "dplatypus-webform-field-label",
        Text = "Index"
    };
    cellColTitle1.Controls.Add(indexStr);
    var fundStr = new Label
    {
        CssClass = "dplatypus-webform-field-label",
        Text = "Fund"
    };
    fundStr.Style.Add("text-align", "center");
    cellColTitle2.Controls.Add(fundStr);
    var orgStr = new Label
    {
        CssClass = "dplatypus-webform-field-label",
        Text = "Organization"
    };
    orgStr.Style.Add("text-align", "center");
    cellColTitle3.Controls.Add(orgStr);
    var accountStr = new Label
    {
        CssClass = "dplatypus-webform-field-label",
        Text = "Account"
    };
    accountStr.Style.Add("text-align", "center");
    cellColTitle4.Controls.Add(accountStr);
    var activityStr = new Label
    {
        CssClass = "dplatypus-webform-field-label",
        Text = "Activity"
    };
    activityStr.Style.Add("text-align", "center");
    cellColTitle5.Controls.Add(activityStr);
    var amountStr = new Label
    {
        CssClass = "dplatypus-webform-field-label",
        Text = "Amount"
    };
    amountStr.Style.Add("text-align", "center");
    cellColTitle6.Controls.Add(amountStr);
    foapalHTMLTable.Rows.Add(row1);

    btnAddFoapalRow = new HtmlButton();
    btnAddFoapalRow.Attributes["type"] = "button";
    btnAddFoapalRow.InnerHtml = "+"; 
    btnAddFoapalRow.ID = "btnAddFoapalRow";
    this.Controls.Add(btnAddFoapalRow);

    // Create row 2
    foapalrow2 = new HtmlTableRow();

    var cellColIndex1 = new HtmlTableCell();
    cellColIndex1.Width = CELL_WIDTH;
    foapalrow2.Cells.Add(cellColIndex1);
    var cellColFund1 = new HtmlTableCell();
    cellColFund1.Width = CELL_WIDTH;
    foapalrow2.Cells.Add(cellColFund1);
    var cellColOrg1 = new HtmlTableCell();
    cellColOrg1.Width = CELL_WIDTH;
    foapalrow2.Cells.Add(cellColOrg1);
    var cellColAccount1 = new HtmlTableCell();
    cellColAccount1.Width = CELL_WIDTH;
    foapalrow2.Cells.Add(cellColAccount1);
    var cellColActivity1 = new HtmlTableCell();
    cellColActivity1.Width = CELL_WIDTH;
    foapalrow2.Cells.Add(cellColActivity1);
    var cellColAmount1 = new HtmlTableCell();
    cellColAmount1.Width = CELL_WIDTH;
    foapalrow2.Cells.Add(cellColAmount1);

    boxIndex1 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH
    };
    cellColIndex1.Controls.Add(boxIndex1);
    boxFund1 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH
    };
    cellColFund1.Controls.Add(boxFund1);
    boxOrganization1 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH
    };
    cellColOrg1.Controls.Add(boxOrganization1);
    boxAccount1 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH
    };
    cellColAccount1.Controls.Add(boxAccount1);
    boxActivity1 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH
    };
    cellColActivity1.Controls.Add(boxActivity1);
    boxAmount1 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH
    };
    cellColAmount1.Controls.Add(boxAmount1);

    foapalHTMLTable.Rows.Add(foapalrow2);

    // Row 3
    foapalrow3 = new HtmlTableRow();
    foapalrow3.ID = "foapalrow3";

    var cellColIndex2 = new HtmlTableCell();
    cellColIndex2.Width = CELL_WIDTH;
    foapalrow3.Cells.Add(cellColIndex2);
    var cellColFund2 = new HtmlTableCell();
    cellColFund2.Width = CELL_WIDTH;
    foapalrow3.Cells.Add(cellColFund2);
    var cellColOrg2 = new HtmlTableCell();
    cellColOrg2.Width = CELL_WIDTH;
    foapalrow3.Cells.Add(cellColOrg2);
    var cellColAccount2 = new HtmlTableCell();
    cellColAccount2.Width = CELL_WIDTH;
    foapalrow3.Cells.Add(cellColAccount2);
    var cellColActivity2 = new HtmlTableCell();
    cellColActivity2.Width = CELL_WIDTH;
    foapalrow3.Cells.Add(cellColActivity2);
    var cellColAmount2 = new HtmlTableCell();
    cellColAmount2.Width = CELL_WIDTH;
    foapalrow3.Cells.Add(cellColAmount2);

    boxIndex2 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH,
        Height = 0,
        ID = "boxIndex2foapalrow3"
    };
    cellColIndex2.Controls.Add(boxIndex2);

    boxFund2 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH,
        Height = 0,
        ID = "boxFund2foapalrow3"
    };
    cellColFund2.Controls.Add(boxFund2);

    boxOrganization2 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH,
        Height = 0,
        ID = "boxOrg2foapalrow3"
    };
    cellColOrg2.Controls.Add(boxOrganization2);

    boxAccount2 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH,
        Height = 0,
        ID = "boxAccount2foapalrow3"
    };
    cellColAccount2.Controls.Add(boxAccount2);

    boxActivity2 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH,
        Height = 0,
        //Visible = false, <= this does work
        ID = "boxActivity2foapalrow3"
    };
    cellColActivity2.Controls.Add(boxActivity2);

    boxAmount2 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH,
        Height = 0,
        ID = "boxAmount2foapalrow3"
    };
    cellColAmount2.Controls.Add(boxAmount2);
    foapalHTMLTable.Rows.Add(foapalrow3);

    // Row 4
    foapalrow4 = new HtmlTableRow();
    foapalrow4.ID = "foapalrow4";

    var cellColIndex3 = new HtmlTableCell();
    cellColIndex3.Width = CELL_WIDTH;
    foapalrow4.Cells.Add(cellColIndex3);
    var cellColFund3 = new HtmlTableCell();
    cellColFund3.Width = CELL_WIDTH;
    foapalrow4.Cells.Add(cellColFund3);
    var cellColOrg3 = new HtmlTableCell();
    cellColOrg3.Width = CELL_WIDTH;
    foapalrow4.Cells.Add(cellColOrg3);
    var cellColAccount3 = new HtmlTableCell();
    cellColAccount3.Width = CELL_WIDTH;
    foapalrow4.Cells.Add(cellColAccount3);
    var cellColActivity3 = new HtmlTableCell();
    cellColActivity3.Width = CELL_WIDTH;
    foapalrow4.Cells.Add(cellColActivity3);
    var cellColAmount3 = new HtmlTableCell();
    cellColAmount3.Width = CELL_WIDTH;
    foapalrow4.Cells.Add(cellColAmount3);

    boxIndex3 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Height = 0,
        Width = TEXTBOX_WIDTH,
        ID = "boxIndex3foapalrow4"
    };
    cellColIndex3.Controls.Add(boxIndex3);

    boxFund3 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH,
        Height = 0,
        ID = "boxFund3foapalrow4"
    };
    cellColFund3.Controls.Add(boxFund3);

    boxOrganization3 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH,
        Height = 0,
        ID = "boxOrg3foapalrow4"
    };
    cellColOrg3.Controls.Add(boxOrganization3);

    boxAccount3 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH,
        Height = 0,
        ID = "boxAccount3foapalrow4"
    };
    cellColAccount3.Controls.Add(boxAccount3);

    boxActivity3 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH,
        Height = 0,
        ID = "boxActivity3foapalrow4"
    };
    cellColActivity3.Controls.Add(boxActivity3);

    boxAmount3 = new TextBox()
    {
        CssClass = "dplatypus-webform-field-input",
        Width = TEXTBOX_WIDTH,
        Height = 0,
        ID = "boxAmount3foapalrow4"
    };
    cellColAmount3.Controls.Add(boxAmount3);

    foapalHTMLTable.Rows.Add(foapalrow4);

    // Add more rows if necessary (up to 6, if that's the limit? Or create a method that will add another one, no matter how many are required)

    return foapalHTMLTable;
}

更新2

@Jon P:正如您在可运行示例中所看到的那样，您的代码肯定且可运行。但是，我的实现仍然无法正常工作。我将此代码添加到了项目的* .ascx文件中。

的CSS
<style>
/* Hide the FOAPAL rows */
.inputTable tr:nth-child(n + 3) {display:none;} 
/* Standardize input width */
.inputTable input[type="text"] {width: 88px;}
</style>

jQuery的
$(".expander").click(function () {
    alert("expander click entered - remove this alert after seeing it");
    $('.inputTable').find('tr:hidden:first').show();
});

但是，尽管我将类(“扩展程序”)添加到“+”按钮中，但单击按钮时却看不到警报，如下所示:

C#
btnAddFoapalRow = new HtmlButton();
btnAddFoapalRow.Attributes["type"] = "button";
btnAddFoapalRow.InnerHtml = "+"; 
btnAddFoapalRow.ID = "btnAddFoapalRow";
btnAddFoapalRow.Attributes["class"] = "expander"; // <= This is how to do it, right?

因此，我添加了以下内容:
$(document).on("click", '[id$=btnAddFoapalRow]', function (e) {
    alert("btnAddFoapalRow click entered - remove this alert after seeing it");
    $('.inputTable').find('tr:hidden:first').show();
});

...并将最后两个(第3行和第4行)设置为不可见，如下所示:
foapalrow3.Visible = false;
. . .
foapalrow4.Visible = false;

...但是，尽管我确实只从可见的一行开始，但是在混入“+”按钮时，其他行不会被扩展/添加/可视化；我需要将“display”属性设置为“none”，而不是将visible设置为false，还是...？

注意:我已将表设置为使用“inputTable”类，如下所示:
foapalHTMLTable = new HtmlTable();
foapalHTMLTable.Attributes["class"] = "inputTable";

这两个类都出现在呈现的HTML(“查看源代码”)中，如下所示:
<button id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_btnAddFoapalRow" type="button" class="expander">  
+</button><table border="2" class="inputTable">

...所以我不知道问题是什么。应该添加最后一行(第二行)的文本框，如下所示:
boxAmount1 = new TextBox()
{
    CssClass = "dplatypus-webform-field-input",
    Width = TEXTBOX_WIDTH
};
cellColAmount1.Controls.Add(boxAmount1);

...而那些本应是“不可见的”就像这样(将Height设置为0，这只能部分起作用):
boxIndex2 = new TextBox()
{
    CssClass = "dplatypus-webform-field-input",
    Width = TEXTBOX_WIDTH,
    Height = 0,
    ID = "boxIndex2foapalrow3"
};
cellColIndex2.Controls.Add(boxIndex2);

该表的呈现HTML具有以下优点:
<table border="2" class="inputTable">
                        <tr>
                            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label">Index</span></td>
                            <td width="88px" style="text-align:center;"><span class="dplatypus-
webform-field-label" style="text-align:center;">Fund</span></td>

更新3

尝试通过以下方式纠正问题:
//foapalrow3.Visible = false;
foapalrow3.Attributes["display"] = "none";
. . .
//foapalrow4.Visible = false;
foapalrow4.Attributes["display"] = "none";

...也不起作用(这使我回到表格的原始外观-前两行正常，后两行可见，但“高度受到挑战”)。

更新4

我什至尝试了这个:

(a)在表格中添加一个ID:
foapalHTMLTable.ID = "foapalhtmltable";

(b)找到表格并在将“+”按钮捣碎时对其进行操作:
$(document).on("click", '[id$=btnAddFoapalRow]', function (e) {
    alert("btnAddFoapalRow click entered - remove this alert after seeing it");
    //$('.inputTable').find('tr:hidden:first').show();
    $('[id$=foapalhtmltable]').find('tr:hidden:first').show();
});

...可惜!即使我大概是这样隐藏行:
foapalrow3.Attributes["display"] = "none";
foapalrow4.Attributes["display"] = "none";

...(如前所述)，它仍然不起作用。我是否需要“边界折叠”(请参阅​​o.k.w的答案hyar)？

更新5

我确实注意到，在“查看源代码”中没有针对“foapalrow3”或“foapalrow4”的“display:none”-为什么当我在代码中将其设置为Heckle和Jeckle时却没有:
foapalrow3.Attributes["display"] = "none";
foapalrow4.Attributes["display"] = "none";

？

最佳答案

您可以做所有这些客户端。在整个服务器端构建表，不要对其进行任何处理。

使用CSS隐藏除前2行之外的所有行:

.inputTable tr:nth-child(n + 3) {display:none;}

现在使用jQuery显示第一个隐藏行(我已经习惯使用click了，随时使用on):
$(".expander").click(function(){
    $('.inputTable').find('tr:hidden:first').slideDown();
});

注意我给按钮提供了expander类，并为表提供了inputTable类

使用您的html的示例:

$(".expander").click(function(){
    $('.inputTable').find('tr:hidden:first').show();
});
/* Hide the rows */
.inputTable tr:nth-child(n + 3) {display:none;} 
/* Standardize input width */
.inputTable input[type="text"] {width: 88px;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<button id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_btnAddFoapalRow" type="button" class="expander">+</button>
<table border="2" class="inputTable">
                        <tr>
                            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label">Index</span></td>
                            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label" style="text-align:center;">Fund</span></td>
                            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label" style="text-align:center;">Organization</span></td>
                            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label" style="text-align:center;">Account</span></td>
                            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label" style="text-align:center;">Activity</span></td>
                            <td width="88px" style="text-align:center;"><span class="dplatypus-webform-field-label" style="text-align:center;">Amount</span></td>
                        </tr>
                        <tr>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl130" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl132" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl134" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl136" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl138" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$ctl140" type="text" class="dplatypus-webform-field-input" style="width:88px;" /></td>
                        </tr>
                        <tr id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_foapalrow3">
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxIndex2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxIndex2foapalrow3" class="dplatypus-webform-field-input"  /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxFund2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxFund2foapalrow3" class="dplatypus-webform-field-input"  /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxOrg2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxOrg2foapalrow3" class="dplatypus-webform-field-input"  /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxAccount2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxAccount2foapalrow3" class="dplatypus-webform-field-input" /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxActivity2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxActivity2foapalrow3" class="dplatypus-webform-field-input"  /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxAmount2foapalrow3" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxAmount2foapalrow3" class="dplatypus-webform-field-input"  /></td>
                        </tr>
                        <tr id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_foapalrow4">
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxIndex3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxIndex3foapalrow4" class="dplatypus-webform-field-input" /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxFund3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxFund3foapalrow4" class="dplatypus-webform-field-input"  /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxOrg3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxOrg3foapalrow4" class="dplatypus-webform-field-input"  /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxAccount3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxAccount3foapalrow4" class="dplatypus-webform-field-input"  /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxActivity3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxActivity3foapalrow4" class="dplatypus-webform-field-input"  /></td>
                            <td width="88px"><input name="ctl00$ctl24$g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33$ctl00$boxAmount3foapalrow4" type="text" id="ctl00_ctl24_g_5f3fedca_19f7_4bc3_b84e_efbef0c48a33_ctl00_boxAmount3foapalrow4" class="dplatypus-webform-field-input" /></td>
                        </tr>
                    </table>


奖励:Some CSS nth-child info

更新

将表保留在服务器端，不要尝试在中隐藏任何内容，因此请删除所有foapalrow3.Attributes["display"] = "none";，foapalrow3.visible = false;等。我回答中的CSS会为您隐藏行，因此不需要在服务器端进行任何操作即可隐藏行。

只是仔细检查inputTable作为类添加到表中，而expander作为类添加到按钮中。

添加类的备用版本是
foapalHTMLTable.Attributes.Add("class","inputTable");
foapalrow4.Attributes["display"] = "none";不执行任何操作的原因是因为没有html display属性，您可能希望更改style属性，因为display是CSS样式的一部分。

关于javascript - 如何通过jQuery显示以前隐藏的HtmlTableRow？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/31091241/

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