Error covert string to int

Question

I make one GUI form. i which i make 3 textboxes. i first textbox the no. is genrated automatically becasue i use identity in SQL. but how to display this identity no. in my first textboxe.

Satyapriya Nayak · Answer

Hi Arvind, Try this.. Create table employee (empid varchar(50),empname varchar(50),sal int) Untitled Page Text="Insert Data" /> using System; using System.Configuration; using System.Data; using System.Linq; using System.Web; using System.Web.Security; using System.Web.UI; using System.Web.UI.HtmlControls; using System.Web.UI.WebControls; using System.Web.UI.WebControls.WebParts; using System.Xml.Linq; using System.Data.SqlClient; public partial class _Default : System.Web.UI.Page { string strConnString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString; string str; SqlCommand com; int count; protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { autogenerated(); } } void autogenerated() { SqlConnection con = new SqlConnection(strConnString); str = "select count(*) from employee"; com = new SqlCommand(str, con); con.Open(); count = Convert.ToInt16(com.ExecuteScalar()) + 1; txt_empid.Text = count.ToString(); txt_empid.Enabled = false; con.Close(); } protected void btn_insert_Click(object sender, EventArgs e) { SqlConnection con = new SqlConnection(strConnString); con.Open(); str = "insert into employee values('" + txt_empid.Text.Trim() + "','" + txt_empname.Text.Trim() + "'," + txt_sal.Text.Trim() + ")"; com = new SqlCommand(str, con); com.ExecuteNonQuery(); con.Close(); Label4.Text = "Records successfully Inserted"; txt_empname.Text = ""; txt_sal.Text = ""; autogenerated(); } } Thanks If this post helps you mark it as answer

Aarti · Answer

Hi, Try beloow line of code Int32 a = Convert .ToInt32(textBox1.Text);

Pravin Ghadge · Answer

hi Arvind, ur question is not clear for me. u want to display identity value after saving the data in sql. am i correct? If yes then, use datareader or adapter to fetch the record.