Must declare the scalar variable "@ACK".

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SqlConnection con1 = new SqlConnection("server=DIPESH-PC\\SQLEXPRESS;uid=sa;pwd=rerf;database=E-REGISTRATION");

C#

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
   {

       SqlCommand cmd1 = new SqlCommand("UPDATE feedback SET ACK=@ACK WHERE EMAIL_ID=@EMAIL_ID", con1);
       if (!string.IsNullOrEmpty(TextBox6.Text))
       {
       cmd1.Parameters.AddWithValue("@ACK",TextBox6.Text);
       }
       con1.Open();
       cmd1.ExecuteNonQuery();
       con1.Close();
       Label1.Text = "  Data Updates Succesfully on  " + System.DateTime.Now.ToShortDateString();
   }

Can somone please tell me why I get the error 'Must declare the scalar variable "@ACK"'.

Posted 2-May-14 11:59am

dipesh_karmakar

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Comments

Maciej Los 2-May-14 18:02pm

Are you shure? What about @EMAIL_ID? You did not specify it.

dipesh_karmakar 2-May-14 18:33pm

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data.SqlClient;

public partial class AboutUs_Objective_AboutUs : System.Web.UI.Page
{
SqlConnection con = new SqlConnection("server=DIPESH-PC\\SQLEXPRESS;uid=sa;pwd=rerf;database=E-REGISTRATION");
SqlConnection con1 = new SqlConnection("server=DIPESH-PC\\SQLEXPRESS;uid=sa;pwd=rerf;database=E-REGISTRATION");

protected void Page_Load(object sender, EventArgs e)
{
SqlCommand cmd = new SqlCommand("select * from feedback", con);
SqlDataReader reader;
con.Open();
reader = cmd.ExecuteReader();
reader.Read();
TextBox1.Text = reader["EMAIL_ID"].ToString();
TextBox2.Text = reader["FIRST_NAME"].ToString();
TextBox3.Text = reader["MOBILE_NO"].ToString();
TextBox4.Text = reader["SUBJECH"].ToString();
TextBox5.Text = reader["MESSAGE"].ToString();
TextBox6.Text = reader["ACK"].ToString();

reader.Close();

}

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{

SqlCommand cmd1 = new SqlCommand("UPDATE feedback SET ACK=@ACK WHERE EMAIL_ID=@EMAIL_ID", con1);
cmd1.Parameters.AddWithValue("@EMAIL_ID",TextBox1.Text);
cmd1.Parameters.AddWithValue("@ACK",TextBox6.Text);
con1.Open();
cmd1.ExecuteNonQuery();
con1.Close();
Label1.Text = " Data Updates Succesfully on " + System.DateTime.Now.ToShortDateString();
}

}

dipesh_karmakar 2-May-14 18:39pm

'Data Updates Succesfully on.........' MESSAGE DISPLAYED SUCCESSFULLY BUT DATABASE DATA FIELD CAN'OT UPDATE.....PLZ HELP ME

Maciej Los 3-May-14 4:10am

Debug the programm and check what is passed as @ACK and @EMAIL_ID parameter.

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PIEBALDconsult · Answer 1 · 2014-05-02T14:41:00

Solution 1

Get rid of the

VB

if (!string.IsNullOrEmpty(TextBox6.Text))

-- you must have the parameter, if it's NULL you must set it to DBNull.Value

Posted 2-May-14 14:41pm

PIEBALDconsult