如何选择gridview中的所有复选框？ [英] How to select all checkbox in gridview?

问题描述

下面的代码不适用于全选复选框。点击选择全部复选框后，所有复选框都保持未选中状态。



我尝试了什么：

Below code doesn't work for select all checkbox. after clicking on select all checkbox,all checkboxes remain unchecked.

What I have tried:

<asp:GridView ID="grdMember" runat="server" CellPadding="4" ForeColor="#333333" 

                GridLines="None" HorizontalAlign="Center">
                <columns>
                <asp:TemplateField HeaderText="Select All">
                <headertemplate>
                <asp:CheckBox ID="checkbox2" OnCheckedChanged="CheckAll" runat="server" />
                
                <itemtemplate>
                <asp:CheckBox ID="IDCheckbox" runat ="server" />

protected void CheckAll(object sender, EventArgs e)
    {
        CheckBox chckheader = (CheckBox)grdMember.HeaderRow.FindControl("checkbox2");
        foreach (GridViewRow row in grdMember.Rows)
        {
            CheckBox chckrw = (CheckBox)row.FindControl("IDCheckbox");
            if (chckheader.Checked == true)
            {
                chckrw.Checked = true;

            }
            else
            {
                chckrw.Checked = false;
            }

        }
    }

推荐答案

Quote：

< asp：CheckBox ID =checkbox2OnCheckedChanged =CheckAllrunat =server/>

<asp:CheckBox ID="checkbox2" OnCheckedChanged="CheckAll" runat="server" />

你的 CheckAll 方法永远不会被解雇，因为你没有设置 AutoPostback 到 True 为您的 CheckBox 。将AutoPostback设置为true，这样就会触发 OnCheckedChanged 事件。

Your CheckAll method will never get fired because you haven't set AutoPostback to True for your CheckBox. Set AutoPostback to true so the OnCheckedChanged event will fire.

<asp:CheckBox ID="checkbox2" OnCheckedChanged="CheckAll" runat="server" AutoPostBack="True" />

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