Ivan Kahl
2020-01-31 18:55
您将使用此处String.IsNullOrEmpty记录的方法。
您的代码如下所示：
<script runat="server" language="C#">
protected void Page_Load(object sender, EventArgs e)
{
lblMessage.Text = Request.QueryString["message"];
if (String.IsNullOrEmpty(lblMessage.Text) {
lblcard.Text = "Transaction made successfully!";
}
}
</script>
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