为什么我的gridview不接受单选按钮列表 [英] why my gridview not accepting radio button list

问题描述

朋友....
我想要带有RadioButton模板字段的GridView.为此，我编写了以下代码:

Hi Friends....
I want GridView with RadioButton template field. for that I write the below code:

<pre lang="ASPX">
 <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False">
        <Columns>
        <asp:BoundField DataField="AdmissionNo" HeaderText="AdmNo" />
        <asp:BoundField DataField="RollNo" HeaderText="RollNo" />
        <asp:BoundField DataField="FullName" HeaderText="Name" />
        <asp:TemplateField HeaderText="Attandance">
        <ItemTemplate>
        <asp:RadioButtonList ID="rbAtt" runat="server">
        <asp:ListItem Text="Present" Value="p">
        </asp:ListItem>
        <asp:ListItem Text="Absent" Value="A"></asp:ListItem>
        <asp:ListItem Text="Leave" Value="L"></asp:ListItem>
        </asp:RadioButtonList></ItemTemplate></asp:TemplateField></Columns>
        </asp:GridView>

但是当我运行程序时，此GridView不接受此RadioButton，它将返回此值为null.

But when I run the program this GridView is not accept this RadioButton it returns this value is null..

BindGrid()
{
con.Open();
SqlCommand cmd = new SqlCommand("Select AdmissionNo,FullName,RollNo from Student_Full where PresentClass='1st Class'", con);
SqlDataAdapter da = new SqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
GridView1.DataSource = ds;
GridView1.DataBind();
con.Close();
}
 protected void Button1_Click(object sender, EventArgs e)
    {
 for (int i = 0; i < GridView1.Rows.Count; i++)
        {
            RadioButtonList rbAtt = (RadioButtonList)GridView1.Rows[i].Cells[3].FindControl("rbAtt");
            if (rbAtt.SelectedItem == null)
            {
                lblatt.Text = "Select student Attendance";
            }
            if (rbAtt.SelectedItem != null)
            {
                string sid = GridView1.Rows[i].Cells[0].Text;
                con.Open();
                SqlCommand cmd = new SqlCommand("InsertAttendence", con);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.AddWithValue("@Date", (DateTime.Now.Month + DateTime.Now.Year).ToString());
                cmd.Parameters.AddWithValue("@StudentId", sid);
                cmd.Parameters.AddWithValue("@Evening", rbAtt.SelectedItem.Value);
                cmd.Parameters.AddWithValue("@PostedOn", DateTime.Now.ToLocalTime());
                cmd.Parameters.AddWithValue("@PostedBy", Session["StaffId"].ToString());
                cmd.ExecuteNonQuery();
                con.Close();
                lblatt.ForeColor = System.Drawing.Color.Green;
                lblatt.Text = "your attendance is posted successfully.......";
            }
        }
}

任何一个 pls 都可以帮助我...

any one pls please help me...

推荐答案

您在哪里调用gridview的绑定方法?我认为您在pageload事件中完成了所有绑定代码.验证是否绑定方法是在每次回发时调用，如果是，则将其更改:-

where you are calling binding method of gridview ? i think you done your all binding code inside pageload event. verify is binding method is calls on every postback if yes then change it :-

if (!Page.IsPostBack)
        {
           //yuor binding code
        }

< asp:radiobutton id ="rd" runat ="server" text ="m">

<asp:radiobutton id="rd" runat="server" text="m">

For Each row As GridViewRow In GridView2.Rows

        dim rb as RadioButton 

          rb = DirectCast(GridView2.Rows(row.RowIndex).FindControl("rb1"), RadioButton)  

          If rb .Checked = True Then
              Response.Clear()
              'here what we want to perporm tht code to write
              Response.Write("checked RadioButton:   " + Convert.ToString(row.RowIndex))
              'Else
              ' Response.Write("Not checked any RadioButton in grid")
          End If

      Next

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