关于调用

public void LinkData(DataSet sd)
        {
            OleDbConnection thisOleDb = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=G:\C#练习\宽带安装登记表\工作人员登记表.mdb");
            thisOleDb.Open();
            OleDbDataAdapter thisOleDat = new OleDbDataAdapter("SELECT * FROM 工作人员登陆库", thisOleDb);
            OleDbCommandBuilder thisOleDbBer = new OleDbCommandBuilder(thisOleDat);
            DataSet1 thisDset = new DataSet1();
            thisOleDat.Fill(thisDset, "工作人员登陆库");
            DataColumn[] keys = new DataColumn[1];
            keys[0] = thisDset.Tables["工作人员登陆库"].Columns["用户名"];
            thisDset.Tables["工作人员登陆库"].PrimaryKey = keys;
            sd = thisDset;
            return ;
        } 
超越自我(331361969) 19:27:08
然后调用是． 
超越自我(331361969) 19:27:29
               DataSet1 sd = new DataSet1 (); 
                this.LinkData(sd);                           DataRow findrow = sd.Tables["工作人员登陆库"].Rows.Find(textBox1.Text);                if (findrow == null)
                {
                    if (MessageBox.Show(textBox1.Text + "用户名不存在", "错误信息！", MessageBoxButtons.OKCancel, MessageBoxIcon.Error)
                          == DialogResult.OK)
                    {
                        textBox1.Text = "";
                        textBox2.Text = "";
                        textBox1.Focus();
                    }
                    else
                    {
                        textBox2.Text = "";
                    } 
这样调用行吗?高手帮我看看。不对请指正.