c# - 如何为 HTMLTable 中的某些特定单元格着色？

Question

我为我的公司开发了一个培训矩阵，向所有员工展示了公司提供的所有培训类(class)。现在，我必须以易于管理员编辑和更新的方式开发它。我做的一切都是正确的，除了一件事是为每组类(class)赋予特定的颜色(因为我有 3 种类型的类(class))，从第四个单元格到最后一个单元格。仅供引用，我有两个 SqlDataSources 用于开发此矩阵:

SqlDataSource1 用于检索 GroupID:

<asp:SqlDataSource ID="SqlDataSource1" runat="server"
                ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
                SelectCommand="SELECT [ID] FROM [groups]"></asp:SqlDataSource>

SqlDataSource2 将从 SqlDataSource1 获取 GroupID 并使用它来生成矩阵:

<asp:SqlDataSource ID="SqlDataSource2" runat="server"
                                            ConnectionString="<%$ ConnectionStrings:testConnectionString %>"
                                            SelectCommandType="StoredProcedure" SelectCommand="kbiReport" FilterExpression="[Division] like '{0}%'">

                            <SelectParameters>
                                <asp:Parameter  Name="GroupID"/>
                            </SelectParameters>

                            <FilterParameters>
                                <asp:ControlParameter ControlID="ddlDivision" Name="DivisionName"
                                                         PropertyName="SelectedValue" Type="String" />
                            </FilterParameters>

            </asp:SqlDataSource>

现在，由于我使用的是 HTMLTable，因此我需要访问 SqlDataSource1 来执行一些逻辑，例如: 如果 GroupID = 1，则为该组指定蓝色，依此类推。我可以通过执行以下操作来做到这一点:

我的 C# 隐藏代码:

protected void Page_Load(object sender, EventArgs e)
    {

        DataView dv2 = (DataView)SqlDataSource1.Select(DataSourceSelectArguments.Empty);
        foreach (DataRowView group in dv2)
        {
            SqlDataSource2.SelectParameters[0].DefaultValue = group[0].ToString();
            //create a new HtmlTable object
            HtmlTable table = new HtmlTable();

            DataView dv = (DataView)SqlDataSource2.Select(DataSourceSelectArguments.Empty);
            int columns = dv.Table.Columns.Count;
            int rows = dv.Count;

            //table's formating-related properties
            table.Border = 2;
            table.CellPadding = 3;
            table.CellSpacing = 3;
            table.Width = "900px";

            //to get the css style
            table.Attributes["class"] = "uGrid";

            //create a new HtmlTableRow and HtmlTableCell objects
            HtmlTableRow row;
            HtmlTableRow header = new HtmlTableRow();
            HtmlTableCell cell;


            //for adding the headers to the table
            foreach (DataColumn column in dv.Table.Columns)
            {
                HtmlTableCell headerCell = new HtmlTableCell("th");
                headerCell.InnerText = column.Caption;

                //The following if-else statements are for checking the GroupID and give each group
                //a specific color
                if (group[0].ToString().Equals("1"))
                    headerCell.BgColor = "lightBlue";
                else if (group[0].ToString().Equals("2"))
                    headerCell.BgColor = "lightYellow";
                else if (group[0].ToString().Equals("3"))
                    headerCell.BgColor = "Orange";

                //the header cells to the header
                header.Cells.Add(headerCell);
            }
            table.Rows.Add(header);

            //loop for adding rows to the table
            foreach (DataRowView datarow in dv)
            {
                row = new HtmlTableRow();
                //row.BgColor = "yellow";


                //loop for adding cells
                for (int j = 0; j < columns; j++)
                {
                    cell = new HtmlTableCell();
                    if (j < 4)
                    {
                        cell.InnerText = datarow[j].ToString();
                    }
                    else
                    {

                        CheckBox checkbox = new CheckBox();

                        int checkBoxColumns = dv.Table.Columns.Count - 5;
                        string fieldvalue = datarow[j].ToString();
                        string yes = fieldvalue.Split(new string[] { ", " }, StringSplitOptions.RemoveEmptyEntries)[1];
                        string courseid = fieldvalue.Split(new string[] { ", " }, StringSplitOptions.RemoveEmptyEntries)[0];
                        checkbox.ID = row.Cells[3].InnerText + "," + courseid.Trim();
                        checkbox.Checked = yes.Equals("Yes");
                        cell.Controls.Add(checkbox);

                    }

                    //add the cell to the current row
                    row.Cells.Add(cell);
                }

                //add the row to the table
                table.Rows.Add(row);
            }

            //add the table to the page
            PlaceHolder1.Controls.Add(table);

        }
    }

每组有不同数量的类(class)，但着色应从第四个单元格开始到最后一个单元格。我在上面代码的以下部分做了很多尝试，但失败了，我不知道为什么。 那么如何做到这一点？

//for adding the headers to the table
            foreach (DataColumn column in dv.Table.Columns)
            {
                HtmlTableCell headerCell = new HtmlTableCell("th");
                headerCell.InnerText = column.Caption;

                //The following if-else statements are for checking the GroupID and give each group
                //a specific color
                if (group[0].ToString().Equals("1"))
                    headerCell.BgColor = "lightBlue";
                else if (group[0].ToString().Equals("2"))
                    headerCell.BgColor = "lightYellow";
                else if (group[0].ToString().Equals("3"))
                    headerCell.BgColor = "Orange";

                //the header cells to the header
                header.Cells.Add(headerCell);
            }
            table.Rows.Add(header);

Answer 1

我会使用 ListView 控件构建 html 表来解决这个问题。使用 ListView 控件，您可以访问 OnItemDataBound 属性，您可以使用该属性编写代码来为您需要的特定行着色。