请教一段代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

using System.Data.SqlClient;
namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            try
            {
                string ConStr = "server=(local);user id=sa;pwd=;database=dada_2010";

                SqlConnection con = new SqlConnection(ConStr);
                StringBuilder sb = new StringBuilder();
                sb.Append(@"select * from ,mertrial");
                string SqlStr = sb.ToString() + "where Convert(datetime,Convert(varchar(10),DATE,120)) between'" + ((Form1)this.Owner).dateTimePicker1.Value.ToShortDateString() + "'and'" + ((Form1this.Owner).dateTimePicker2.Value.ToShortDateString() + "'";
                SqlDataAdapter ada = new SqlDataAdapter(SqlStr, con);
                DataSet ds = new DataSet();
                ada.Fill(ds);
                this.dataGridView1.DataSource = ds.Tables[0].DefaultView;
            }
            catch
            {
                return;
            }
        }
    }
}

请教下这段代码有没有问题为什么我获取不到数据。。 --------------------编程问答-------------------- 此处SqlDataAdapter ada = new SqlDataAdapter(SqlStr, con);
设置断点，单步调试一下
看SqlStr是什么东东，然后在数据库中执行一下，看是不是有数据。 --------------------编程问答-------------------- 恩，UP --------------------编程问答-------------------- 把sql语句放到数据库里执行…… --------------------编程问答-------------------- private void button1_Click(object sender, EventArgs e)
        {

            try
            {
                string ConStr = "server=(local);user id=sa;pwd=;database=dada_2010";

                SqlConnection con = new SqlConnection(ConStr);
                StringBuilder sb = new StringBuilder();
                sb.Append(@"select * from mertrial");
                string SqlStr = sb.ToString() + "where Convert(datetime,Convert(varchar(10),DATE,120)) between'" + ((Form1)this.Owner).dateTimePicker1.Value.ToShortDateString() + "'and'" + ((Form1this.Owner).dateTimePicker2.Value.ToShortDateString() + "'";
                SqlDataAdapter ada = new SqlDataAdapter(SqlStr, con);
                DataSet ds = new DataSet();
                ada.Fill(ds);
                this.dataGridView1.DataSource = ds.Tables[0].DefaultView;
            }
            catch
            {
                return;
            }
        }
--------------------编程问答--------------------   sb.Append(@"select * from ,mertrial");
这个，号起啥作用滴？？
--------------------编程问答-------------------- 你的就是button1_Click事件，从数据库里面取出数据填充在GridView里面



    public void Button1_Click(object sender, EventArgs e)

        {

            string str = @"server=.\SQLEXPRESS;database=db_CSManage;uid=sa;pwd=sa";

            SqlConnection Conn = new SqlConnection(str);

            string sql = "select * from mertrial";

            SqlDataAdapter sd = new SqlDataAdapter(sql, Conn);

            DataSet ds = new DataSet();

            sd.Fill(ds);



            this.dataGridView1.DataSource = ds.Tables[0].DefaultView;

        }

这样呢？ --------------------编程问答--------------------

引用 5 楼 wanghui0380 的回复:

sb.Append(@"select * from,mertrial");
这个，号起啥作用滴？？

嗯那个逗号代码里没有的，用6楼的那个是可以的
但我想根据这个DATE 字段来查询出相匹配的数据用我那个代码就查不出来任何数据请教下如何弄谢谢大家
--------------------编程问答-------------------- 继续顶一下~~~ --------------------编程问答-------------------- 还得继续顶顶

补充：.NET技术 ,  C#