Send (Pass) value from GridView to another page TextBox using C# and VB.Net in ASP.Net

Hi indradeo,

Check this sample. now take its reference and correct your code.

Database

For this example I have used of Northwind database that you can download using the link given below.

Download Northwind Database

HTML

Page1.aspx

<asp:GridView ID="gvCustomers" runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="CustomerID" HeaderText="Customer ID" />
        <asp:BoundField DataField="ContactName" HeaderText="Name" />
        <asp:BoundField DataField="City" HeaderText="City" />
        <asp:BoundField DataField="Country" HeaderText="Country" />
        <asp:TemplateField>
            <ItemTemplate>
                <asp:Button ID="btnDetail" Text="Get Details" runat="server" OnClick="OnGetDetails" />
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Details.aspx

<table>
    <tr>
        <td colspan="2" align="center">Customer Details</td>
    </tr>
    <tr>
        <td>Customer ID</td>
        <td><asp:TextBox ID="txtID" runat="server" /></td>
    </tr>
    <tr>
        <td>Name</td>
        <td><asp:TextBox ID="txtName" runat="server" /></td>
    </tr>
    <tr>
        <td>City</td>
        <td><asp:TextBox ID="txtCity" runat="server" /></td>
    </tr>
    <tr>
        <td>Country</td>
        <td><asp:TextBox ID="txtCountry" runat="server" /></td>
    </tr>
</table>

Namespaces

C#

using System.Configuration;
using System.Data;
using System.Data.SqlClient;

VB.Net

Imports System.Configuration
Imports System.Data
Imports System.Data.SqlClient

Code

C#

Page1.cs

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

protected void OnGetDetails(object sender, EventArgs e)
{
    GridViewRow row = ((sender as Button).NamingContainer as GridViewRow);
    string customerID = row.Cells[0].Text;
    string name = row.Cells[1].Text;
    string city = row.Cells[2].Text;
    string country = row.Cells[3].Text;
    Response.Redirect("Details.aspx?CustomerID=" + customerID + "&Name=" + name + "&City=" + city + "&Country=" + country);
}

private void BindCustomers()
{
    using (SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["constr"].ConnectionString))
    {
        using (SqlCommand cmd = new SqlCommand("SELECT TOP 10 CustomerID,ContactName,City,Country FROM Customers", con))
        {
            cmd.CommandType = CommandType.Text;
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                sda.SelectCommand = cmd;
                DataTable dt = new DataTable();
                sda.Fill(dt);
                this.gvCustomers.DataSource = dt;
                this.gvCustomers.DataBind();
            }
        }
    }
}

Details.cs

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        txtID.Text = Request.QueryString["CustomerID"];
        txtName.Text = Request.QueryString["Name"];
        txtCity.Text = Request.QueryString["City"];
        txtCountry.Text = Request.QueryString["Country"];
    }
}

VB.Net

Page1.asx.vb

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Me.BindCustomers()
    End If
End Sub

Protected Sub OnGetDetails(ByVal sender As Object, ByVal e As EventArgs)
    Dim row As GridViewRow = (TryCast((TryCast(sender, Button)).NamingContainer, GridViewRow))
    Dim customerID As String = row.Cells(0).Text
    Dim name As String = row.Cells(1).Text
    Dim city As String = row.Cells(2).Text
    Dim country As String = row.Cells(3).Text
    Response.Redirect("Details.aspx?CustomerID=" & customerID & "&Name=" & name & "&City=" & city & "&Country=" & country)
End Sub

Private Sub BindCustomers()
    Using con As SqlConnection = New SqlConnection(ConfigurationManager.ConnectionStrings("constr").ConnectionString)
        Using cmd As SqlCommand = New SqlCommand("SELECT TOP 10 CustomerID,ContactName,City,Country FROM Customers", con)
            cmd.CommandType = CommandType.Text
            Using sda As SqlDataAdapter = New SqlDataAdapter()
                sda.SelectCommand = cmd
                Dim dt As DataTable = New DataTable()
                sda.Fill(dt)
                Me.gvCustomers.DataSource = dt
                Me.gvCustomers.DataBind()
            End Using
        End Using
    End Using
End Sub

Details.aspx.vb

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        txtID.Text = Request.QueryString("CustomerID")
        txtName.Text = Request.QueryString("Name")
        txtCity.Text = Request.QueryString("City")
        txtCountry.Text = Request.QueryString("Country")
    End If
End Sub

Screenshot