怎样弹出一个对话框!
string script;
if(decscr!=100)
{ script = "<script language=JavaScript> ";
script += "window.alert('该训练已过了报名时间!')";
script += "</script>";
if (!this.IsClientScriptBlockRegistered("clientScript"))
this.RegisterClientScriptBlock("clientScript", script);}
在一个if语句后弹出一个对话框,这样怎么不行