如何檢查GridView中複選框的狀態？

我有一個gridview，我做了一個模板列，裏面有一個複選框。然後我想檢查複選框的值。我試圖將該行的可見屬性設置爲false，當該行的複選框未被選中時。我總是得到null，不管我做什麼。如何檢查GridView中複選框的狀態？

它必須與FindControl()一個問題，但我認爲這是很正常的：

public partial class _Default : System.Web.UI.Page 
{ 
    protected void Page_Load(object sender, EventArgs e) 
    { 
     DbInteract dbi = new DbInteract("CONNECTION STRING"); 
     GridView1.DataSource = dbi.SqlDA("select * from table"); 
     GridView1.DataBind(); 
    } 
    protected void ProsseguirBtn_Click(object sender, EventArgs e) 
    { 
     if (!IsPostBack) 
     { 
      foreach (GridViewRow row in GridView1.Rows) 
      { 
       CheckBox cb = (CheckBox)row.FindControl("chk"); 
       if (!cb.Checked) 
       { 
        GridView1.Rows[row.RowIndex].Visible = false; 
       } 
      } 
     } 
    } 
}

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 

<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
    <title></title> 
</head> 
<body> 
    <form id="form1" runat="server"> 
    <div> 

     <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"> 
      <Columns> 
       <asp:TemplateField> 
        <EditItemTemplate> 
         <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> 
        </EditItemTemplate> 
        <ItemTemplate> 
         <asp:CheckBox ID="chk" runat="server" /> 
        </ItemTemplate> 
       </asp:TemplateField> 
       <asp:BoundField DataField="nome" HeaderText="jhf" /> 
      </Columns> 
     </asp:GridView> 
     <asp:Button ID="ProsseguirBtn" runat="server" Text="Button" 
      onclick="ProsseguirBtn_Click" /> 

     <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox> 

    </div> 
    </form> 
</body> 
</html>

來源

2010-06-22 lglifesgood