Gridview 中 TemplateField 中的复选框在回发时丢失 [英] Checkbox in TemplateField in Gridview loses checked on postback

问题描述

我有一个带有模板字段的 gridview.在该模板字段中是一个复选框.我在 gridview 之外有一个提交按钮来分配已检查的记录.在回发时，没有复选框注册为被选中.这是我的代码:

I have a gridview with a template field. In that template field is a checkbox. I have a submit button outside of the gridview to assign the records that were checked. On the postback no checkboxes register as being checked. Here is my Code:

<Columns>
                <asp:TemplateField>
                    <ItemTemplate>
                        <asp:CheckBox ID="cb" Checked="false" runat="server" />
                        <asp:Label ID="lblCFID" runat="server" Visible="false" Text='<%# Eval("ID") %>' />
                    </ItemTemplate>
                </asp:TemplateField>
                <asp:BoundField HeaderStyle-HorizontalAlign="Center" DataField="Name" HeaderText="Name" />
                <asp:BoundField HeaderStyle-HorizontalAlign="Center" DataField="DOB" HeaderText="Date of Birth" />
                <asp:BoundField HeaderStyle-HorizontalAlign="Center" HeaderText="Gender" DataField="Gender"  />
                <asp:BoundField HeaderStyle-HorizontalAlign="Center" HeaderText="Status" DataField="Status"  />
                <asp:BoundField HeaderStyle-HorizontalAlign="Center" HeaderText="Plan Name" DataField="PlanName"  />
                <asp:BoundField HeaderStyle-HorizontalAlign="Center" HeaderText="Type" DataField="ControlType"  />
                <asp:BoundField HeaderStyle-HorizontalAlign="Center" HeaderText="Date of Service" dataformatstring="{0:MMMM d, yyyy}" htmlencode="false" DataField="DateofService"  />
            </Columns>

protected void AssignRecords(object sender, EventArgs e)
{
    int Rows = gvASH.Rows.Count;
    for (int i = 0; i < Rows; i++)
    {
        //CheckBoxField cb = ((CheckBoxField)gvASH.Rows[i].Cells[1]).;
        CheckBox cb = (CheckBox)gvASH.Rows[i].Cells[0].FindControl("cb");
        Label lblID = (Label)gvASH.Rows[i].Cells[0].FindControl("lblCFID");
        if (cb.Checked == true)
        {

            string ID = lblID.Text;
            //Assign Code
        }
    }
}

我在字符串 ID = lblID.Text 上设置了一个断点；但它从未找到任何已检查的内容.

I have a breakpoint set on the string ID = lblID.Text; but it never finds any that are checked.

推荐答案

我觉得你缺少的是，当你点击按钮并且你的页面回发时，你重新绑定到gridview，你需要在这种情况下绑定

I think what you are missing is, when you click on the button and your page is postback, you rebinding to gridview, you need to bind in this condition like

 if (!Page.IsPostBack)
    {
        GridView1.DataSourceID = "yourDatasourceID";
        GridView1.DataBind();
    }

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