Show Hide ASP.Net Panel based on Button Clicked using C# and VB.Net

Hey BubunDash,

Please refer below sample.

HTML

C#

<asp:Button ID="Button1" Text="UserLogin" runat="server" OnClick="UserLogin" /><br />
<br />
<asp:Button ID="Button2" Text="AdminLogin" runat="server" OnClick="AdminLogin" /><br />
<asp:Panel runat="server" ID="PanelUser">
    <asp:Label Text="UserName" runat="server" ID="lblUserName" />
    <asp:TextBox runat="server" ID="Text_UserName" />
    <asp:Label ID="lblUserPass" Text="UserPassword" runat="server" />
    <asp:TextBox runat="server" ID="Text_Password" />
</asp:Panel>
<asp:Panel runat="server" ID="PanelAdmin">
    <asp:Label ID="lblAdminName" Text="AdminName" runat="server" />
    <asp:TextBox runat="server" ID="Text_AdminUserName" />
    <asp:Label ID="lblAdminPassword" Text="AdminPassword" runat="server" />
    <asp:TextBox runat="server" ID="Text_AdminPassword" />
</asp:Panel>

Namespaces

C#

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

VB.Net

Imports System.Data.SqlClient

Code

C#

protected void Page_Load(object sender, EventArgs e)
{
    if (!this.IsPostBack)
    {
        PanelUser.Visible = false;
        PanelAdmin.Visible = false;
    }
}
protected void UserLogin(object sender, EventArgs e)
{
    string name = Text_UserName.Text;
    string password = Text_Password.Text;
    if (!string.IsNullOrEmpty(name) && !string.IsNullOrEmpty(password))
    {
        string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlCommand cmd = new SqlCommand("SELECT Name, Country FROM Customers WHERE Name =@Name AND Country = @Country", con))
            {
                cmd.Parameters.AddWithValue("@Name", name);
                cmd.Parameters.AddWithValue("@Country", password);
                con.Open();
                string value = Convert.ToString(cmd.ExecuteScalar());
                if (!string.IsNullOrEmpty(value))
                {
                    //User Panel
                    Response.Redirect("Default.aspx");
                }
                else
                {
                    Text_UserName.Focus();
                    Text_UserName.BackColor = System.Drawing.Color.Yellow;
                }
                con.Close();
            }
        }
    }
    else
    {
        PanelUser.Visible = true;
    }
}

protected void AdminLogin(object sender, EventArgs e)
{
    string name = Text_AdminUserName.Text;
    string password = Text_AdminPassword.Text;
    if (!string.IsNullOrEmpty(name) && !string.IsNullOrEmpty(password))
    {
        string constr = ConfigurationManager.ConnectionStrings["constr"].ConnectionString;
        using (SqlConnection con = new SqlConnection(constr))
        {
            using (SqlCommand cmd = new SqlCommand("SELECT Name, Country FROM Customers WHERE Name =@Name AND Country = @Country", con))
            {
                cmd.Parameters.AddWithValue("@Name", name);
                cmd.Parameters.AddWithValue("@Country", password);
                con.Open();
                string value = Convert.ToString(cmd.ExecuteScalar());
                if (!string.IsNullOrEmpty(value))
                {
                    //Admin Panel
                    Response.Redirect("Admin.aspx");
                }
                else
                {
                    Text_AdminUserName.Focus();
                    Text_AdminUserName.BackColor = System.Drawing.Color.Yellow;
                }
                con.Close();
            }
        }
    }
    else
    {
        PanelAdmin.Visible = true;
    }
}

VB.Net

Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles Me.Load
    If Not Me.IsPostBack Then
        PanelUser.Visible = False
        PanelAdmin.Visible = False
    End If
End Sub

Protected Sub UserLogin(ByVal sender As Object, ByVal e As EventArgs)
    Dim name As String = Text_UserName.Text
    Dim password As String = Text_Password.Text

    If Not String.IsNullOrEmpty(name) AndAlso Not String.IsNullOrEmpty(password) Then
        Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
        Using con As SqlConnection = New SqlConnection(constr)
            Using cmd As SqlCommand = New SqlCommand("SELECT Name, Country FROM Customers WHERE Name =@Name AND Country = @Country", con)
                cmd.Parameters.AddWithValue("@Name", name)
                cmd.Parameters.AddWithValue("@Country", password)
                con.Open()
                Dim value As String = Convert.ToString(cmd.ExecuteScalar())
                If Not String.IsNullOrEmpty(value) Then
                    Response.Redirect("Default.aspx")
                Else
                    Text_UserName.Focus()
                    Text_UserName.BackColor = System.Drawing.Color.Yellow
                End If

                con.Close()
            End Using
        End Using
    Else
        PanelUser.Visible = True
    End If
End Sub

Protected Sub AdminLogin(ByVal sender As Object, ByVal e As EventArgs)
    Dim name As String = Text_AdminUserName.Text
    Dim password As String = Text_AdminPassword.Text
    If Not String.IsNullOrEmpty(name) AndAlso Not String.IsNullOrEmpty(password) Then
        Dim constr As String = ConfigurationManager.ConnectionStrings("constr").ConnectionString
        Using con As SqlConnection = New SqlConnection(constr)
            Using cmd As SqlCommand = New SqlCommand("SELECT Name, Country FROM Customers WHERE Name =@Name AND Country = @Country", con)
                cmd.Parameters.AddWithValue("@Name", name)
                cmd.Parameters.AddWithValue("@Country", password)
                con.Open()
                Dim value As String = Convert.ToString(cmd.ExecuteScalar())

                If Not String.IsNullOrEmpty(value) Then
                    Response.Redirect("Admin.aspx")
                Else
                    Text_AdminUserName.Focus()
                    Text_AdminUserName.BackColor = System.Drawing.Color.Yellow
                End If

                con.Close()
            End Using
        End Using
    Else
        PanelAdmin.Visible = True
    End If
End Sub

Screenshot