how display data from sql table in c#

ALTER PROCEDURE [dbo].[Transaction]  
( 
           
            @Patient nvarchar(50),
            @E_TO nvarchar(50),
            @R_type int,
            @User_name nvarchar(50),
            @ReportType nvarchar(50),
            @Patient_no  int,
            @Patient_ID_NO numeric(18,0),
            @idcount numeric(18,0) output
   
) 
AS  
BEGIN  
           
         declare @tempid numeric(18,0)
         set @tempid = 0;  
         declare @idcnt numeric(18,0)
         select @idcnt =isnull( max(idcount),0) from Transactions where year(R_date)=year(getdate())  
         if (@idcnt =0)  
         set @tempid=1  
         else  
         set @tempid = @idcnt +1  
        
          
          INSERT INTO dbo.Transactions (Patient,E_TO,R_date,R_from,User_name,report_type,Patient_no,Patient_ID_NO,idcount)values (@Patient,@E_TO,getdate(),@R_type,@User_name,@ReportType,@Patient_no,@Patient_ID_NO,@tempid)
return @idcount
 END 

try
            {
                if (NameTxtBx.Text == "" || ToTxtBx0.Text == "" || DropDownList1.SelectedIndex == 0 || RadioButtonList2.SelectedIndex == -1 || ( PatID_NO.Text == "")|| (Convert.ToUInt64(PatNo.Text) <= 0) || (Convert.ToUInt64(PatNo.Text) > 200000000))
                {
                    Message("Please check the field u entered", this);
                    return;
                   
                }
                else
                {
                    try
                    {
                        
                    
                        string Patient_name = NameTxtBx.Text, Export_TO = ToTxtBx0.Text, repType = RadioButtonList2.SelectedValue  ;
                        int PatNoVal;
                        PatNoVal = Convert.ToInt32(PatNo.Text);
                        PatNoVal = int.Parse(PatNo.Text);
                        decimal PatID = decimal.Parse(PatID_NO.Text);
                        int? replay_To_type = Int16.Parse(DropDownList1.SelectedValue);
                        string idcount;
 
                        try
                        {
 
                            SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["con"].ConnectionString);
                            con.Open();
                            SqlCommand cmd = new SqlCommand();
                            cmd.CommandType = CommandType.StoredProcedure;
                            cmd.CommandText = "Transaction";
                            cmd.Parameters.AddWithValue("@Patient", Patient_name);
                            cmd.Parameters.AddWithValue("@E_TO", Export_TO);
                            cmd.Parameters.AddWithValue("@R_type", repType);
                            cmd.Parameters.AddWithValue("@ReportType", replay_To_type);
                            cmd.Parameters.AddWithValue("@Patient_no", PatNoVal);
                            cmd.Parameters.AddWithValue("@Patient_ID_NO", PatID);
                            cmd.Parameters.AddWithValue("@User_name", Label1.Text = Session["name"].ToString ());
                            cmd.Parameters.Add("@idcount", SqlDbType.Decimal);
                            cmd.Parameters["@idcount"].Direction = ParameterDirection.Output;
                            cmd.Connection = con;
                            cmd.ExecuteNonQuery();
                            con.Close();
                            TextBox1.Text = cmd.Parameters["@RETURNOUT"].Value.ToString();
                            ClientScriptManager cs = Page.ClientScript;
                            cs.RegisterStartupScript(this.GetType(), "IDCount", "alert('" + cmd.Parameters["@RETURNOUT"].Value.ToString() + "');", true);
 
                        }
 
                        catch (Exception ex)
                        {
                            Message("Block 3: Error\nThe Reported fault is:\n" + ex.Message, this);
                        }
 
                        PatNo.Text = "";