在c＃中删除创建表单中的记录

Question

我正在使用c＃，在此我想从表单中删除记录，因为我有以下代码..

     private void button3_Click(object sender, EventArgs e)
    {
        OleDbConnection con = new OleDbConnection();
        con.ConnectionString = "PROVIDER=Microsoft.Jet.OLEDB.4.0;Data  Source=C:\\Documents and Settings\\mayur patil\\My Documents\\Dairy_db\\tblCompany.mdb";
        con.Open();
        string sql = "DELETE FROM tblCompany WHERE (CoCode = 1)";

    }

但我没有得到答案......

Answer 1

您需要设置OleDbCommand

您案例的完整代码，

private void button3_Click(object sender, EventArgs e)
    {
        OleDbConnection con = new OleDbConnection();
        con.ConnectionString = "PROVIDER=Microsoft.Jet.OLEDB.4.0;Data  Source=C:\\Documents and Settings\\mayur patil\\My Documents\\Dairy_db\\tblCompany.mdb";
        string sql = "DELETE FROM tblCompany WHERE (CoCode = 1)";

        con.Open();
        OleDbCommand cmd = new OleDbCommand(sql, con);
        cmd.ExecuteNonQuery();
        con.Close();

    }

有关整个实施的更多信息，请阅读此处 http://www.java2s.com/Code/CSharp/Database-ADO.net/DeletedatabaserecordsthroughOleDbCommandandverifytheresults.htm

Answer 2

您需要使用SQL和连接执行OleCommand。