Question

我在gridview中进行插入/更新和删除。为此我使用ItemTemplate包含标签来显示值。但是当gridview处于编辑模式时，下拉列表代替了这些标签。我想将下拉列表的选定值设置为标签的值。我的下拉列表没有数据源。我绑定下拉列表从0到99.下面是我的编辑方法的代码。

 protected void grdUsedCatheters_RowEditing(object sender, GridViewEditEventArgs e)
 {
    try
    {
        grdUsedCatheters.EditIndex = e.NewEditIndex;
        BindCatheterGrid();
        DropDownList ddlFrom = (DropDownList)grdUsedCatheters.Rows[e.NewEditIndex].FindControl("ddFrom");
        DropDownList ddlTo = (DropDownList)grdUsedCatheters.Rows[e.NewEditIndex].FindControl("ddTo");
        BindDropDowns(ddlFrom);
        BindDropDowns(ddlTo);

    }
    catch (Exception ex)
    {
        if (ex.HelpLink == null)
            lblMessage.Text = ex.Message;
        else
            lblMessage.Text = ex.HelpLink;
        lblMessage.CssClass = "ERROR";
    }

private void BindDropDowns(DropDownList ddl)
 {
    for (int i = 0; i <= 99; i++)
        ddl.Items.Add(i.ToString());
 }

下面的

是我的gridview标记的一部分

<asp:TemplateField HeaderText="Cine Run">
   <ItemTemplate>
        From:&nbsp;<asp:Label ID="lblFrom" runat="server" ><%# Eval("CineRunFrom")%></asp:Label>
        To:&nbsp;<asp:Label ID="lblTo" runat="server"><%# Eval("CineRunTo")%></asp:Label>
   </ItemTemplate>
   <EditItemTemplate>
       From:&nbsp;<asp:DropDownList ID="ddFrom" runat="server" Width="50px">
     </asp:DropDownList>
       To:&nbsp;<asp:DropDownList ID="ddTo" runat="server" Width="50px">
     </asp:DropDownList>
   </EditItemTemplate>
  <FooterTemplate>
       From:&nbsp;<asp:DropDownList ID="ddFromF" runat="server" Width="50px">              </asp:DropDownList>
       To:&nbsp;<asp:DropDownList ID="ddToF" runat="server" Width="50px">                                        </asp:DropDownList>
  </FooterTemplate>
 </asp:TemplateField>

}

Answer 1

在设置grdUsedCatheters.EditIndex = e.NewEditIndex并调用BindCatheterGrid()方法之前检索label的值，然后在填充DropDownLists后相应地设置其选定值。像这样：

protected void grdUsedCatheters_RowEditing(object sender, GridViewEditEventArgs e)
 {
    try
    {
        Label lblFrom = (Label)grdUsedCatheters.Rows[e.NewEditIndex].FindControl("lblFrom"); //lblFrom is the ID of label

        grdUsedCatheters.EditIndex = e.NewEditIndex;
        BindCatheterGrid();
        DropDownList ddlFrom = (DropDownList)grdUsedCatheters.Rows[e.NewEditIndex].FindControl("ddFrom");
        DropDownList ddlTo = (DropDownList)grdUsedCatheters.Rows[e.NewEditIndex].FindControl("ddTo");
        BindDropDowns(ddlFrom);
        BindDropDowns(ddlTo);

        ddlFrom.Text = lblFrom.Text;

    }
    catch (Exception ex)
    {
        if (ex.HelpLink == null)
            lblMessage.Text = ex.Message;
        else
            lblMessage.Text = ex.HelpLink;
        lblMessage.CssClass = "ERROR";
    }

}

修改并且还改变你的gridview标记：

<asp:TemplateField HeaderText="Cine Run"> <ItemTemplate> From: <asp:Label ID="lblFrom" runat="server" Text='<%# Eval("CineRunFrom")%>' /> To: <asp:Label ID="lblTo" runat="server" Text='<%# Eval("CineRunTo")%>' /> </ItemTemplate> ...

Answer 2

我认为这个例子适合你。

首先，您将隐藏字段放在EditItemTemplate中，其中您放置了Dropdownlist。在ItemTemplate

中设置label的值时设置隐藏字段的值

请参阅我的代码：

<asp:GridView runat="server" ID="gridExample" OnRowEditing="gridExample_RowEditing"
            AutoGenerateEditButton="True" AutoGenerateColumns ="false" OnRowCancelingEdit ="gridExample_RowCancelingEdit" >
            <Columns>
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:Label runat="server" ID="lblID" Text='<%# Eval("ID") %>'></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate>
                        <asp:DropDownList runat="server" ID="drpName">
                        </asp:DropDownList>
                        <asp:HiddenField runat ="server" ID ="hdnId" Value ='<%# Eval("ID") %>' />
                    </EditItemTemplate>
                </asp:TemplateField>
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:Label runat="server" ID="lblName" Text='<%# Eval("Name") %>'></asp:Label>
                    </ItemTemplate>
                    <EditItemTemplate >
                    <asp:TextBox runat ="server" ID="txtName" Text ='<%# Eval("Name") %>'  ></asp:TextBox>
                    </EditItemTemplate>
                </asp:TemplateField>
            </Columns>
        </asp:GridView>




protected void gridExample_RowEditing(object sender, GridViewEditEventArgs e)
        {
            gridExample.EditIndex = e.NewEditIndex;
            BindGrid();

            DropDownList dl=new DropDownList ();
            dl = (DropDownList)gridExample.Rows[gridExample.EditIndex].FindControl("drpName");
            FillDrops(dl);

            HiddenField hdnId = new HiddenField();
            hdnId = (HiddenField)gridExample.Rows[gridExample.EditIndex].FindControl("hdnId");
            dl.Text = hdnId.Value;

        }

在Gridview.RowEditing中设置下拉列表的选定值

2 个答案: