Question

I made a stored procedure called “usp_insertempdata” that inserts data into the database table called “Employee”, so i executed it and when i save data i brings an exception:
“The ConnectionString property has not been initialized.
Any help please!
here is my code

    SqlConnection _SqlConnection = new SqlConnection ( );
string strConnectionString = "";
SqlCommand cmd = new SqlCommand ( );

strConnectionString = @"Server='bisweb\bisweb';Database=x_kgabo;Trusted_Connection=true;";

Int32 rowsAffected;

List<object> lstParams = new List<object> ( );

cmd.Parameters.Add ( new SqlParameter ( "@vchEmployeeNo", SqlDbType.VarChar ) );
cmd.Parameters [ "@vchEmployeeNo" ].Value = txtEmployeeNumber.Text;
cmd.Parameters.Add ( new SqlParameter ( "@vchSurname", SqlDbType.VarChar ) );
cmd.Parameters [ "@vchSurname" ].Value = txtSurname.Text;
cmd.Parameters.Add ( new SqlParameter ( "@vchFirstName", SqlDbType.VarChar ) );
cmd.Parameters [ "@vchFirstName" ].Value = txtFirstName.Text;
cmd.Parameters.Add ( new SqlParameter ( "@vchPosition", SqlDbType.VarChar ) );
cmd.Parameters [ "@vchPosition" ].Value = txtPosition.Text;
cmd.Parameters.Add ( new SqlParameter ( "@vchIdNumber", SqlDbType.VarChar ) );
cmd.Parameters [ "@vchIdNumber" ].Value = txtIdNumber.Text;
cmd.Parameters.Add ( new SqlParameter ( "@vchGender", SqlDbType.VarChar ) );
cmd.Parameters [ "@vchGender" ].Value = drpdwnGender.SelectedItem.Value;
cmd.Parameters.Add ( new SqlParameter ( "@vchRace", SqlDbType.VarChar ) );
cmd.Parameters [ "@vchRace" ].Value = drpdwnRace.Text;
cmd.Parameters.Add ( new SqlParameter ( "@vchEmail", SqlDbType.VarChar ) );
cmd.Parameters [ "@vchEmail" ].Value = txtEmail.Text;
cmd.Parameters.Add ( new SqlParameter ( "@iBranchNo", SqlDbType.VarChar ) );
cmd.Parameters [ "@iBranchNo" ].Value = txtBranchNo.Text;
cmd.Parameters.Add ( new SqlParameter ( "@bHasMentor", SqlDbType.VarChar ) );
cmd.Parameters [ "@bHasMentor" ].Value = drpdwnMentor.Text;
cmd.Parameters.Add ( new SqlParameter ( "@vchMentorName", SqlDbType.VarChar ) );
cmd.Parameters [ "@vchMentorName" ].Value = txtMentorName.Text;
cmd.Parameters.Add ( new SqlParameter ( "@vchMentorStaffNo", SqlDbType.VarChar ) );
cmd.Parameters [ "@vchMentorStaffNo" ].Value = txtMentorStaffNo.Text;
cmd.Parameters.Add ( new SqlParameter ( "@dtMentorDate", SqlDbType.VarChar ) );
cmd.Parameters [ "@dtMentorDate" ].Value = calMentorDate.SelectedDate;

cmd.CommandText = "usp_insertempdata";
cmd.CommandType = CommandType.StoredProcedure;
cmd.Connection = _SqlConnection;

_SqlConnection.Open ( );

rowsAffected = cmd.ExecuteNonQuery ( );

_SqlConnection.Close ( );

try
{
    _SqlConnection.ConnectionString = strConnectionString;
    _SqlConnection.Open ( );

}
catch ( Exception ex )
{
    //throw  ex;
    messagefunctions ( );
    lblError.Text = "There was a problem inserting a record into the database, please consult with systems administrators " + ex.Message.ToString ( );
}
finally
{
    if ( _SqlConnection != null )
        _SqlConnection.Close ( );
}

Answer 1

The problems seems to be that you are assigning the connection string after you called ExecuteNonQuery and after your first call to Open. The second call is nonsense.
The correct sequence would be:

cmd.CommandType = CommandType.StoredProcedure;
_SqlConnection.ConnectionString = strConnectionString;
cmd.Connection = _SqlConnection;

try
{
    _SqlConnection.Open ( );

    rowsAffected = cmd.ExecuteNonQuery ( );

    _SqlConnection.Close ( );
}