How to prevent duplicate record instertion on Page referesh,considering i dont have any primary key.

Hello Everyone,

Suppose I had Inserted one record, Now, when I refresh Page same record is inserted again though I had cleared all the textboxes after insertion. How can i avoid this???


For This you to put the following code

protected void Page_Load(object sender, EventArgs e)
{

if (!Page.IsPostBack)
{
Session["update"] = Server.UrlEncode(System.DateTime.Now.ToString());
}
}

protected void btnSubmit_PreRender(object sender, EventArgs e)
{
ViewState["update"] = Session["update"];
}

protected void btnSubmit_Click(object sender, ImageClickEventArgs e)
{

if (Session["update"].ToString() == ViewState["update"].ToString())
{
Session["update"] = Server.UrlEncode(System.DateTime.Now.ToString());

//Write your Insert Code.

}

}

Thank you.
Sanjeev Kumar