show alert message from server side

show alert message from server side:
If you want to show msg if you are posting the page to server through update panal (asynchronous postback) then you have to use this function.

//During Asynchronous Post Back in Update Panal Use ScriptManager (Inside Update Panal)

public void alertBox(string Message)

{

ScriptManager.RegisterStartupScript(Page, this.GetType(), "Key", string.Format("alert('{0}');", Message), true);

}

 

If you want to show message in browser and want to show it through javascript (alert function)

then use this function.

 

// During synchronous normal Post Back Use ClientScript

public static void ShowMessage(string MessageText, Page MyPage)

{

MyPage.ClientScript.RegisterStartupScript(MyPage.GetType(), 
"MessageBox", "alert('" + MessageText.Replace("'", "\'") + "');", true);

}