刚刚学习.NET,请帮忙!

[wangshuying]

我运行下面的程序，想实现DataSet中的查询，返回查询结果，但下面的程序出错，请高手们帮忙指导！
[WebMethod (Description="查询记录测试2--使用DataSet!")]
public DataTable datatest5(string strserch)
{
string strConnection="Server=localhost;User ID=sa;Password=cad;
Database=Northwind";
SqlConnection conn=new SqlConnection(strConnection);
string strCMD="Select employeeID,FirstName FROM Employees";
DataSet objDataSet=new DataSet();
SqlDataAdapter Adaptor1=new SqlDataAdapter(strCMD,conn);
Adaptor1.Fill(objDataSet,"Employees");
DataTable table1=objDataSet.Tables["Employees"];
DataRow[] objRows=table1.Select("FirstName='"+strserch+"'");
objRows[0]["FirstName"]="wangshuying";
return table1;
}

[acewang]

报什么错

[mynewpc]

DataRow[] objRows=table1.Select("FirstName='"+strserch+"'");
objRows[0]["FirstName"]="wangshuying";

中间要加判断DataRow.count>0

[mynewpc]

DataRow[] objRows=table1.Select("FirstName='"+strserch+"'");
objRows[0]["FirstName"]="wangshuying";

中间要加判断objRows.count>0

[l_clove]

WebMethon不能返回DataTable，请看：
Problems using an XML Web Service that returns a datatable
http://support.microsoft.com/default.aspx?scid=kb%3Ben-us%3B306134

[wyfwyf2000]

祝您进步