Thread: c# & SQL newbie

  1. #1
    Registered User
    Join Date
    Jan 2005

    c# & SQL newbie

    Hi I am learning to code in C#. But I am stuck at one place. I am trying to connect to SQL server through C#

    I am using VS 2005 and below is the code.

    using System;
    using System.Collections.Generic;
    using System.ComponentModel;
    using System.Data;
    using System.Drawing;
    using System.Text;
    using System.Windows.Forms;
    namespace WindowsApplication2
        public partial class Form1 : Form
            public Form1()
            System.Data.SqlClient.SqlConnection con;
            DataSet ds1;
            System.Data.SqlClient.SqlDataAdapter da;
            DataRow dRow;
            private void Form1_Load(object sender, EventArgs e)
                con = new System.Data.SqlClient.SqlConnection();
                ds1 = new DataSet();
                con.ConnectionString = "Data Source=.\\SQLEXPRESS;AttachDbFilename=C:\\TransNo.mdf;Integrated Security=True;Connect Timeout=30;User Instance=True";
                string sql = "SELECT * From tblTransNo";
                da = new System.Data.SqlClient.SqlDataAdapter(sql, con);
                da.Fill(ds1, "TransNo");
            private void NavigateRecords()
                DataRow dRow = dsl.Tables["TransNo"].Rows[0];
                textBox1.Text = dRow.ItemArray.GetValue(2).ToString();

    Here are the errors I am getting

    Error	1	The name 'dsl' does not exist in the current context	C:\Documents and Settings\User\My Documents\Visual Studio 2005\Projects\WindowsApplication2\WindowsApplication2\Form1.cs	40	28	WindowsApplication2
    Any help is appreciated.

  2. #2
    Jack of many languages Dino's Avatar
    Join Date
    Nov 2007
    Katy, Texas
    Safari tells me there is one instance of "DSL" and 3 instances of "DS1". Looks like a typo.
    Mac and Windows cross platform programmer. Ruby lover.

    Quote of the Day
    12/20: Mario F.:I never was, am not, and never will be, one to shut up in the face of something I think is fundamentally wrong.

    Amen brother!

  3. #3
    Registered User
    Join Date
    Jan 2005
    Thanks Dino!!!...I guess I have to learn how to troubleshoot these errors. Spent 1 hours looking what's wrong with it

  4. #4
    Registered User
    Join Date
    Aug 2010
    The joys of programming.
    Never re-write code unless the user benefits

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