How to show message box or alert message in asp.net form server side ?

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Hi I am create website ,in button click event form server side i need to show message/alert msg,but that button control inside of updatepanel.

This is code in source code

ASP.NET

<asp:UpdatePanel ID="UpdatePanel6" runat="server">
<ContentTemplate>
<asp:Button ID="btnChgPass" CssClass="font12" runat="server" Text="Apply Changes" />
</ContentTemplate>
</asp:UpdatePanel>

This is in server side,in this button click event i try to show "HAI" message using window.alert.but it never show message.

VB

 Protected Sub btnChgPass_Click(sender As Object, e As System.EventArgs) Handles btnChgPass.Click

 ClientScript.RegisterStartupScript(Me.GetType(), "ClientScript", "<script language='JavaScript'>  window.alert('HAI');</script>")

End Sub

Pls reply me how to show message form server side button click event ,when that button inside updatepanel control.

Note:When i add below lines in form load event,i.e register post back control for button control,then it show message,but page get refresh,i don't want get refresh or reload page,so only i use updatepanel.

VB

Dim script As ScriptManager = ScriptManager.GetCurrent(Page)
script.RegisterPostBackControl(btnChgPass)

Regards

Aravind

Posted 7-Apr-15 17:07pm

Aravindba

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3 solutions

Solution 1

you can write below code on page load.

XML

protected void Page_Load(object sender, EventArgs e)
{
  string message = "Hello! Mudassar.";
  System.Text.StringBuilder sb = new System.Text.StringBuilder();
  sb.Append("<script type = 'text/javascript'>");
  sb.Append("window.onload=function(){");
  sb.Append("alert('");
  sb.Append(message);
  sb.Append("')};");
  sb.Append("</script>");
  ClientScript.RegisterClientScriptBlock(this.GetType(), "alert", sb.ToString());
}

Posted 7-Apr-15 17:21pm

Member 10572607

Comments

Aravindba 7-Apr-15 23:31pm

Hi This is message show when page is open,i dont want in page load event,i need in button click event and that button reside in updatepanel control,pls read and reply.

Thanx

Solution 3

try below

VB

Protected Sub btnChgPass_Click(sender As Object, e As System.EventArgs) Handles btnChgPass.Click

  Dim javaScript As String = "<script language='JavaScript'> alert('Button Click client-side'); </script>"

  ScriptManager.RegisterStartupScript(UpdatePanel6, UpdatePanel6.[GetType](), "alert", javaScript, True)
End Sub

Posted 7-Apr-15 17:57pm

DamithSL

Updated 7-Apr-15 17:58pm

v2

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Aravindba · Accepted Answer · 2015-04-07T17:46:00

Solution 2

Hi I am use following code in button click event for show message box,it works fine

VB

Dim message As String = "alert('Please enter all values!')"
ScriptManager.RegisterClientScriptBlock(TryCast(sender, Control), Me.GetType(), "alert", message, True)

Regards
Aravind

Posted 7-Apr-15 17:46pm

Aravindba

Updated 8-Apr-15 14:37pm

v2