我在另一个 gridview 中有一个嵌套的 gridview。父 GridView 有一个任务列表，每个任务都有一个步骤列表(子 GridView )。每个步骤都有一个复选框，因此一旦用户完成某个步骤，他就会选中该复选框，这将触发 CheckChanged 事件，其中我有一个存储过程来更新数据库，以便选中的步骤注册为已完成。
我有一个 CheckChanged 事件，它查找选中的复选框所在行的步骤 ID，然后使用该步骤 ID 作为输入参数来触发存储过程。这有效。但是，可以添加步骤，并且由于某种原因，当单击先前步骤上的复选框时，查找步骤 ID 的代码将不会向后并识别该步骤 ID。换句话说，如果某个任务的步骤 ID 为 20，并且它被检查并且事件触发，如果我将一个步骤添加到较早的任务( GridView 上列出的较高任务)并且该步骤具有ID 为 21，单击它会不断将步骤 ID 注册为 20，就好像 CheckChanged 事件无法识别添加到另一个任务的步骤一样。这是我的代码:
aspx:
<asp:GridView ID="GridView1"
DataKeyNames="TaskID"
runat="server"
OnRowDataBound="GridView1_OnRowDataBound"
CssClass="DefaultGrid"
onRowCommand="GridView1_RowCommand"
EmptyDataText = "<br/>There are no Tasks in this Project."
AllowPaging="True"
AllowSorting="True"
CellPadding="4"
DataSourceID="SqlDataSource_mp_Display_Tasks_Home"
ForeColor="#333333"
GridLines="None"
AutoGenerateColumns="False">
<AlternatingRowStyle BackColor="White" ForeColor="#284775" />
<RowStyle CssClass=" table-responsive body-content " />
<Columns>
<asp:CommandField ShowSelectButton="False" />
<asp:TemplateField>
<ItemTemplate>
<img alt = "" style="cursor: pointer" src="Images/plus.png" />
<asp:Panel ID="pnlOrders" runat="server" Style="display:none">
<asp:GridView ID="GridView2"
runat="server"
onRowCommand="GridView2_RowCommand"
Datakeynames="TaskStepID"
CssClass="ChildGrid"
EmptyDataText="<br/>There are no Steps in this Task."
AutoGenerateColumns="false"
onselectedindexchanged="GridView2_SelectedIndexChanged">
<Columns>
<asp:BoundField DataField="TaskStepID" HeaderText="TaskStepID" Visible="true" />
<asp:BoundField DataField="TaskID" HeaderText="TaskID" Visible="false" />
<asp:BoundField DataField="TaskStepTypeID" HeaderText="TaskStepTypeID" Visible="false"/>
<asp:BoundField DataField="TaskStepPriority" HeaderText="Task Step Priority" Visible="false" />
<asp:BoundField ItemStyle-Width="70%" DataField="TaskStepDesc" HeaderText="Step Description" />
<asp:TemplateField HeaderText="Step Completed" ItemStyle-Width="15%" >
<ItemStyle HorizontalAlign="Center" />
<ItemTemplate>
<asp:Checkbox ID="TaskStepCompleted"
OnCheckedChanged="TaskStepCompleted_CheckedChanged"
Checked='<%# Eval("TaskStepCompleted") %>'
runat="server"
AutoPostBack="true" />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="TaskStepComment" HeaderText="TaskStepComment" Visible="false" />
<asp:TemplateField HeaderText="Step Activity" ItemStyle-Width="15%">
<ItemTemplate>
<asp:LinkButton Text="Add" ID="Addstep" runat="server" CommandName="addstep" CommandArgument='<%# Eval("TaskStepID") %>'/>
<asp:LinkButton Text="Edit" ID="Editstep" runat="server" CommandName="editstep" CommandArgument='<%# Eval("TaskStepID") %>'/>
<asp:LinkButton Text="Delete" ID="Deletestep" runat="server" CommandName="deletestep" OnClientClick="return confirm('<%=AlertMe%>');" CommandArgument='<%# Eval("TaskStepID") %>'/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</asp:Panel>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="TaskID" HeaderText="Task ID" Visible="false"/>
<asp:BoundField DataField="ProjectID" HeaderText="Project ID" Visible="false" />
<asp:BoundField DataField="TaskTypeID" HeaderText="Task Type ID" Visible="false" />
<asp:BoundField DataField="TaskCompleted" HeaderText="Taske Completed?" Visible="false" />
<asp:BoundField DataField="TaskCreationDate" HeaderText="Task Creation Date" Visible="false" />
<asp:BoundField DataField="TaskSubmitterID" HeaderText="Task Submitter ID" Visible="false" />
<asp:BoundField DataField="DepartmentID" HeaderText="DepartmentID" Visible="false" />
<asp:BoundField DataField="TaskDueDateCommentType" HeaderText="Due Date Comment" Visible="false" />
<asp:BoundField DataField="TaskLastUpdatedDate" HeaderText="Task Last Updated Date" Visible="false" />
<asp:BoundField DataField="TaskLastUpdatedUserID" HeaderText="Task Last Updated UserID" Visible="false" />
<asp:BoundField DataField ="TaskSubmitterName" HeaderText="Task Submitter Name" Visible="false" />
<asp:BoundField DataField="TaskLastUpdatedUser" HeaderText="Task Last Updated User" Visible="false" />
<asp:BoundField DataField="DepartmentDesc" HeaderText="Dept" visible="false"/>
<asp:TemplateField HeaderText="Task Description">
<ItemTemplate>
<asp:Label ID="TaskDescription" runat="server" Text='<%# HighlightText(Eval("TaskDescription").ToString()) %>'></asp:Label>
</ItemTemplate>
<ItemStyle Width="40%" />
</asp:TemplateField>
<asp:TemplateField HeaderText="% Comp.">
<ItemStyle HorizontalAlign="Center" />
<ItemTemplate>
<asp:Label ID="PercentCompleted" runat="server" Text='<%# (String.IsNullOrEmpty(Eval("PercentCompleted").ToString()) ? "0" : Eval("PercentCompleted")) + " %" %>' ></asp:Label>
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="TaskDueDate" HeaderStyle-HorizontalAlign="Right" HeaderText="Task Due Date" DataFormatString="{0:MM-dd-yyyy}" visible="true"/>
<asp:BoundField DataField="TaskTypeName" HeaderText="Task Type" visible="true" />
<asp:BoundField DataField="DepartmentAbbrev" HeaderText="Dept" Visible="true" />
<asp:TemplateField HeaderText="Activity">
<ItemTemplate>
<asp:LinkButton Text="Edit" ID="Edittask" runat="server" CommandName="edittask" CommandArgument='<%# Eval("TaskID") %>'/>
<asp:LinkButton Text="Delete" ID="Deletetask" runat="server" CommandName="deletetask" OnClientClick="return confirm('Are you sure you wish to Delete this Task?');" CommandArgument='<%# Eval("TaskID") %>'/>
<asp:LinkButton Text="Comments" ID="Detailstask" runat="server" CommandName="detailstask" CommandArgument='<%# Eval("TaskID") %>'/>
</ItemTemplate>
</asp:TemplateField>
</Columns>
<EditRowStyle BackColor="#999999" />
<FooterStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<HeaderStyle BackColor="#5D7B9D" Font-Bold="True" ForeColor="White" />
<PagerStyle BackColor="#284775" ForeColor="White" HorizontalAlign="Center" />
<RowStyle BackColor="#F7F6F3" ForeColor="#333333" />
<SelectedRowStyle BackColor="#E2DED6" Font-Bold="True" ForeColor="#333333" />
<SortedAscendingCellStyle BackColor="#E9E7E2" />
<SortedAscendingHeaderStyle BackColor="#506C8C" />
<SortedDescendingCellStyle BackColor="#FFFDF8" />
<SortedDescendingHeaderStyle BackColor="#6F8DAE" />
</asp:GridView>
<asp:SqlDataSource ID="SqlDataSource_mp_Display_Tasks_Home" runat="server" FilterExpression="TaskDescription LIKE '%{0}%'" ConnectionString="<%$ ConnectionStrings:IntelliBaseConnectionString_mp_Display_Projects_Home %>" SelectCommand="mp_Display_Tasks_Home" SelectCommandType="StoredProcedure" ProviderName="System.Data.SqlClient">
<SelectParameters>
<asp:Parameter Name="Incoming_ProjectID" Type="Int32" />
</SelectParameters>
<FilterParameters>
<asp:ControlParameter Name="TaskDescription" ControlID="txtSearchtasks" PropertyName="Text"/>
</FilterParameters>
</asp:SqlDataSource>
CS:
protected void TaskStepCompleted_CheckedChanged(object sender, EventArgs e)
{
// this nested foreach grabs the taskstepID number for the row in which the checkbox was just checked.
foreach (GridViewRow row in GridView1.Rows)
{
if (row.RowType == DataControlRowType.DataRow)
{
GridView GridView2 = (GridView)row.FindControl("GridView2");
if (GridView2 != null)
{
foreach (GridViewRow Row in GridView2.Rows)
{
if (Row.RowType == DataControlRowType.DataRow)
{
System.Web.UI.WebControls.CheckBox chk = (System.Web.UI.WebControls.CheckBox)Row.FindControl("TaskStepCompleted");
if (chk.Checked || !chk.Checked)
{
Session["TaskStepID"] = GridView2.DataKeys[Row.RowIndex]["TaskStepID"].ToString();
}
}
}
}
}
}
// autopost back the check box to run the stored procedure
var TaskStepID = Session["TaskStepID"].ToString();
var ProjectID = Session["ProjectID"].ToString();
using (var conn = new SqlConnection("Data Source=orlandosql1;Initial Catalog=IntelliBase;Persist Security Info=True;User ID=trainingsurveys_webuser;Password=C@mb3rSQL;"))
using (SqlCommand cmd = new SqlCommand("dbo.mp_Task_Step_Completed_Toggle", conn))
{
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@TaskStepID", SqlDbType.Int).Value = TaskStepID;
cmd.Parameters.Add("@AdminUserID", SqlDbType.Int).Value = "10";
cmd.Parameters.Add("@LogActionItemID", SqlDbType.Int).Value = "15";
cmd.Parameters.AddWithValue("@DTStamp", SqlDbType.DateTime.ToString("d")).Value = DateTime.Now.ToString("d");
conn.Open();
cmd.ExecuteNonQuery();
conn.Close();
Response.Redirect("Tasks.aspx?id=" + ProjectID.ToString());
}
}
我已尽力描述该问题。回顾一下:嵌套的 gridview 具有带有复选框的行。单击复选框会自动更新数据库表，但无论复选框行如何，CheckedChanged 代码都只会注册最新 ID 的 ID。任何见解都值得赞赏。
卡洛斯
最佳答案
如果我理解正确，我相信您的问题在于您认为如何获取 GridViewRow 的 TaskStepID 。你正在做很多不必要的工作。无需迭代两个 GridView 的每一行，只需获取刚刚单击的 CheckBox 的 GridViewRow 即可。
CheckBox cb = (CheckBox)sender;
GridViewRow row = (GridViewRow)cb.NamingContainer;
GridView gv = (GridView)row.NamingContainer;
string taskStepID = gv.DataKeys[row.RowIndex].Value.ToString();
请注意，通过像您一样迭代每一行，您总是可以获得最后一行的 TaskStepID。因此，当您在其前面添加一行时，它使用的是最后一行，而不是您期望的行。
关于c# - 如何获取选中复选框的嵌套 GridView 中的字段值？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/25797889/