C# code for Ajax tabContainer using girdview inside panel, one button outside of panel

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C#

ASP.NET

Ajax-toolkit

Hi, I'm new to this site and new to programming.

I'm stuck in C# coding here. I've Googled so many times but decided to post a question here.
I'm creating Admin Panel using Ajax tab container which has 5 tapPanels and in that each tapPanel, I have one Panel from standard tool. And in that each Panel, I have GridView to show added data. And finally, I have one Add button outside of the Ajax tabContainer. I'll post the design if it allows. The problem is, I don't know the coding for tabContainer. I've created 10 methods so I can call it when Add button clicks.

Here is my code which is not working. Thanks in advance!!!

namespace Admin_Panel
{
    public partial class add : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Session["Page"] = "ADD";           
        }

        
        protected void btnAddCat_Click(object sender, EventArgs e)
        {
            AjaxControlToolkit.TabContainer container = (AjaxControlToolkit.TabContainer)TabConAddInfo;
            AjaxControlToolkit.TabPanel tcTabPanel = new AjaxControlToolkit.TabPanel();

            if (tcTabPanel.HeaderText == "Splash")
            {
                addSplash();
                lblMsgAdd.Text = "Added successfully";
            }
            else if (tcTabPanel.HeaderText == "Main Category")
            {
                addMainCat();
                lblMsgAdd.Text = "Added successfully";
            }
            else if (tcTabPanel.HeaderText == "Sub Category")
            {
                addSubCat();
                lblMsgAdd.Text = "Added successfully";
            }
            else if (tcTabPanel.HeaderText == "Business Contact")
            {
                addBusinessContact();
                lblMsgAdd.Text = "Added successfully";
            }
            else if (tcTabPanel.HeaderText == "Person Contact")
            {
                addPersonContact();
                lblMsgAdd.Text = "Added successfully";
            }
            
        }

       Int32 fileLength = 0;
       string connStr = WebConfigurationManager.ConnectionStrings["connection"].ConnectionString;

        private void addSplash()
        {
            HttpPostedFile uploadFile = FileLogo.PostedFile;
            fileLength = uploadFile.ContentLength;

            if (fileLength == 0)
            {
                string filePath = Server.MapPath(@"\style\img\no-photo-icon.jpg");
                string fileName = Path.GetFileName(filePath);

                FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read);
                fileLength = (Int32)fs.Length;
                Byte[] fileByteArr = new Byte[fileLength];
                fs.Read(fileByteArr, 0, fileLength);
                 
                SqlConnection conn = new SqlConnection(connStr);
                SqlCommand cmd = new SqlCommand("insert into SPLASH (VersionNumber, SplashLabel,LoginID) values (@VersionNumber,@SplashLabel,@LoginID)", conn);

                cmd.Parameters.AddWithValue("@VersionNumber", txtVnum.Value);
                cmd.Parameters.AddWithValue("@SplashLabel", txtSpLabel.Value);
                cmd.Parameters.AddWithValue("@LoginID", txtYourID.Value);
                cmd.Parameters.AddWithValue("@ImageData", fileByteArr);
                cmd.Parameters.AddWithValue("@ImageContentType", "image/jpg");
                cmd.Parameters.AddWithValue("@ImageSize", fileLength);

                conn.Open();
                cmd.ExecuteNonQuery();
                conn.Close();
                conn.Dispose();
                cmd.Dispose();

            }
            else
            {
                Byte[] fileByteArray = new Byte[fileLength];
                Stream streamObject = uploadFile.InputStream;
                streamObject.Read(fileByteArray, 0, fileLength);

                SqlConnection conn = new SqlConnection(connStr);
                <code>SqlCommand cmd = new SqlCommand("insert into SPLASH (VersionNumber, SplashLabel,LoginID) values (@VersionNumber,@SplashLabel,@LoginID)", conn);</code>

                cmd.Parameters.AddWithValue("@VersionNumber", txtVnum.Value);
                cmd.Parameters.AddWithValue("@SplashLabel", txtSpLabel.Value);
                cmd.Parameters.AddWithValue("@LoginID", txtYourID.Value);
                cmd.Parameters.AddWithValue("@ImageData", fileByteArray);
                cmd.Parameters.AddWithValue("@ImageContentType", "image/jpg");
                cmd.Parameters.AddWithValue("@ImageSize", fileLength);


                conn.Open();
                cmd.ExecuteNonQuery();
                conn.Close();
                conn.Dispose();
                cmd.Dispose();
            }
        }

        private void showSplash()
        {
            SqlConnection conn = new SqlConnection(connStr);
            SqlCommand cmd = new SqlCommand("select * from SPLASH", conn);

            conn.Open();
            SqlDataReader rdr = cmd.ExecuteReader();
            System.Data.DataTable dt = new System.Data.DataTable();
            dt.Load(rdr);
            GridViewAddSplash.DataSource = dt;
            GridViewAddSplash.DataBind();
            conn.Close();
            conn.Dispose();
            cmd.Dispose();
        }

        private void addMainCat()
        {
        }
         

        private void showMainCat()
        {
            
        }

        private void addSubCat()
        {
             
        }

        private void showSubCat()
        {
           
        }

        private void addBusinessContact()
        
        { 
                                 
        }

        private void showBusinessContact()
        {
           
        }

        private void addPersonContact()
        {
                     
        }

        private void showPersonContact()
        {
           
        }
        
    }
}