我无法在DetailsView TemplateField中设置子TextBox属性

问题描述

我似乎无法在DetailsView模板字段中的多行文本框上设置ReadOnly属性，我想设置只读，直到调用编辑模式，然后在用户退出编辑模式时将其设置回来。

C＃函数DetailsView2_ModeChanged被调用，因为我可以装饰DetailsView的标题就好了，我可以在调试模式中读取TextBox的属性就好了，它只是不接受任何更改？ br />


任何建议表示赞赏。

I seem unable to set the ReadOnly properties on a multiline text box that I have inside a DetailsView Template field, I would like to set Read Only until Edit Mode is called then set it back when the user is out of edit mode.
The C# function DetailsView2_ModeChanged is getting called as I can decorate the header of the DetailsView just fine, I can read the properties of the TextBox in debug mode just fine, it just will not accept any change?

Any suggestions appreciated.

<form id="form1" runat="server">
  <div>

  <h2>
      Timetable July 4th to September 25th
           <asp:Label id="Label1" runat="server"/>
  </h2>

     <asp:ObjectDataSource ID="ObjectDataSource1" runat="server"

      OldValuesParameterFormatString="original_{0}"

      SelectMethod="GetDataBySelectedRec"

      TypeName="TimetableListTableAdapters.tblTimetableListTableAdapter"

      UpdateMethod="UpdateQueryTimetableList">

      <SelectParameters>
          <asp:QueryStringParameter DefaultValue="1988" Name="lngIndex"

              QueryStringField="lngIndex" Type="Int32" />
      </SelectParameters>

      <UpdateParameters>
          <asp:Parameter Name="Hide" Type="Boolean" />
          <asp:Parameter Name="Formation" Type="String" />
          <asp:Parameter Name="Remarks" Type="String" />
          <asp:Parameter Name="Done" Type="Boolean" />
          <asp:Parameter Name="Layout" Type="String" />
          <asp:Parameter Name="Original_lngIndex" Type="Int32" />
      </UpdateParameters>
  </asp:ObjectDataSource>

  <asp:DetailsView ID="DetailsView2" runat="server" AutoGenerateRows="False"

      DataSourceID="ObjectDataSource1" Height="320px" Width="350px"

      CssClass="DataWebControlStyle" CellPadding="3"

      EmptyDataText="No Records Selected" DataKeyNames="lngIndex"

      OnModeChanged="DetailsView2_ModeChanged" >
      <AlternatingRowStyle CssClass="AlternatingRowStyle" />
      <Fields>
          <asp:BoundField DataField="lngIndex" HeaderText="Record ID:"

              InsertVisible="False" SortExpression="lngIndex" ReadOnly="True" >
          </asp:BoundField>

          <asp:TemplateField HeaderText="Test:">
              <ItemTemplate>
                  <asp:TextBox ID="txtTest" runat="server" CssClass="right"  TextMode="MultiLine"

                        Text="Unbound" BorderStyle="None" Height="200px" Width="450px" BackColor="#EFF3FB" Font-Names="arial" Font-Size="8pt" ForeColor="DimGray" />
              </ItemTemplate>
          </asp:TemplateField>


          <asp:CommandField ShowEditButton="True" />

      </Fields>

  </asp:DetailsView>

  </div>
  </form>

======================== ==========================

==================================================

public void DetailsView2_ModeChanged(Object sender, EventArgs e)
 {
     if (DetailsView2.CurrentMode == DetailsViewMode.Edit)
     {
         DetailsView2.HeaderText = "Edit Mode";
         DetailsView2.HeaderStyle.ForeColor = System.Drawing.Color.Red;
         DetailsView2.HeaderStyle.BackColor = System.Drawing.Color.LightGray;

         TextBox tb = DetailsView2.FindControl("txtTest") as TextBox;
         String str1 = tb.Text.ToString();

         ((TextBox)DetailsView2.FindControl("txtTest")).BackColor = System.Drawing.Color.Red;
         ((TextBox)DetailsView2.FindControl("txtTest")).ReadOnly = false;
     }

     if (DetailsView2.CurrentMode == DetailsViewMode.ReadOnly)
     {
         DetailsView2.HeaderText = "Read-Only Mode";
         DetailsView2.HeaderStyle.ForeColor = System.Drawing.Color.Blue;
         DetailsView2.HeaderStyle.BackColor = System.Drawing.Color.White;

         ((TextBox)DetailsView2.FindControl("txtTest")).BackColor = System.Drawing.Color.Blue;
         ((TextBox)DetailsView2.FindControl("txtTest")).ReadOnly = true;
     }
 }

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