GridView_RowCommand event fired again on page refresh

I have implement GridView Row Editing feature in my .net application using <asp:CommandField. I clicked on Update button to save the record after editing the row.Now if i refresh the page or press F5 GridView_RowCommand fired again.

How can we avoid this.Is th开发者_如何学JAVAere any mechanism to identify when user press F5 OR refresh the page.Is there any method in client side or in server side.

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Not exactly the best "technical" solution to your problem but you could always just do a Response.Redirect(Request.RawUrl) once you have finished doing anything you need to do in your RowCommand

Like I said, it's not the best "technical" solution but it is a solution

Dave

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One method of capturing this is to maintain a session variable that is related to the page in question. In the session variable you would keep some kind of state enumeration, key or string that would determine the last action taken. You could even use a simple incremented counter, and if you ever received a postedback counter that was equal to the session variable it would indicate a page refresh rather than a new action.

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Session["LastInsertedItem"] = null;
MyCustomObjType myCustomObject;
protected void Page_Load(object sender, EventArgs e)
{
    myCustomObject = Session["LastInsertedItem"] as MyCustomObjType;
}
void GridView_RowCommand(Object sender, GridViewCommandEventArgs e)
{
    If(myCustomObject == null || //!(compare your value with myCustomObject.field) )
    {
         // do your operations and save the values to myCustomObject and save that object back to Session.
    }
    else
    {
        // It is refreshed or same data is being insterted - don't know if second         option is possible in your case.
    }
}