Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridViewRow' and 'int' : The Official Microsoft ASP.NET Forums

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Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridViewRo...

Feb 22, 2012 03:57 PM|LINK

I want assign selected grid cell value to the respected textbox in this case i written only one txtbox that is txtFistName

my problem is when i grid edit button it will not assigning the value to the txtbox

could you please help me some body :Here is cs code below

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Data.SqlClient;
public partial class Default8 : System.Web.UI.Page
{
    public DataSet EmployeeDetailes
    {
        get
        {
            if (ViewState["EmployeeDetailes"] == null)
            {
                DataSet ds = new DataSet();
                DataTable dt = new DataTable();
                dt.Columns.Add("ID", Type.GetType("System.Int32"));
                dt.Columns.Add("First Name", Type.GetType("System.String"));
                dt.Columns.Add("Last Name", Type.GetType("System.String"));
                dt.Columns.Add("Gender", Type.GetType("System.String"));
                dt.Columns.Add("Salary", Type.GetType("System.Int32"));
                dt.Columns.Add("Contact Number", Type.GetType("System.Int64"));
                dt.Rows.Add(1, "Ramesh", "Radam", "Mail", 18000, 9030282001);
                dt.Rows.Add(1, "Satya", "Radam", "Mail", 18000, 9030282001);
                ds.Tables.Add(dt);
            }
            return (DataSet)ViewState["EmployeeDetailes"];
        }
        set
        {
            ViewState["EmployeeDetailes"] = value;
        }
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindData();
        }


    }

    private void BindData()
    {
        DataSet ds = new DataSet();
        DataTable dt = new DataTable();
        dt.Columns.Add("ID", Type.GetType("System.Int32"));
        dt.Columns.Add("FirstName", Type.GetType("System.String"));
        dt.Columns.Add("LastName", Type.GetType("System.String"));
        dt.Columns.Add("Gender", Type.GetType("System.String"));
        dt.Columns.Add("Salary", Type.GetType("System.Int32"));
        dt.Columns.Add("ContactNO", Type.GetType("System.Int64"));
        dt.Rows.Add(1, "Ramesh", "Radam", "Mail", 18000, 9030282001);
        dt.Rows.Add(1, "Satya", "Radam", "Mail", 18000, 9030282001);
        ds.Tables.Add(dt);
        gdvCustomerDetailes.DataSource = ds;
        gdvCustomerDetailes.DataBind();
    }


    protected void gdvCustomerDetailes_RowEditing(object sender, GridViewEditEventArgs e)
    {
        gdvCustomerDetailes.EditIndex = e.NewEditIndex;
        BindData();
        if (gdvCustomerDetailes.SelectedRow != -1)//*here iam gettin this error:Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridViewRow' and 'int'*//

        {
            if (gdvCustomerDetailes.SelectedRow.Cells[0] != null)
            {
                txtFirstName.Text = gdvCustomerDetailes.SelectedRow.Cells[0].Text;
            }
        }
    }

    protected void gdvCustomerDetailes_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        gdvCustomerDetailes.EditIndex = -1;
        BindData();
        txtFirstName.Text = "";
    }
}

Here is MY aspxcode

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default8.aspx.cs" Inherits="Default8"
    EnableViewState="false" %>

<!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>Untitled Page</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table width="890px">
            <tr>
                <td>
                    <asp:Panel ID="pnlCustomerDetailes" runat="server">
                        <table width="890px">
                            <tr>
                                <td style="background-color: Blue; width: 1px">
                                    <asp:Image ID="Image1" Height="1px" ImageUrl="~/ramesh.gif" runat="server" />
                                </td>
                                <td>
                                    <table width="890px">
                                        <tr style="background-color: Blue">
                                            <td colspan="4">
                                                <asp:Label ID="Label1" runat="server" Text="CustomerDetailes" ForeColor="White"></asp:Label>
                                            </td>
                                        </tr>
                                        <tr>
                                            <td>
                                                <asp:Label ID="lblFirstName" runat="server" Text="FirstName"></asp:Label>
                                            </td>
                                            <td>
                                                <asp:TextBox ID="txtFirstName" runat="server"></asp:TextBox>
                                            </td>
                                            <td>
                                                <asp:Label ID="lblLastName" runat="server" Text="LastName"></asp:Label>
                                            </td>
                                            <td>
                                                <asp:TextBox ID="txtLastName" runat="server"></asp:TextBox>
                                            </td>
                                        </tr>
                                        <tr>
                                            <td>
                                                <asp:Label ID="lblGender" runat="server" Text="Gender"></asp:Label>
                                            </td>
                                            <td>
                                                <asp:RadioButtonList ID="RadioButtonList1" RepeatDirection="Horizontal" runat="server">
                                                    <asp:ListItem Text="Male" Value="1"></asp:ListItem>
                                                    <asp:ListItem Text="FeMale" Value="2"></asp:ListItem>
                                                </asp:RadioButtonList>
                                            </td>
                                            <td>
                                            </td>
                                            <td>
                                            </td>
                                        </tr>
                                        <tr>
                                            <td>
                                                <asp:Label ID="lblSalary" runat="server" Text="Salary"></asp:Label>
                                            </td>
                                            <td>
                                                <asp:TextBox ID="txtSalary" runat="server"></asp:TextBox>
                                            </td>
                                            <td>
                                            </td>
                                            <td>
                                            </td>
                                        </tr>
                                        <tr>
                                            <td>
                                                <asp:Label ID="lblContactNO" runat="server" Text="ContactNO"></asp:Label>
                                            </td>
                                            <td>
                                                <asp:TextBox ID="txtContactNo" runat="server"></asp:TextBox>
                                            </td>
                                            <td>
                                            </td>
                                            <td>
                                            </td>
                                        </tr>
                                    </table>
                                </td>
                                <td style="background-color: Blue; width: 1px">
                                    <asp:Image ID="Image2" Height="1px" ImageUrl="~/ramesh.gif" runat="server" />
                                </td>
                            </tr>
                            <tr style="background-color: Blue">
                                <td colspan="3" style="height: 1px">
                                </td>
                            </tr>
                        </table>
                    </asp:Panel>
                </td>
            </tr>
            <tr>
                <td style="height: 5px">
                </td>
            </tr>
            <tr>
                <td>
                    <asp:GridView ID="gdvCustomerDetailes" AutoGenerateColumns="False" runat="server"
                        Font-Size="14px" Font-Names="Arial,Helvertica,scans-seif" HeaderStyle-BackColor="Blue"
                        HeaderStyle-ForeColor="White" Width="890px" 
                        onrowediting="gdvCustomerDetailes_RowEditing" 
                        onrowcancelingedit="gdvCustomerDetailes_RowCancelingEdit" >
                        <Columns>
                            <asp:BoundField DataField="ID" HeaderText="CustomerID" ItemStyle-HorizontalAlign="Center" />
                            <asp:BoundField DataField="FirstName" HeaderText="FirstName" ItemStyle-HorizontalAlign="Center" />
                            <asp:BoundField DataField="LastName" HeaderText="LastName" ItemStyle-HorizontalAlign="Center" />
                            <asp:BoundField DataField="Gender" HeaderText="Gender" ItemStyle-HorizontalAlign="Center" />
                            <asp:BoundField DataField="Salary" HeaderText="Salary" ItemStyle-HorizontalAlign="Center" />
                            <asp:BoundField DataField="ContactNO" HeaderText="ContactNO" ItemStyle-HorizontalAlign="Center" />
                            <asp:CommandField ShowEditButton="true" />
                        </Columns>
                        <HeaderStyle BackColor="Blue" ForeColor="White"></HeaderStyle>
                    </asp:GridView>
                </td>
            </tr>
        </table>
    </div>
    </form>
</body>
</html>

Reply

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

Feb 22, 2012 04:30 PM|LINK

gdvCustomerDetailes.SelectedRow

will give you the current row.. You are Trying to comapare the currentRow Object directly with a int value which is wrong. You need to compare the index of the Row and not the Row Object directly.

Instead of

if (gdvCustomerDetailes.SelectedRow != -1)
{ 
    // Your code here
}

////  Try This  one


if(e.NewEditIndex !=  -1)
{
   // Your code here
}

Edited by sushanth009 on Feb 22, 2012 04:37 PM

Reply

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

Feb 22, 2012 04:34 PM|LINK

A GridView.SelectedRow is not an integer. It's a row.

Are you trying to test SelectedIndex, instead? That's -1 if no row is selected, the selected row index otherwise.

Edited by KathyW on Feb 22, 2012 05:09 PM

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Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

Feb 23, 2012 03:25 AM|LINK

Hi

Hello,sushanth

thanks for reply to me

i tried above code iam getting Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

the place in code here

if (e.NewEditIndex != -1)

        {
            
            if (gdvCustomerDetailes.SelectedRow.Cells[0]!=null)
//this place Error:Object reference not set to an instance of an object.

            {
               

                txtFirstName.Text = gdvCustomerDetailes.SelectedRow.Cells[0].Text;
            }

and also i try inthis way also iam getting same error:

if (e.NewEditIndex != -1) 

        {
            
                          

                txtFirstName.Text = gdvCustomerDetailes.SelectedRow.Cells[0].Text;
            
        }

when i debugging step into

gdvCustomerDetailes.SelectedRow"":showing null value

how to handile it ,coluld you please help me

i will wait for your replay

Thank you

Reply

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

Feb 23, 2012 03:32 AM|LINK

Hi

Hello kathyw

Thanks for replying to me

Could you please suggest me the code,where i need to change the code and how

Reply

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

Feb 23, 2012 03:54 AM|LINK

Simply replace your existing code with my replacement, SelectedIndex instead of SelectedRow, in the line that is throwing the error.

Edited by ramesh.radam on Feb 24, 2012 04:24 AM
Edited by ramesh.radam on Feb 24, 2012 04:24 AM

Reply

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

Feb 23, 2012 03:33 PM|LINK

Replace selectedRow in your code with this and see if you see the same error.

///Instead of this ..
if (e.NewEditIndex != -1)
{
  if (gdvCustomerDetailes.SelectedRow.Cells[0]!=null)
  {
      txtFirstName.Text = dvCustomerDetailes.SelectedRow.Cells[0].Text;
  }


if (e.NewEditIndex != -1)
{
   txtFirstName.Text = gdvCustomerDetailes.SelectedRow.Cells[0].Text;
 }

 /////Try This
if (e.NewEditIndex != -1)
{
  if (gdvCustomerDetailes.Rows[e.NewEditIndex].Cells[0]!=null)
  {
      txtFirstName.Text = dvCustomerDetailes.Rows[e.NewEditIndex].Cells[0].Text;
  }


if (e.NewEditIndex != -1)
{
   txtFirstName.Text = gdvCustomerDetailes.Rows[e.NewEditIndex].Cells[0].Text;
        }

This should take care of the error for you.

Marked as answer by ramesh.radam on Feb 24, 2012 04:24 AM

Reply

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

Feb 24, 2012 04:44 AM|LINK

Hi

Hello sushanth , thanks to reply to me with answers. what ever you suggest code working currectly and not showing any errors also

but small problem the value not comming to the txtbox:FirstName

when iam in debugging step in to the place:txtFirstName.Text = dvCustomerDetailes.Rows[e.NewEditIndex].Cells[0].Text;""value is empty null so the txtFirst name receiving null value so the cell value not comming into txtbox.

when iam direclty putting row nomberEx;1 in place of Rows[1] :-

txtFirstName.Text = gdvCustomerDetailes.Rows[1].Cells[1].Text;

txtbox:txtFirstName receiving value of row:

dt.Rows.Add(2, "Satya", "Radam", "Mail", 10, 9030282001); txtFistName :satya

Would you please suggest me to write code

Reply

sushanth009

Contributor

6243 Points

1168 Posts

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

Feb 24, 2012 03:02 PM|LINK

What do you have in the first column

Cells[0] ..

I think you have the FirstName in Cells[1]. .. What does your .aspx side of the Gridview Look like..

Reply

ramesh.radam

Member

56 Points

85 Posts

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

Feb 24, 2012 08:10 PM|LINK

Hai

Hello sushanth

Cell[0]represents:CoustomerID that is 2 in case of row:-

dt.Rows.Add(2, "Satya", "Radam", "Mail", 10, 9030282001);

my program is the Gride has 3 rows of data that is:

        dt.Rows.Add(1, "Ra", "hari", "Female", 18000, 9030282001);
        dt.Rows.Add(2, "Satya", "Radam", "Mail", 10, 9030282001);
        dt.Rows.Add(3, "xx", "badam", "Femail", 18000, 9030282001);

these rows are  Bind to grid and result is comming and grid showing tablegrid showing

1, "Ra", "hari", "Female", 18000, 9030282001 -Edit

2, "Satya", "Radam", "Mail", 10, 9030282001-Edit

3, "xx", "badam", "Femail", 18000, 9030282001 -Edit

these data in grid when iam click on edit button in First row asper code written the value:" ra" must me store in txtbox:txtFirstName

but problem here in my program the value :"ra" not comming to the txtbox it is showing empty

when iam giving row index directly set:

Rows[1] :at place

txtFirstName.Text = gdvCustomerDetailes.Rows[1].Cells[0].Text;

the second row "satya" is assing to txtFirstName correctly

but for Row[0] or Row[e.NewIndex]  the txtFirstName receiving empty

Look compleat code once

public partial class Default8 : System.Web.UI.Page
{
    public DataSet EmployeeDetailes
    {
        get
        {
            if (ViewState["EmployeeDetailes"] == null)
            {
                DataSet ds = new DataSet();
                DataTable dt = new DataTable();
                dt.Columns.Add("ID", Type.GetType("System.Int32"));
                dt.Columns.Add("First Name", Type.GetType("System.String"));
                dt.Columns.Add("Last Name", Type.GetType("System.String"));
                dt.Columns.Add("Gender", Type.GetType("System.String"));
                dt.Columns.Add("Salary", Type.GetType("System.Int32"));
                dt.Columns.Add("Contact Number", Type.GetType("System.Int64"));
                dt.Rows.Add(1, "Ramesh", "Radam", "Mail", 18000, 9030282001);
                dt.Rows.Add(1, "Satya", "Radam", "Mail", 18000, 9030282001);
                ds.Tables.Add(dt);
            }
            return (DataSet)ViewState["EmployeeDetailes"];
        }
        set
        {
            ViewState["EmployeeDetailes"] = value;
        }
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindData();
        }


    }

    private void BindData()
    {
        DataSet ds = new DataSet();
        DataTable dt = new DataTable();
        dt.Columns.Add("ID", Type.GetType("System.Int32"));
        dt.Columns.Add("FirstName", Type.GetType("System.String"));
        dt.Columns.Add("LastName", Type.GetType("System.String"));
        dt.Columns.Add("Gender", Type.GetType("System.String"));
        dt.Columns.Add("Salary", Type.GetType("System.Int32"));
        dt.Columns.Add("ContactNO", Type.GetType("System.Int64"));
        dt.Rows.Add(1, "Ra", "hari", "Female", 18000, 9030282001);
        dt.Rows.Add(2, "Satya", "Radam", "Mail", 10, 9030282001);
        dt.Rows.Add(3, "xx", "badam", "Femail", 18000, 9030282001);
        ds.Tables.Add(dt);
        gdvCustomerDetailes.DataSource = ds;
        gdvCustomerDetailes.DataBind();
    }


    protected void gdvCustomerDetailes_RowEditing(object sender, GridViewEditEventArgs e)
    {
        gdvCustomerDetailes.EditIndex = e.NewEditIndex;
        BindData();
        if (e.NewEditIndex != -1)
        {
            if (gdvCustomerDetailes.Rows[e.NewEditIndex].Cells[0] != null)
            {
               
                txtFirstName.Text = gdvCustomerDetailes.Rows[e.NewEditIndex].Cells[2].Text;
            }

        }


          }

    protected void gdvCustomerDetailes_RowCancelingEdit(object sender, GridViewCancelEditEventArgs e)
    {
        gdvCustomerDetailes.EditIndex = -1;
        BindData();
        txtFirstName.Text = "";
    }
}

I will wait for you reply

Thank you

Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridViewRow' and 'int' RSS

11 replies

ramesh.radam

Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridViewRo...

sushanth009

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

KathyW

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

ramesh.radam

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

ramesh.radam

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

KathyW

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

sushanth009

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

ramesh.radam

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

sushanth009

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

ramesh.radam

Re: Error 1 Operator '!=' cannot be applied to operands of type 'System.Web.UI.WebControls.GridVi...

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