AUTOGENARATE

ipsita pani

if the identity is set to true then it autogenarate the field value.

how to get that value in a dropdownlist in c#.net.

plz help me.

5 Replies

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Jignesh Trivedi13y ago
Accepted answer
hi,
try following code.
SqlConnection con = new SqlConnection("your connectionstring");
SqlCommand command = new SqlCommand();
command.CommandType = CommandType.Text;
// write your query instead of my department master query.
command.CommandText = "Insert into DepartmentMaster values('newName','new decription');select @id = SCOPE_IDENTITY()";
command.Connection = con;
con.Open();
command.Parameters.Add("@id", DbType.Int32).Direction = ParameterDirection.Output;
int res = command.ExecuteNonQuery();
var newValue = command.Parameters["@id"].Value;
con.Close();
hope this will help you.
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Jignesh Trivedi13y ago
hi,

yes,
to avoid SQL injection, use stored procedure or parameterized query.
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ipsita pani13y ago
well it works fine,but in the insert button we have tto pass the parameterized queries,bcz concatenation introduces sql injection. thanks.
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Sreejesh SP13y ago
Dear Pani,

try following code.
SqlConnection con = new SqlConnection("your connectionstring");
SqlCommand command = new SqlCommand();
command.CommandType = CommandType.Text;

command.CommandText = "Insert into DepartmentMaster values('newName','new decription');set @id = @@IDENTITY";
command.Connection = con;
con.Open();
command.Parameters.Add("@id", DbType.Int32).Direction = ParameterDirection.Output;
int res = command.ExecuteNonQuery();
var newValue = command.Parameters["@id"].Value;
con.Close();

thanks

Sreejesh

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Satyapriya Nayak13y ago
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.cs" Inherits="Dynamic_increment_using_Dropdown._Default" %>

    Untitled Page





                 Width="100px">











            Text="Insert Data" />








using System;
using System.Collections;
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;
namespace Dynamic_increment_using_Dropdown
{
    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)
            {
                DropDownList1.Items.Add("Select");
                SqlConnection con = new SqlConnection(strConnString);
                str = "select count(*) from employee";
                com = new SqlCommand(str, con);
                con.Open();
                count = Convert.ToInt16(com.ExecuteScalar()) + 1;
                DropDownList1.Items.Add(count);
                con.Close();
            }

        }

        protected void btn_insert_Click(object sender, EventArgs e)
        {
            SqlConnection con = new SqlConnection(strConnString);
            con.Open();
            str = "insert into employee values('" + DropDownList1.SelectedItem.Text.Trim() + "','" + txt_empname.Text.Trim() + "'," + txt_sal.Text.Trim() + ")";
            com = new SqlCommand(str, con);
            com.ExecuteNonQuery();
            con.Close();
            Label4.Text = "Records successfully Inserted";
        }
    }
}
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