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其实就一句话的事 ScriptManager.RegisterStartupScript(this.UpdatePanel1,this.GetType(), "HelloWorld", "alert('The page has loaded!')",true); ... 阅读全文
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try head 1head 2head 3 123 123 123 123 123 123 阅读全文
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document.getElementById('Select1').options[document.getElementById('Select1').selectedIndex].value;//value值 document.getElementById('Select1').options[document.getElementById('Select1').selectedIndex]... 阅读全文
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答1: c# 的代码看不太懂,不过最简单的做法是 手动在 第一项添加 select 行 ______________________________________________________________________________________________ 答2: DropDownList1.Items[index].Selected = true; 就可以了 _____... 阅读全文