删除查询在c＃.net中不起作用

Question

        private void btnDelete_Click(object sender, EventArgs e)
    {

      //dataGridView1.Rows.RemoveAt(dataGridView1.CurrentRow.Index);

        OleDbConnection con = new OleDbConnection(constr);
        con.Open();

        OleDbCommand cmd = new OleDbCommand("DELETE FROM tb1 WHERE name='@Name'", con);
        cmd.Parameters.AddWithValue("@Name", txtproject_name.Text);


        cmd.ExecuteNonQuery();

        Bind();

        MessageBox.Show("deleted......");
        con.Close();
        }

This is my code for deleting the data from a database on a button click...but it is not deleting anything..can anyone help me with the code

Answer 1

删除参数周围的引号：

"DELETE FROM tb1 WHERE name=@Name"

Answer 2

Try this

   private void btnDelete_Click(object sender, EventArgs e)
    {

      //dataGridView1.Rows.RemoveAt(dataGridView1.CurrentRow.Index);

        OleDbConnection con = new OleDbConnection(constr);
        con.Open();

        OleDbCommand cmd = new OleDbCommand("DELETE FROM tb1 WHERE name=@Name", con);
        cmd.Parameters.AddWithValue("@Name", txtproject_name.Text);


        cmd.ExecuteNonQuery();

        Bind();

        MessageBox.Show("deleted......");
        con.Close();
        }

Answer 3

尝试不使用@Name周围的2 [']