Una cosa di questo tipo?
Pagina aspx:
Pagina .cs:
using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void Button1_Click(object sender, EventArgs e)
{if (String.Equals(TextBox1.Text,""))
{
string Script = "window.alert('Inserire un dato');";
string MyKey = "KeyScript_1";
ScriptManager.RegisterClientScriptBlock(this.Page, this.GetType(), MyKey, Script, true);
}
}
}
Spero fosse così che volevi fare, sennò chiedi..
Ciao!