findcontrol的复选框无法找到，但其ID已定义无法解决问题，请帮我解决问题 [英] findcontrol of checkbox is unable to find, but its ID already defined unable to solve the problem, please help me for solving problems

问题描述

  private   void  updatetono（）
 {
 DataTable dtpack =（DataTable）Session [  gridviewupdate]; 
 DataTable dtudate =  new  DataTable（）; 
  for （ int  i =  0 ; dtpack.Rows.Count >  i; i ++）
 {
 CheckBox checks =（CheckBox）grdno.Rows [i]。单元格[ 0 ]。FindControl（  gridviewtrans）; 
  if （checks.Checked）
 {
 dtudate = lo.updatehomeunactive（dtpack.Rows [i] [  PkgName]。ToString（））; 
 
} 
 其他 
 {
 
} 
} 
 
 
 
} 
 
 
 受保护  void  Updateno_Click（ object  sender，EventArgs e）
 {
 updatetono（）; 
} 
 
 
< asp：GridView ID =   grdno  runat =   server CellSpacing =    2宽度=   30％  CellPadding =   4 
 AutoGenerateColumns =   False ForeColor =  ＃333333高度=   86px alignment =   left 
 Style =   margin-top：3px >  
< colum NS> 
< asp：TemplateField HeaderText =  选择 >  
< itemtemplate> 
< asp：CheckBox ID =   gridviewtrans runat =   server /> 
 < /   itemtemplate  >  
 
< asp：TemplateField HeaderText =   S.No。 HeaderStyle-Horizo​​ntalAlign =  左 >  
< itemtemplate> 
<％#Container.DataItemIndex + 1 ％>  
 < /   itemtemplate  >  
< HeaderStyle Horizo​​ntalAlign =  左 >  < /   HeaderStyle  >  
 
< asp：BoundField DataField =   PkgName HeaderText =  < span class =code-string> PkgName /> 
< asp：BoundField DataField =   HomeActive HeaderText =  状态 /> 
 < /  列 >  
 
< br /> 
< asp：按钮ID =   Updateno runat =   server 
 Text =  更新为否 onclick =   Updateno_Click /> 
< br /> 

Aspx页面代码

 <   asp：GridView     ID   =  grdno    runat   =  server    CellSpacing   =  2   宽度  =  30％    CellPadding   =  4  
   
            < span class =code-attribute>                               AutoGenerateColumns   = 错误    ForeColor   = ＃333333   高度  =  86px    alignment   =  left  
   
  < span class =code-attribute>                                        样式  =  margin-top：3px >  
 <  列 >  
 <   asp：TemplateField     HeaderText   = 选择 >  
 <   ItemTemplate中 >  
 <   asp：CheckBox     ID   = < span class =code-keyword> gridviewtrans    runat   =  server  /  >  
 <   / ItemTemplate  >  
 <   / asp：TemplateField  >  
 <   as p：TemplateField     HeaderText   =  S.No。    HeaderStyle-Horizo​​ntalAlign   = 左 >  
 <   ItemTemplate  >  
 <％ #Container.DataItemIndex + 1 ％>  
 < span class =code-keyword><   / ItemTemplate  >  
 <   Head erStyle     Horizo​​ntalAlign   = 左 >  <   / HeaderStyle  >  
 <   / asp：TemplateField  >  
 <   asp：BoundField     DataField   =  PkgName    HeaderText   =  PkgName    /  >  
 <  < span class =code-leadattribute> asp：BoundField     DataField   =  HomeActive    HeaderText   = 状态    /  >  
 <   /列 >  
 < ;   / asp：GridView  >  
 <   br     /  >  
& nbsp;& nbsp;& nbsp;& nbsp; <   asp：按钮    ID   =  Updateno    runat   =  server  
   
                                          文字  = 更新为否    onclick   =  Updateno_Click    /  >  
 <   br     /  >  

解决方案

您好，

修改你的代码并试试这种方式

 private void updatetono（）
 {
 DataTable dtpack =（DataTable）Session [ gridviewupdate]; 
 DataTable dtudate = new DataTable（）; 
 for（int i = 0; dtpack.Rows.Count> i; i ++）
 {
 //在此更改
 CheckBox checks =（CheckBox）grdno.Rows [i ] .FindControl（ gridviewtrans）; 
 if（checks！= null&& checks.Checked）
 {
 dtudate = lo.updatehomeunactive（dtpack.Rows [i] [PkgName]。ToString（））; 
} 
其他
 {
 
} 
} 
} 

谢谢

private void updatetono()
   {
         DataTable dtpack = (DataTable)Session["gridviewupdate"];
           DataTable dtudate = new DataTable();
           for (int i = 0; dtpack.Rows.Count > i; i++)
        {
            CheckBox checks = (CheckBox)grdno.Rows[i].Cells[0].FindControl("gridviewtrans");
            if(checks.Checked)
            {
                dtudate = lo.updatehomeunactive(dtpack.Rows[i]["PkgName"].ToString());
                                             
            }
            else
            {

            }
        }

    

}


    protected void Updateno_Click(object sender, EventArgs e)
    {
        updatetono();
    }


<asp:GridView ID="grdno" runat="server" CellSpacing="2" Width="30%" CellPadding="4"
                    AutoGenerateColumns="False" ForeColor="#333333" Height="86px" alignment="left"
                    Style="margin-top: 3px">
                    <columns>
                            <asp:TemplateField HeaderText="Select">
                                <itemtemplate>
                                    <asp:CheckBox ID="gridviewtrans" runat="server"/>
                                </itemtemplate>
                            
                            <asp:TemplateField HeaderText="S.No." HeaderStyle-HorizontalAlign="Left">
                                <itemtemplate>
                                    <%# Container.DataItemIndex+1 %>
                                </itemtemplate>
                                <HeaderStyle HorizontalAlign="Left"></HeaderStyle>
                            
                            <asp:BoundField DataField="PkgName" HeaderText="PkgName" />
                            <asp:BoundField DataField="HomeActive" HeaderText="Status" />
                        </columns>
                      
                      <br />
                     <asp:Button ID="Updateno" runat="server"
                    Text="Update To No" onclick="Updateno_Click" />
                <br />

Aspx page code

<asp:GridView ID="grdno" runat="server" CellSpacing="2" Width="30%" CellPadding="4"

                    AutoGenerateColumns="False" ForeColor="#333333" Height="86px" alignment="left"

                    Style="margin-top: 3px">
                    <Columns>
                            <asp:TemplateField HeaderText="Select">
                                <ItemTemplate>
                                    <asp:CheckBox ID="gridviewtrans" runat="server"/>
                                </ItemTemplate>
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="S.No." HeaderStyle-HorizontalAlign="Left">
                                <ItemTemplate>
                                    <%# Container.DataItemIndex+1 %>
                                </ItemTemplate>
                                <HeaderStyle HorizontalAlign="Left"></HeaderStyle>
                            </asp:TemplateField>
                            <asp:BoundField DataField="PkgName" HeaderText="PkgName" />
                            <asp:BoundField DataField="HomeActive" HeaderText="Status" />
                        </Columns>
                      </asp:GridView>
                      <br />
                 &nbsp;&nbsp;&nbsp;&nbsp;<asp:Button ID="Updateno" runat="server"

                    Text="Update To No" onclick="Updateno_Click" />
                <br />

解决方案

Hello ,
Modify your code and try this way

private void updatetono()
   {
         DataTable dtpack = (DataTable)Session["gridviewupdate"];
           DataTable dtudate = new DataTable();
           for (int i = 0; dtpack.Rows.Count > i; i++)
        {
           //change here
           CheckBox checks = (CheckBox)grdno.Rows[i].FindControl("gridviewtrans"); 
            if(checks != null && checks.Checked)
            {
                dtudate = lo.updatehomeunactive(dtpack.Rows[i]["PkgName"].ToString());                                             
            }
            else
            {
 
            }
        }  
 }

Thanks

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