c# - 获取gridview复选框

Question

我有这个模板字段

        <asp:TemplateField ItemStyle-Width="40px">
                    <HeaderTemplate>
                        <asp:CheckBox ID="chkboxSelectAll" runat="server" AutoPostBack="true" OnCheckedChanged="chkboxSelectAll_CheckedChanged" />
                    </HeaderTemplate>
                    <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle" />
                    <ItemTemplate>
                        <asp:CheckBox ID="chkEmp" runat="server"></asp:CheckBox>
                    </ItemTemplate>
                </asp:TemplateField>      
        <asp:TemplateField ShowHeader="False">

在代码隐藏中我有这段代码:

        protected void chkboxSelectAll_CheckedChanged(object sender, EventArgs e)
        {
            CheckBox ChkBoxHeader = (CheckBox)grdGeral.HeaderRow.FindControl("chkboxSelectAll");
            foreach (GridViewRow row in grdGeral.Rows)
            {
                CheckBox ChkBoxRows = (CheckBox)row.FindControl("chkEmp");
                if (ChkBoxHeader.Checked == true)
                {
                    ChkBoxRows.Checked = true;
                }
                else
                {
                    ChkBoxRows.Checked = false;
                }
            }

        }

    protected void btnLista_Click(object sender, EventArgs e)
    {
        string strEmailTotal = "";
        string strEmail = "";


        foreach (GridViewRow row in grdGeral.Rows)
        {
                CheckBox chkBx = (CheckBox)grdGeral.FindControl("chkEmp");
                if (chkBx != null)
                {
                    if (chkBx.Checked)
                    { 
                    strEmail = ((Label)grdGeral.FindControl("lblEmail")).Text;
                    strEmailTotal = strEmailTotal + "," + strEmail;
                }
                }
        }

        lblMail.Text = strEmailTotal ;
    }

即使我在模板字段中将默认值设置为“true”，我也总是得到复选框的空值。谁能帮我这个？谢谢

Answer 1

在您的btnLista_Click 事件中，您应该使用row 而不是grdGeral:
CheckBox chkBx = (CheckBox)row.FindControl("chkEmp");
在下面也是一样的:

strEmail = ((Label)row.FindControl("lblEmail")).Text;