问题描述

大神，看看那出错了，说user有语法错误

private void button1_Click(object sender, EventArgs e)
{
SqlConnection con = null;
try
{
con = new SqlConnection(
"Data Source=llll-PC;Initial Catalog=yonghu;User ID=sa;Password=123");

            string sql = "select * from Table_1 where Table_1.user=@name and Table_1.pwd=@pwd";
            SqlCommand cmd = new SqlCommand(sql, con);
            cmd.Parameters.AddWithValue("@name", textBox1.Text);
            cmd.Parameters.AddWithValue("@pwd", textBox2.Text);

            con.Open();
            cmd.Connection = con;

            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataTable dt = new DataTable();
            da.Fill(dt);

            if (textBox1.Text=="llll"&&textBox2.Text=="123")
            {
                MessageBox.Show("成功！");
                Form3 f3 = new Form3();
                f3.Show();
            }
            else
            {
                MessageBox.Show("失败！");
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message);
        }
        finally
        {
            con.Close();
        }
    }

解决方案

放到你的数据库环境中执行可以吗？

解决方案二：

数据库里有这个字段吗，，