c#连接access数据库出错

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

namespace test
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            string ID = this.mane.Text;
            string k1 = this.ke.Text;
            string k2 = this.key2.Text;
            string conStr = @"Provider=Microsoft.Jet.OLEDB.4.0;C:\Documents and Settings\admin\My Documents\Visual Studio 2008\Projects\test\CMS_DataManager.mdb";
            if (k1 != k2)
            {
                MessageBox.Show("两次输入的密码不一致 \n   请重新输入！");
                return;
            }

            string m = "select strUserName from SysBldUserDefine where strUserName=this.mane.Text";
            string i = "insert into SysBldUserDefine (strUserName,strUserPassword) values ('this.mane.Text','this.ke.Text')";
            OleDbConnection conn = new OleDbConnection(conStr);
            OleDbCommand cmd = new OleDbCommand(m, conn);
            try
            {
                conn.Open();
                cmd.Parameters.Add(new OleDbParameter("mane", m));
                int cnt = (int)cmd.ExecuteScalar();
                if (cnt == 0)
                {
                    cmd = new OleDbCommand(i, conn);
                    cmd.Parameters.Add(new OleDbParameter("strUserName", ID));
                    cmd.Parameters.Add(new OleDbParameter("strUserPassword", k1));
                    cmd.ExecuteNonQuery();
                    MessageBox.Show("注册成功！");
                }
                else
                {
                    MessageBox.Show("该用户已存在 \n 请重新注册！");
                }

            }
            catch(Exception ex)
            {
                MessageBox.Show("出现错误！");
            }

            finally
            {
                if (conn != null) conn.Close();
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            Form2 f2 = new Form2();
            this.Hide();
            f2.ShowDialog();
        }
这个程序有什么问题吗为什么运行就直接跳到 catch那里去了。我这程序主要是对数据库进行一个用户的添加求救！！！ --------------------编程问答-------------------- 把报错的堆栈信息打印出来,然后对症下药

catch(Exception ex)
            {
                MessageBox.Show(ex.message);
            }
--------------------编程问答-------------------- 数据库连接字符串错了。
比如：

oleDbConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + AppDomain.CurrentDomain.SetupInformation.ApplicationBase + "se.mdb;");

string conStr = @"Provider=Microsoft.Jet.OLEDB.4.0;C:\Documents and Settings\admin\My Documents\Visual Studio 2008\Projects\test\CMS_DataManager.mdb";

=>
string conStr = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Documents and Settings\admin\My Documents\Visual Studio 2008\Projects\test\CMS_DataManager.mdb";

--------------------编程问答-------------------- 连接字符串的，账户、密码呢？ --------------------编程问答-------------------- catch(Exception ex)

弹出ex.Message --------------------编程问答-------------------- this.mane.Text 不应在引号之内 --------------------编程问答--------------------

引用 5 楼 huangwenjia 的回复:

this.mane.Text 不应在引号之内

这里不是这样直接写进去的where strUserName="+this.mane.Text+";这样 --------------------编程问答-------------------- string i = "insert into SysBldUserDefine (strUserName,strUserPassword) values ('this.mane.Text','this.ke.Text')";
应该改成
string i = "insert into SysBldUserDefine (strUserName,strUserPassword) values ('“+this.mane.Text+”','“+this.ke.Text+”')"; --------------------编程问答-------------------- where strUserName=this.mane.Text
改成
where strUserName=‘“+this.mane.Text+”’

补充：.NET技术 ,  C#