又有问题了....我
public   void   bind(object   sender,EventArgs   E)
{
string   strConnection= "Provider=Microsoft.Jet.OleDb.4.0;Data   Source= ";
strConnection+=Server.MapPath( "1.mdb ");
OleDbConnection   objConnection=new   OleDbConnection   (strConnection);
String   se= "select   shuliang   from   jinhuo   where   bianhao=@bh   and   shuliang> =0 ";
OleDbCommand   objCommand1   =   new   OleDbCommand(se,objConnection);
objCommand1.Parameters.Add(new   OleDbParameter( "@bh ",OleDbType.Char,40));
objCommand1.Parameters[ "@bh "].Value=bianhao.Text;
OleDbDataAdapter   obj   =   new   OleDbDataAdapter(se,objConnection);
DataSet   myds=new   DataSet();
obj.Fill(myds, "jinhuo ");
dgrdMain.DataSource=myds.Tables[ "jinhuo "].DefaultView;
dgrdMain.DataBind();
}
报错.
至少一个参数没有被指定值.
将String   se= "select   shuliang   from   jinhuo   where   bianhao> =0   and   shuliang> =0
正常.
也就是说在读取文本框值的时候有问题.
或者是这里的变量读取值与表格显示一起运行出了问题.

希望哪位高手帮忙解决下.


------解决方案--------------------
string bh = TextBox.Text;
string se= "select shuliang from jinhuo where bianhao= " + bh + " and shuliang> =0 ";