DataGrid中checkbox用JS脚本如何控制是否被选中

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DataGrid中checkbox用JS脚本如何控制是否被选中？谢谢提供代码！

lisongfox

private void IsChecked()
{
string jsScript = "<script language=JavaScript> \n"
+ "<!-- \n"
+ "function IsChecked (frm) { \n"
+ " var chkNum=0;\n"
+ " // loop through all elements \n"
+ " for (i=0; i<frm.length; i++) {\n \n"
+ " // Look for our checkboxes only \n"
+ " if (frm.elements[i].name.indexOf ('chkChoose') !=-1) { \n"
+ " // 选中的记录 \n"
+ " if(frm.elements[i].checked) { \n"
+ " chkNum = chkNum +1;\n"
+ " } \n"
+ " } \n"
+ " } \n"
+ " if(chkNum == 0){ \n"
+ " alert('请选择资产扩展属性！');\n"
+ " return false;}\n"
+ "} \n \n \n"
+ "//--> \n"
+ "</script>";
if(!IsClientScriptBlockRegistered("clientScript"))
{
// 测试该ID的脚本是否已经被注册，若还没被注册则将之注册
Page.RegisterClientScriptBlock("clientScript",jsScript);
}
// ---------修改记录结束----------
}