Pass (Send) value to other page using Session on ASP.Net GridView HyperLink Click using C# and VB.Net

Hi khaled2016,

Use LinkButton control and set the Session value on its Click event handler.

Refer below sample and correct your code.

HTML

Default.aspx

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false">
    <Columns>
        <asp:BoundField DataField="Id" HeaderText="CustomerId" />
        <asp:BoundField DataField="Name" HeaderText="Name" />
        <asp:TemplateField HeaderText="Name">
            <ItemTemplate>
                <asp:LinkButton ID="lnlNavigate" runat="server" OnClick="Redirect" Text='<%#Eval("Country") %>'></asp:LinkButton>
            </ItemTemplate>
        </asp:TemplateField>
    </Columns>
</asp:GridView>

Details.aspx

Country : <asp:Label ID="lblCountry" runat="server"></asp:Label>

Namespaces

C#

using System.Data;

VB.Net

Imports System.Data

Code

C#

Default.aspx.cs

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        DataTable dt = new DataTable();
        dt.Columns.AddRange(new DataColumn[3] { new DataColumn("Id"), new DataColumn("Name"), new DataColumn("Country") });
        dt.Rows.Add(1, "John Hammond", "United States");
        dt.Rows.Add(2, "Mudassar Khan", "India");
        dt.Rows.Add(3, "Suzanne Mathews", "France");
        dt.Rows.Add(4, "Robert Schidner", "Russia");
        GridView1.DataSource = dt;
        GridView1.DataBind();
    }
}

protected void Redirect(object sender, EventArgs e)
{
    LinkButton lnk = (sender) as LinkButton;
    GridViewRow row = (GridViewRow)lnk.NamingContainer;
    Session["Country"] = (row.FindControl("lnlNavigate") as LinkButton).Text;
    Response.Redirect("Details.aspx");
}

Details.aspx.cs

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        lblCountry.Text = Session["Country"].ToString();
    }
}

VB.Net

Default.aspx.vb

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        Dim dt As DataTable = New DataTable()
        dt.Columns.AddRange(New DataColumn(2) {New DataColumn("Id"), New DataColumn("Name"), New DataColumn("Country")})
        dt.Rows.Add(1, "John Hammond", "United States")
        dt.Rows.Add(2, "Mudassar Khan", "India")
        dt.Rows.Add(3, "Suzanne Mathews", "France")
        dt.Rows.Add(4, "Robert Schidner", "Russia")
        GridView1.DataSource = dt
        GridView1.DataBind()
    End If
End Sub

Protected Sub Redirect(ByVal sender As Object, ByVal e As EventArgs)
    Dim lnk As LinkButton = TryCast((sender), LinkButton)
    Dim row As GridViewRow = CType(lnk.NamingContainer, GridViewRow)
    Session("Country") = (TryCast(row.FindControl("lnlNavigate"), LinkButton)).Text
    Response.Redirect("Details.aspx")
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
        lblCountry.Text = Session("Country").ToString()
    End If
End Sub

Screenshot