在asp.net中找不到id gridview [英] not finding id gridview in asp.net

问题描述

你好朋友，

我正在使用此代码从网格视图中匹配id中的值.但是我遇到一个错误(索引超出范围.必须为非负数并且小于集合的大小.
参数名称:索引)此处的mu code复选框正在运行，但我没有获得id的行的ID.请帮助我，我要去哪里了.如果您在理解中遇到问题，请别生气，我的英语不太好.

Hello friends,

I am using this code to gatch the value in id from a grid view.but i am getting an error(Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index)Here in mu code check box is working but i not getting the value id the id of the row.please help me out , where i am going wrong.And plese do not be angry if you are getting problem in understanding, my english is not so good.

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" 

            BackColor="White" BorderColor="White" BorderStyle="Ridge" BorderWidth="2px" 

            CellPadding="3" CellSpacing="1" GridLines="None">
            <footerstyle backcolor="#C6C3C6" forecolor="Black" />
            <rowstyle backcolor="#DEDFDE" forecolor="Black" />
            <columns>
            <asp:TemplateField HeaderText="Select">
                                <itemtemplate>
                                    <asp:CheckBox ID="chk" runat="server" />
                                </itemtemplate>
            
                <asp:BoundField HeaderText="id" DataField="id" />
                
                <asp:BoundField HeaderText="Question" DataField="Question" />
                
                <asp:BoundField DataField="Option1" HeaderText="Option1" />
                
                <asp:BoundField DataField="Option2" HeaderText="Option2" />
                <asp:BoundField DataField="Option3" HeaderText="Option3" />
                <asp:BoundField DataField="Option4" HeaderText="Option4" />
                <asp:BoundField DataField="Correct" HeaderText="Answer" />
            </columns>
            <pagerstyle backcolor="#C6C3C6" forecolor="Black" horizontalalign="Right" />
            <SelectedRowStyle BackColor="#9471DE" Font-Bold="True" ForeColor="White" />
            <HeaderStyle BackColor="#4A3C8C" Font-Bold="True" ForeColor="#E7E7FF" />

Dfault.aspx.cs代码

Dfault.aspx.cs code

 for (int num = 0; num < i; num++)
       {

     CheckBox chk_box = (CheckBox)GridView1.Rows[num].FindControl("chk");
     string ques_id=GridView1.DataKeys[num].Values["id"].ToString();
           if (chk_box.Checked == true)
           {
            // code
           }
}

</pre>

推荐答案

看起来您要迭代的次数比网格视图中的行数还多.改为使用foreach ，不会出现问题.

Looks like you are iterating more times then number of rows in grid view. Use foreach instead and the problem should not come.

将绑定字段更改为< asp:templatefield xmlns:asp =#unknown">并在项目模板中标记.之后，请在您的CS页面上尝试此操作...

change your bound field to <asp:templatefield xmlns:asp="#unknown"> and label in item template.after that try this on your cs page...

foreach (GridViewRow gr in Gridview1.Rows)
       {
           CheckBox chk = (CheckBox)gr.FindControl("CheckBox1");
           if (chk.Checked == true)
           {
               Label lbl = (Label)gr.FindControl("label1"); // id of label from which tou want to fetch values
            //code
           }
       }</asp:templatefield>

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