How to get values in gridview

Question

1.00/5 (1 vote)

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i am using following code to generate gridview.

C#

protected void Page_Load(object sender, EventArgs e)
     {
         if (!this.IsPostBack)
         {
             this.BindGrid();
         }
     }

     private void BindGrid()
     {
         Entities entities = new Entities();


         Gridview1.DataSource = from customer in entities.SectorWisePoints.ToList()
                                    select customer;

         Gridview1.DataBind();

     }
     //protected void gridView_PreRender(object sender, EventArgs e)
     //{
     //    GridDecorator.MergeRows(Gridview1);
     //}
     protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
     {
         if (e.Row.RowType == DataControlRowType.DataRow)
         {

             CheckBox CHKBOX = (e.Row.FindControl("Released") as CheckBox);
             CheckBox CHKBOX1 = (e.Row.FindControl("Released1") as CheckBox);
                 DropDownList ddlEmployee = (e.Row.FindControl("ddlEmp") as DropDownList);
                 DropDownList ddlEmployee2 = (e.Row.FindControl("ddlEmp2") as DropDownList);
                 var emp1 = _service.GetEmployeeDutyByEmployee_Id(MyUser.Employee_Id).LastOrDefault();
                 var EmpList = _service.GetAllEmployeeDuty().OrderByDescending(x => x.EndDate).GroupBy(x => x.Employee_Id).Select(x => x.First()).ToList();
                 var empList = EmpList.Where(X => X.ToSector_Id == emp1.ToSector_Id).ToList();
                 ddlEmployee.Bind(empList, "EmployeeIdName", "Employee_Id");
                 ddlEmployee2.Bind(empList, "EmployeeIdName", "Employee_Id");





         }
     }

aspx code is

ASP.NET

<asp:GridView ID="Gridview1" ControlStyle-BackColor="#ccccff" CssClass="col-sm-10" runat="server"   AutoGenerateColumns="false" OnRowDataBound="OnRowDataBound" 
                        >
                        <Columns>
                            
                            <asp:TemplateField HeaderText="PointName">
                                <ItemTemplate>
                                    <asp:Label ID="lblPointName"  runat="server" Text='<%# Eval("Name")%>'> ></asp:Label>
                                </ItemTemplate>
                            </asp:TemplateField>    
                            <asp:TemplateField HeaderText="Employee">
                                <ItemTemplate>
                                    <asp:DropDownList ID="ddlEmp" runat="server" OnSelectedIndexChanged="ddlEmp_SelectedIndexChanged" AutoPostBack="true"></asp:DropDownList>
                                </ItemTemplate>
                            </asp:TemplateField>
                             <asp:TemplateField HeaderText="Released">
                                <ItemTemplate>
                                    <asp:CheckBox  runat="server" ID="Released"/>
                                </ItemTemplate>                                
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="PointName">
                                <ItemTemplate>
                                    <asp:Label ID="lblPointName1"  runat="server" Text='<%# Eval("Name")%>'>></asp:Label>
                                </ItemTemplate>
                            </asp:TemplateField>  
                             <asp:TemplateField HeaderText="Employee">
                                <ItemTemplate>
                                    <asp:DropDownList ID="ddlEmp2" runat="server" OnSelectedIndexChanged="ddlEmp_SelectedIndexChanged" AutoPostBack="true"></asp:DropDownList>
                                </ItemTemplate>
                                
                            </asp:TemplateField>
                            <asp:TemplateField HeaderText="Released">
                                <ItemTemplate>
                                    <asp:CheckBox  runat="server" ID="Released1"/>
                                </ItemTemplate>
                                
                            </asp:TemplateField>
                        </Columns>
                    </asp:GridView>

i want to save point name and selected employee on this selected event ,but i am unable to gat values,i am trying following code ,its give exception

C#

protected void ddlEmp_SelectedIndexChanged(object sender, EventArgs e)
   {
       DropDownList ddl1 = (DropDownList)Gridview1.FindControl("ddlEmp");
       string Emp1 = ((DropDownList)Gridview1.SelectedRow.FindControl("ddlEmp")).SelectedItem.Value;
       string Emp2 = ((DropDownList)Gridview1.SelectedRow.FindControl("ddlEmp")).SelectedItem.Value;
       string pointname = ((Label)Gridview1.SelectedRow.FindControl("lblPointName")).Text;
       string pointname1 = ((Label)Gridview1.SelectedRow.FindControl("lblPointName")).Text;
   }

[edit]SHOUTING removed - OriginalGriff[/edit]

Posted 14-Sep-15 23:15pm

Sajid227

Updated 14-Sep-15 23:33pm

OriginalGriff

v2

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Comments

Naveen.Sanagasetti 15-Sep-15 5:33am

Share your exception details instead of post your full code; that will help you to get more responses from our end.

OriginalGriff 15-Sep-15 5:33am

DON'T SHOUT. Using all capitals is considered shouting on the internet, and rude (using all lower case is considered childish). Use proper capitalization if you want to be taken seriously.

2 solutions

Solution 2

Try the given below code-

protected void ddlEmp_SelectedIndexChanged(object sender, EventArgs e)
{
GridViewRow gvRow = ((GridViewRow)((DropDownList)sender).NamingContainer);
            DropDownList ddlEmp = gvRow.FindControl("ddlEmp") as DropDownList;
}

Posted 15-Sep-15 2:44am

Madhu Nair

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Richard Deeming · Accepted Answer · 2015-09-15T02:35:00

I'm guessing, since you haven't posted the exception details, that you're getting a NullReferenceException when you call GridView1.SelectedRow.FindControl(...); your grid doesn't have a selected row, so you're trying to call a method on a null reference.

Try using the sender parameter to get the parent row, and find your controls from there:

C#

protected void ddlEmp_SelectedIndexChanged(object sender, EventArgs e)
{
    Control row = ((Control)sender).NamingContainer;
    
    DropDownList ddlEmp = (DropDownList)row.FindControl("ddlEmp");
    DropDownList ddlEmp2 = (DropDownList)row.FindControl("ddlEmp2");
    Label lblPointName = (Label)ddlEmp.NamingContainer.FindControl("lblPointName");
    Label lblPointName1 = (Label)ddlEmp.NamingContainer.FindControl("lblPointName1");
    
    string Emp1 = ddlEmp.SelectedValue;
    string Emp2 = ddlEmp2.SelectedValue;
    string pointname = lblPointName.Text;
    string pointname1 = lblPointName1.Text;
    
    ...
}

If that doesn't solve the problem, then you'll need to post the full details of the exception you're getting.