我想通过Empid在员工数据库上搜索，所以我在表单上创建了这段代码 [英] I Want To Search On The Database For Employee By Empid, So I Made This code On The Form

问题描述

private void btnSearch_Click(object sender, EventArgs e)
       {


           if (searchtext.Text == "")
           {
               MessageBox.Show("Plese Inter Employee's ID you are searching for");
               searchtext.Focus();
           }
           else
           {
               OleDbConnection con = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=D:\\Employees.mdb");
               OleDbDataAdapter ad = new OleDbDataAdapter("select * from Employee where EmpID=@EmpID", con);
               ad.SelectCommand.Parameters.Add("@EmpID", OleDbType.Integer);
               ad.SelectCommand.Parameters["@EmpID"].Value = int.Parse(searchtext.Text);


               DataSet ds = new DataSet();
               ad.Fill(ds, "Emp");
               DGV1.DataSource = ds.Tables["Emp"];


               if (ds == null)
               {

                   MessageBox.Show("not found!!");

               }
               else
               {
                  MessageBox.Show("The Employee you are searching for is listed down, if you want to update the data click the arrow sign on the lift side of the record");
               }
           }
       }


}

推荐答案

嗯。

Um.

OleDbDataAdapter ad = new OleDbDataAdapter("select * from Employee where EmpID=@AutherID", con);
ad.SelectCommand.Parameters.Add("@EmpID", OleDbType.Integer);
ad.SelectCommand.Parameters["@EmpID"].Value = int.Parse(searchtext.Text);

@AutherId 并且仅提供 @EmpID ？



也许你的意思是：

Checking against @AutherId and only providing @EmpID?

Perhaps you meant:

OleDbDataAdapter ad = new OleDbDataAdapter("select * from Employee where EmpID=@EmpID", con);
ad.SelectCommand.Parameters.Add("@EmpID", OleDbType.Integer);
ad.SelectCommand.Parameters["@EmpID"].Value = int.Parse(searchtext.Text);

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