Auto Increment ID

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Sir i want to know that -how to make autoincrement id  in asp.net/C# with out using store-procedure in sql..
can it make by a Method or Function in .net ?.
  1. Re: Auto Increment ID

    Hello pawan, i hope this code will help you

    {
        public void Autogenrate()
        {
            int r;
            try
            {
              con = new SqlConnection("data source=XYZ; user id=ABC; password=***; initial catalog=Detail");
           con.Open();
                SqlCommand cmd = new SqlCommand("Select max(id) from empp1", con);
                SqlDataReader dr = cmd.ExecuteReader();
                if (dr.Read())
                {
                    string d = dr[0].ToString();
                    if (d == "")
                    {
                        id.Text = "1001";//set the value in textbox which name is id
                    }
                    else
                    {
                        r = Convert.ToInt32(dr[0].ToString());
                        r = r + 1;
                        id.Text = r.ToString();
                    }
                }
                con.Close();
                con.Open();
              cmd.CommandText = "insert empp1 values('" + id.Text + "','" +   txtName.Text + "','" + txtCity.Text + "')";
                cmd.ExecuteNonQuery();
            }
            catch (Exception ex)
            {
                Response.Write("<script>alert("+ex.Message+")</script>");
            }
            finally
            {
                con.Close();
            }

      Modified On Apr-03-2018 06:06:39 AM
  1. Re: Auto Increment ID

    Pawan are you talking about Auto Increment ID in SQLServer? If yes then follow these steps without creating any method..

    1.Open SQl Server Management Studio Express.
    2.Go to your Database.
    3.Rigth click on your Database Table Name.
    4.Then Click on Modify.
    5.In modify window click on your " ID" column Name.
    6.Change its Data Type to int.
    7.Then go to Column Prorerties below.
    8.Under the "Indentity Specifications" nodes you will see (Is Indentity).
    8.Set this property "Yes".




      Modified On Feb-22-2011 09:35:44 AM
  1. Re: Auto Increment ID

    Hi Mr. Singh,

    I followed your snippet however I am getting an error "Input string was not in a correct format." Highlighted in red.
    Here's the snippet

    if (dr.Read())
                            {
                                string d = dr[0].ToString();
                                if (d == "")
                                {
                                    txtstudid.Text = strTesda;
                                }
                                else
                                {
                                    r = Convert.ToInt32(dr[0].ToString());
                                    r = r + 1;
                                    txtstudid.Text = r.ToString();
                                }

    Any idea why it causes this error? Thanks.


      Modified On Apr-03-2018 06:07:00 AM
  1. Re: Auto Increment ID

    Hi Sheen Buhay,

    Debug your code and check what value you have in dr[0].ToString(). I thing you might be getting Alphabets or symbols.

    Suggestion: Don't just copy and paste the code snippet provided in the forum as those are not generalize, those are specific set of code used to accomplish a specific task. Please do modify the code according to your requirement.

    Thanks

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