Populate (Bind) Label from database based on QueryString using C# and VB.Net in ASP.Net

Hi George616,

Check this example. Now please take its reference and correct your code.

Database

I have made use of the following table Customers with the schema as follows.

I have already inserted few records in the table.

You can download the database table SQL by clicking the download link below.

Download SQL file

HTML

Default

<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="false" AllowPaging="true" PageSize="2"
    OnPageIndexChanging="OnPageIndexChanging" OnRowDataBound="OnRowDataBound" DataKeyNames="CustomerId"
    OnSelectedIndexChanged="OnSelectedIndexChanged">
    <EmptyDataTemplate>
        <div style="text-align: center; font-weight: bolder; font-size: medium;">
            <asp:Label ID="labelTemp" runat="server" Text="No Record"></asp:Label>
        </div>
    </EmptyDataTemplate>
    <Columns>
        <asp:BoundField DataField="Name" HeaderText="File Name" />
        <asp:BoundField DataField="Country" HeaderText="Country" />
    </Columns>
</asp:GridView>

Detail

Id:<asp:Label ID="lblId" runat="server" /><br />
Name:<asp:Label ID="lblName" runat="server" /><br />
Country:<asp:Label ID="lblCountry" runat="server" />

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#

Default

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

protected void OnRowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        e.Row.Attributes["onclick"] = Page.ClientScript.GetPostBackClientHyperlink(GridView1, "Select$" + e.Row.RowIndex);
        e.Row.ToolTip = "Click to select this row.";
    }
}

protected void OnSelectedIndexChanged(object sender, EventArgs e)
{
    foreach (GridViewRow row in GridView1.Rows)
    {
        if (row.RowIndex == GridView1.SelectedIndex)
        {
            Response.Redirect("Detail.aspx?Name=" + row.Cells[0].Text.Trim());
        }
    }
}

protected void OnPageIndexChanging(object sender, GridViewPageEventArgs e)
{
    GridView1.PageIndex = e.NewPageIndex;
    this.BindGrid();
}

private void BindGrid()
{
    string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
    string query = "SELECT * FROM Customers";
    using (SqlConnection con = new SqlConnection(conString))
    {
        SqlCommand cmd = new SqlCommand(query);
        using (SqlDataAdapter sda = new SqlDataAdapter())
        {
            cmd.Connection = con;
            sda.SelectCommand = cmd;
            using (DataTable dt = new DataTable())
            {
                sda.Fill(dt);
                if (dt.Rows.Count > 0)
                {
                    GridView1.DataSource = dt;
                    GridView1.DataBind();
                }
            }
        }
    }
}

Detail

protected void Page_Load(object sender, EventArgs e)
{
    if (!string.IsNullOrEmpty(Request.QueryString["Name"]))
    {
        string conString = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        string query = "SELECT * FROM Customers WHERE Name = @Name";
        using (SqlConnection con = new SqlConnection(conString))
        {
            SqlCommand cmd = new SqlCommand(query);
            using (SqlDataAdapter sda = new SqlDataAdapter())
            {
                cmd.Connection = con;
                sda.SelectCommand = cmd;
                cmd.Parameters.AddWithValue("@Name", Request.QueryString["Name"]);
                using (DataTable dt = new DataTable())
                {
                    sda.Fill(dt);
                    if (dt.Rows.Count > 0)
                    {
                        lblId.Text = dt.Rows[0]["CustomerId"].ToString();
                        lblName.Text = dt.Rows[0]["Name"].ToString();
                        lblCountry.Text = dt.Rows[0]["Country"].ToString();
                    }
                }
            }
        }
    }
}

VB.Net

Default

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

Protected Sub OnRowDataBound(ByVal sender As Object, ByVal e As GridViewRowEventArgs)
    If e.Row.RowType = DataControlRowType.DataRow Then
        e.Row.Attributes("onclick") = Page.ClientScript.GetPostBackClientHyperlink(GridView1, "Select$" & e.Row.RowIndex)
        e.Row.ToolTip = "Click to select this row."
    End If
End Sub

Protected Sub OnSelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
    For Each row As GridViewRow In GridView1.Rows
        If row.RowIndex = GridView1.SelectedIndex Then
            Response.Redirect("Detail.aspx?Name=" & row.Cells(0).Text.Trim())
        End If
    Next
End Sub

Protected Sub OnPageIndexChanging(ByVal sender As Object, ByVal e As GridViewPageEventArgs)
    GridView1.PageIndex = e.NewPageIndex
    Me.BindGrid()
End Sub

Private Sub BindGrid()
    Dim conString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
    Dim query As String = "SELECT * FROM Customers"
    Using con As SqlConnection = New SqlConnection(conString)
        Dim cmd As SqlCommand = New SqlCommand(query)
        Using sda As SqlDataAdapter = New SqlDataAdapter()
            cmd.Connection = con
            sda.SelectCommand = cmd
            Using dt As DataTable = New DataTable()
                sda.Fill(dt)
                If dt.Rows.Count > 0 Then
                    GridView1.DataSource = dt
                    GridView1.DataBind()
                End If
            End Using
        End Using
    End Using
End Sub

Detail

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not String.IsNullOrEmpty(Request.QueryString("Name")) Then
        Dim conString As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
        Dim query As String = "SELECT * FROM Customers WHERE Name = @Name"
        Using con As SqlConnection = New SqlConnection(conString)
            Dim cmd As SqlCommand = New SqlCommand(query)
            Using sda As SqlDataAdapter = New SqlDataAdapter()
                cmd.Connection = con
                sda.SelectCommand = cmd
                cmd.Parameters.AddWithValue("@Name", Request.QueryString("Name"))
                Using dt As DataTable = New DataTable()
                    sda.Fill(dt)
                    If dt.Rows.Count > 0 Then
                        lblId.Text = dt.Rows(0)("CustomerId").ToString()
                        lblName.Text = dt.Rows(0)("Name").ToString()
                        lblCountry.Text = dt.Rows(0)("Country").ToString()
                    End If
                End Using
            End Using
        End Using
    End If
End Sub

Screenshot