inserting values in table from a web form

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i have created a table Employeetable that have 4 fields. I want to insert the value in table .
my code is as follows:

C#

SqlConnection connection1 = new SqlConnection();
          SqlCommand Insert = new SqlCommand();
          connection1.ConnectionString = (@"Data Source=.\SQLEXPRESS;AttachDbFilename=C:\Users\Acer\Documents\employeeDB.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True");
          int a = Convert.ToInt32(txtEmpId.Text);
          string b = txtEmpName.Text;
          int c = Convert.ToInt32(txtSalary.Text);
          string d = txtCity.Text;
          Insert.CommandText = "INSERT INTO Employeetable(EmpId,EmpName,Salary,City) Values (@a,@b,@c,@d)";
          Insert.Parameters.AddWithValue("@a", a);
          Insert.Parameters.AddWithValue("@b", b);
          Insert.Parameters.AddWithValue("@c", c);
         Insert.Parameters.AddWithValue("@d", d);
          Insert.Connection.Open();
          Insert.ExecuteNonQuery();
         Insert.Connection.Close();
          Response.Write("you have succesfully inserted data");

also when i debug it on insert.connection.open() debugger points object refrence not set to instance of object. where i am wrong? please help me. Thanks.

Posted 31-May-13 1:57am

Rambo_Raja

Updated 31-May-13 1:59am

ZurdoDev

v3

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ZurdoDev 31-May-13 7:59am

You have not set the connection property on your sqlcommand

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ZurdoDev · Answer 1 · 2013-05-31T02:01:00

Solution 1

You need to set the Connection property on your SqlCommand. http://msdn.microsoft.com/en-us/library/system.data.sqlclient.sqlcommand.aspx[^]

For example,

C#

Insert.Connection = connection1;

Posted 31-May-13 2:01am

ZurdoDev

Swayam231 · Answer 2 · 2013-05-31T02:20:00

here add this code to your project

 Insert.CommandText = "INSERT INTO Employeetable(EmpId,EmpName,Salary,City) Values (@a,@b,@c,@d)";
Insert.connection= connection1; //name instance of your sql connection;

Why write two lines?? here the easy way:

string st="INSERT INTO Employeetable(EmpId,EmpName,Salary,City) Values (@a,@b,@c,@d";
//now declare your sql command
sql command insert= new sql command(st,connection1);

//or

sql command insert = new sql command("INSERT INTO Employeetable(EmpId,EmpName,Salary,City) Values (@a,@b,@c,@d", connection1)

You must associate your command to the connection one way or other!!!

:)

for assistance on retrieving visit
sql express