動態調整表格單元格的背景顏色在asp.net

Question

我有我的.aspx頁面上的以下表行：

<tr> 
     <td valign="bottom" style="width: 157px">Initial Requirements:&nbsp;&nbsp;&nbsp;&nbsp;</td> 
     <asp:Repeater ID="Repeater11" runat="server" DataSourceID="ObjectDataSource1"> 

     <ItemTemplate> 
     <td valign="bottom" id="ReqStatus" runat="server" style="background-color: Gray"> 
     <%#ReqStatus(CType(CType(Container.DataItem, System.Data.DataRowView).Row, DataSet1.DataTable1Row))%> 

     </td> 

     </ItemTemplate> 
     </asp:Repeater> 

     </tr> 

在後面的代碼，我有這樣的功能：

Protected Function ReqStatus(ByVal Project As DataSet1.DataTable1Row) As String 
     'Dim ReqTableCell As TableCell 
     'ReqTableCell = form1.FindControl("ReqStatus") 


     ' Check the status of the Development Completed 
     Dim rightNow As Date = Now() 
     Dim dateDifference As TimeSpan 
     If Not Project.IsNull("Requirements_Target") Then 

      Dim ReqTargetDate As Date = Project.Requirements_Target 

      If Project.IsNull("Req_Date") Then 
       dateDifference = ReqTargetDate.Subtract(rightNow) 

       If dateDifference.Days > 0 Then 

        If dateDifference.Days >= 60 Then 
         'ReqTableCell.BackColor = Drawing.Color.Green 
         Return "<strong><font color='green'>" & dateDifference.Days & "</font></strong>" 
        ElseIf dateDifference.Days > 30 And dateDifference.Days < 60 Then 
         'ReqTableCell.BackColor = Drawing.Color.Yellow 
         Return "<strong><font color='yellow'>" & dateDifference.Days & "</font></strong>" 
        Else 

         'ReqTableCell.BackColor = Drawing.Color.Red 
         Return "<strong><font color='red'>" & dateDifference.Days & "</font></strong>" 
        End If 

       Else 
        'ReqTableCell.BackColor = Drawing.Color.Red 
        Dim pastDue As Int16 = (dateDifference.Days * -1) 
        Return "<strong><font color='red'>" & pastDue & "</font></strong> days past" 

       End If 
      End If 
     Else 

     End If 
    End Function 

我可以根據條件語句更改返回值的顏色，但無法找出正確的語法來更改表格單元的背景。我的企圖被註釋掉了。

如何正確地聲明表格單元格？ Findcontrol一定不是正確的方法。

Answer 1

你可以做到這一點的代碼隱藏完全控制（未經測試，只是給你的想法）：

Private Sub Repeater1_ItemDataBound(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.RepeaterItemEventArgs) Handles Repeater1.ItemDataBound 
     Select Case e.Item.ItemType 
      Case ListItemType.Item 
       Dim Project As DataSet1.DataTable1Row = DirectCast(DirectCast(e.Item.DataItem, System.Data.DataRowView).Row, DataSet1.DataTable1Row) 
       Dim tdReqStatus As HtmlTableCell = DirectCast(e.Item.FindControl("tdReqStatus"), HtmlTableCell) 
       Dim lblReqStatus As Label = DirectCast(e.Item.FindControl("lblReqStatus"), Label) 
       ' Check the status of the Development Completed 
       Dim rightNow As Date = Now() 
       Dim dateDifference As TimeSpan 
       If Not Project.IsNull("Requirements_Target") Then 
        Dim ReqTargetDate As Date = Project.Requirements_Target 
        If Project.IsNull("Req_Date") Then 
         dateDifference = ReqTargetDate.Subtract(rightNow) 
         lblReqStatus.Font.Bold = True 

         If dateDifference.Days > 0 Then 

          If dateDifference.Days >= 60 Then 
           tdReqStatus.BgColor = "Green" 
           lblReqStatus.Text = dateDifference.Days.ToString 
          ElseIf dateDifference.Days > 30 And dateDifference.Days < 60 Then 
           tdReqStatus.BgColor = "Yellow" 
           lblReqStatus.Text = dateDifference.Days.ToString 
          Else 
           tdReqStatus.BgColor = "Red" 
           lblReqStatus.Text = dateDifference.Days.ToString 
          End If 

         Else 
          tdReqStatus.BgColor = "Red" 
          lblReqStatus.Text = (dateDifference.Days * -1).ToString 
         End If 
        End If 
       End If 
     End Select 
    End Sub 

，並在ASPX：

<table> 
    <asp:Repeater ID="Repeater1" runat="server"> 
     <ItemTemplate> 
      <tr> 
      <td valign="bottom" id="TdReqStatus" runat="server" > 
       <asp:label ID="lblReqStatus" runat="server" ></asp:label> 
      </td> 
      </tr> 
     </ItemTemplate> 
    </asp:Repeater> 
    </table> 

Answer 2

看我的溶液中，該剪斷：

TableRow tr = new TableRow(); 
TableCell tc = new TableCell { Text = "someText"}; 

tc.BackColor = ColorTranslator.FromHtml("#0000FF"); 
tc.ForeColor = ColorTranslator.FromHtml("#FFFFFF"); 
tc.Font.Bold = true; 
tc.Font.Size = 16; 

tr.Cells.Add(tc); 
table.Rows.Add(tr); 

在完成這一步並控制所有語句後，您可以在網頁中呈現表格。