public void pagerbuttonclick(object sender,System.EventArgs e)
{
string arg;
arg=sender.CommandArgument;
switch(arg)
{
case "next":
if(dghistoryorder.currentpageindex<(dghistoryorder.pagecount-1)) 
dghistoryorder.currentpageindex+=1;
break;
case "prev":
if(dghistoryorder.currentpageindex>0) 
dghistoryorder.currentpageindex-=1;
break;
case "last":
dghistoryorder.currentpageindex=(dghistoryorder.pagecount-1);
break;
case "first":
dghistoryorder.currentpageindex=0;
break;
}
bindgrid();
}
错误:“object”并不包含对“CommandArgument”的定义
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