In previous pose I have discussed how to catch error occurred by Store procedure. Now I am going to show you how to catch CHECK constraint error in ADO.NET code. And surprisingly there is nothing to change in your ADO.NET code. Smart try-catch mechanism of C# is enough to handle the situation.
Now I will create one table with one check constraint like,
create table TestTable(id int not null primary key identity(1,1),sal int not null CHECK(sal >0))
Here you can see my sal column will not take any negative value as I have set one check constraint in this column.
Now this is our ADO.NET code , When I will try to fire
insert into TestTable(sal) values(-100)
query to this table, It will throw error.
static void Main(string args)
SqlConnection con = new SqlConnection();
con.ConnectionString = "Data Source=SERVERNAME;Initial Catalog=test;Integrated Security=True";
SqlCommand cmd = new SqlCommand();
cmd.CommandText = "insert into TestTable(sal) values(-100)";
cmd.CommandType = CommandType.Text;
cmd.Connection = con;
int Value = (Int32)cmd.ExecuteNonQuery();
catch (SqlException ex)
Console.Write("Error Occur in Database" +"\n" +"Error Code"+ ex.Number +"\n" + "Error Message" + ex.Message);