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Sunday, August 7, 2011

Preventing Re-submission of data on Browser Refresh

Avoid Duplicate record insert on page refresh using ASP.NET


Dim IsPageRefresh As Boolean = False
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load

If Page.IsPostBack Then
            If ViewState("postid").ToString() = Session("postid").ToString() Then
                IsPageRefresh = True
 End If

Session("postid") = System.Guid.NewGuid().ToString()
        ViewState("postid") = Session("postid")

End Sub

Protected Sub btnSubmit_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles btnSubmit.Click

        If Page.IsValid And IsPageRefresh Then
' Write your Code here
End Sub


bool IsPageRefresh = false;

protected void Page_Load(object sender, System.EventArgs e)
 if (Page.IsPostBack) {
  if (ViewState("postid").ToString() == Session("postid").ToString()) {
   IsPageRefresh = true;
 Session("postid") = System.Guid.NewGuid().ToString();
 ViewState("postid") = Session("postid");


protected void btnSubmit_Click(object sender, System.EventArgs e)
 if (Page.IsValid & IsPageRefresh) {
  // Write your Code here

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