在Asp.net WebForm中的UpdatePanel内的模板TextBox feild [英] Template TextBox feild inside UpdatePanel in Asp.net WebForm

问题描述

我有一个数据绑定网格视图，里面有一个文本框模板字段



标记如下所示

I have a databound gridview and I have a textbox template field inside that

the markup look like the below

  <asp:UpdatePanel ID="UpdatePanel1"   runat="server">
                <ContentTemplate>
                    <asp:GridView ID="tbl_costing" runat="server" AutoGenerateColumns="False" OnRowDataBound="tbl_costing_RowDataBound" CellPadding="4" ForeColor="#333333" GridLines="None" Width="1023px" ShowHeaderWhenEmpty="True">
                        <AlternatingRowStyle BackColor="White" />
                        <Columns>

  <asp:TemplateField HeaderText="Consumption" SortExpression="Consumption">
                                <ItemTemplate>
                                    <asp:UpdatePanel ID="UpdatePanel3" runat="server">
                                        <ContentTemplate>
                                            <asp:TextBox ID="txt_consumption" runat="server" Text='<%# Bind("Consumption") %>' AutoPostBack="True" OnTextChanged="txt_consumption_TextChanged"></asp:TextBox>
                                        </ContentTemplate>
                                    </asp:UpdatePanel>
                                    <asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ControlToValidate="txt_consumption" ErrorMessage="Required" ForeColor="#CC3300">*</asp:RequiredFieldValidator>

                                    <asp:RegularExpressionValidator ID="RegularExpressionValidator1" runat="server" ControlToValidate="txt_consumption" ErrorMessage="Enter valid Consumption" ForeColor="Red" ValidationExpression="^[\d.]+$">*</asp:RegularExpressionValidator>
                                </ItemTemplate>
                            </asp:TemplateField>
</Columns>
   </asp:GridView>
                </ContentTemplate>
            </asp:UpdatePanel>

现在我需要在回发事件中获取文本框的行索引我这样做了

Now I need to get the row index of the Textbox on post back event I did it like this

protected void txt_consumption_TextChanged(object sender, EventArgs e)
        {

            try
            {
                TextBox txtcons = (TextBox)sender;
                GridViewRow currentRow = (GridViewRow)txtcons.Parent.Parent; // Error Here .....
                int rowindex = 0;
                rowindex = currentRow.RowIndex;
                calculateperdozen(currentRow);

            }
            catch (Exception)
            {


            }


        }

任何人都可以建议获取当前行或行索引的方法

Can anyone suggest be a way to get the current Row or row index

推荐答案

> * < / asp：RegularExpressionValidator >
< / ItemTemplate >
< / asp：TemplateField >
< /列 >
< / asp：GridView >
< / ContentTemplate >
< / asp：UpdatePanel >

">*</asp:RegularExpressionValidator> </ItemTemplate> </asp:TemplateField> </Columns> </asp:GridView> </ContentTemplate> </asp:UpdatePanel>

现在我需要在回复后的事件中获取文本框的行索引就像这样

Now I need to get the row index of the Textbox on post back event I did it like this

protected void txt_consumption_TextChanged(object sender, EventArgs e)
        {

            try
            {
                TextBox txtcons = (TextBox)sender;
                GridViewRow currentRow = (GridViewRow)txtcons.Parent.Parent; // Error Here .....
                int rowindex = 0;
                rowindex = currentRow.RowIndex;
                calculateperdozen(currentRow);

            }
            catch (Exception)
            {


            }


        }

任何人都可以建议获取当前行或行索引的方法

Can anyone suggest be a way to get the current Row or row index

你好，



试试这个

GridViewRow currentRow =（GridViewRow）txtcons.Parent.Parent.Parent.Parent;



谢谢，

希望这会有所帮助！

Hello,

Try this
GridViewRow currentRow = (GridViewRow)txtcons.Parent.Parent.Parent.Parent;

Thanks,
Hope this helps !!!

依赖于标记的确切结构是一种非常脆弱的方法。一旦触摸标记，您将不得不返回代码来更新您遍历的 .Parent 节点的数量。



更好的方法是走向控制树，寻找指定类型的容器：

Relying on the exact structure of the markup is a very brittle approach. As soon as you touch the markup, you'll have to go back through your code to update the number of .Parent nodes you traverse.

A better approach would be to walk up the control tree, looking for a container of a specified type:

public static class ControlTreeExtensions
{
    public static TContainer ClosestContainer<TContainer>(this Control theControl) where TContainer : Control
    {
        if (theControl == null) throw new ArgumentNullException("theControl");
        
        Control current = theControl.NamingContainer;
        TContainer result = current as TContainer;
        while (current != null && result == null)
        {
            current = current.NamingContainer;
            result = current as TContainer;
        }
        
        return result;
    }
}

然后您可以使用此方法查找特定类型的最近容器，记住要检查 null 如果找不到指定类型的容器：

You can then use this method to find the closest container of a particular type, remembering to check for null if a container of the specified type is not found:

protected void txt_consumption_TextChanged(object sender, EventArgs e)
{
    TextBox txtcons = (TextBox)sender;
    GridViewRow currentRow = txtcons.ClosestContainer<GridViewRow>();
    if (currentRow != null)
    {
        calculateperdozen(currentRow);
    }
}

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