How To Show Message Box?
To show JavaScript message box by using ASP.NET server side code you basically need to add client script and use alert JavaScript function. There are different implementations of this, but one of the best is to add ASP.NET folder App_Code and then add new MessageBox class in App_Code folder. The code for MessageBox class is:
[ C# ]
using
System.Web.UI;
///
<summary>
///
ASP.NET JavaScript message box class
///
</summary>
public
static class
MessageBox
{
public static
void ShowMessage(string
MessageText, Page MyPage)
{
MyPage.ClientScript.RegisterStartupScript(MyPage.GetType(),
"MessageBox",
"alert('" + MessageText.Replace("'",
"\'") + "');",
true);
}
}
[ VB.NET ]
Imports
System.Web.UI
'''
<summary>
'''
ASP.NET JavaScript message box class
'''
</summary>
Public
Static Class
MessageBox
Public Static
Sub ShowMessage(ByVal
MessageText As String,
ByVal MyPage As
page)
MyPage.ClientScript.RegisterStartupScript(MyPage.GetType(), _
"MessageBox",
"alert('" & MessageText.Replace("'",
"\'") & "');",
True)
End Sub
End
Class
After that, you can call this MessageBox class from any page with code like this:
[ C# ]
protected
void Page_Load(object
sender, EventArgs e)
{
MessageBox.ShowMessage("This
is a message!", this.Page);
}
[ VB.NET ]
Protected
Sub Page_Load(ByVal
sender As Object,
ByVal e As
System.EventArgs) Handles
Me.Load
MessageBox.ShowMessage("This is a message!",
Me.Page)
End
Sub
Note that if you use ASP.NET 1.1 with Visual Studio 2003 you don't have App_Code folder. In that case you can show message box with simple code like this:
[ C# ]
Response.Write("<SCRIPT>alert('This is a message')</SCRIPT>");
[ VB.NET ]
Response.Write("<SCRIPT>alert('This is a message')</SCRIPT>")
Related articles:
1. How To Get Web Site Thumbnail Image In ASP.NET
