判断asp:GridView控件是否有数据
function UploadInfo() {
var tr; var table = document.getElementById("MaterialListByADD"); //MaterialListByADD为ASP.NET控件asp:GridView
if (table) tr = table.getElementsByTagName("tr");
if (tr != null && tr.length > 1) {
if (confirm("表格上传后,将覆盖原有数据!")) {
invokeMasterPost('upFile');
} else {
return false;
}
} else { invokeMasterPost('upFile'); }
}