新手 求助求助 C# 遇到点小问题 求各位大大帮忙
今天编写了C#的添加学生信息的窗体， 运行时 加上 try-catch 不会跳出，但不会执行添加学生信息的代码 不加 try - catch 则会在 int count = (int)comm.ExecuteNonQuery(); 这里报错，真心求大大们帮忙，小生在此谢过。


代码如下

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.SqlClient;

namespace WindowsFormsApplication1
{
public partial class HackStuInfo : Form
{
public HackStuInfo()
{
InitializeComponent();
}

DBHelper db = new DBHelper();

private void gb_2_Enter(object sender, EventArgs e)
{

}

private void gb2_cb1_SelectedIndexChanged(object sender, EventArgs e)
{

}

private void gb_1_Enter(object sender, EventArgs e)
{

}

private void HackStuInfo_Load(object sender, EventArgs e)
{
BindGrade();



}

//填充年级数据

public bool BindGrade()
{
try
{

//年级选择框默认
gb2_cb1.SelectedIndex = 0;

//向年级选择框填充数据
string sql = "select COUNT(*) as 人数 ,StuGrade from Student Group by StuGrade";

SqlCommand comm = new SqlCommand(sql, db.Connection);

db.OpenConnection();
SqlDataReader reader = comm.ExecuteReader();
while (reader.Read())
{
string gradeid = reader["StuGrade"].ToString();
this.gb2_cb1.Items.Add(gradeid);
}
reader.Close();
return true;

}
catch (Exception)
{

MessageBox.Show("系统发生错误");
return false;
}
}

//验证编辑输入
public bool CheckInput()
{
try
{
//获得输入的值
#region
string Pwd = gb_1_tb2.Text.Trim();
string Pwd2 = gb_1_tb3.Text.Trim();
Name = gb2_tb1.Text.Trim();
string Sex;
string Grade = gb2_cb1.Text.Trim();
string Phone = gb2_tb2.Text.Trim();
string Address = gb2_tb3.Text.Trim();
string Email = gb2_tb4.Text.Trim();

//判断返回的男女值
if (this.gb_2_rb1_male.Checked)
{
Sex = "男";
}
else
{
Sex = "女";
}

#endregion


//判断输入
#region
if (Pwd.Equals(string.Empty) && Name.Equals(string.Empty) &&
Grade.Equals(string.Empty) && Address.Equals(string.Empty))
{
MessageBox.Show("您输入的其中一项为空，请输入！", "消息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

return false;
}
else if (Pwd != Pwd2)
{
MessageBox.Show("重复输入验证的密码有误，请重新输入！", "消息提示");
return false;
}
#endregion


//执行添加学生操作
#region
else
{

//声明sQL语句
string pwd = string.Format(" insert into Student (StuPwd,StuName,StuSex,StuGrade,StuPhone,StuAddress,StuEmail) " +
" Values ('{0}','{1}','{2}','{3}','{4}','{5}','{6}' ", Pwd, Name, Sex, Grade, Phone, Address, Email);

//执行新建学生信息

db.OpenConnection();

SqlCommand comm = new SqlCommand(pwd, db.Connection);
int count = (int)comm.ExecuteNonQuery();

if (count > 0)
{
//填充学号
#region
StringBuilder sb = new StringBuilder();
sb.AppendFormat("select StuId from Student where StuName = '" + this.Name + "' ");
SqlCommand com = new SqlCommand(sb.ToString(), db.Connection);
db.OpenConnection();

SqlDataReader read = com.ExecuteReader();
if (read.Read())
{
string stuid = read["StuId"].ToString();
this.gb_1_tb1.Text = stuid;
MessageBox.Show("创建新学员信息成功！", "消息提示", MessageBoxButtons.OK, MessageBoxIcon.Information);

}
#endregion

}

return true;

}
#endregion
}
catch (Exception )
{
MessageBox.Show("系统发生错误！请稍后再试。");
return false;
}
finally
{
db.CloseConnection();
}
}

private void hsi_bt_save_Click(object sender, EventArgs e)
{
this.CheckInput();




}

}
}


[解决办法]
string pwd = string.Format(" insert into Student (StuPwd,StuName,StuSex,StuGrade,StuPhone,StuAddress,StuEmail) " +
" Values ('{0}','{1}','{2}','{3}','{4}','{5}','{6}' ", Pwd, Name, Sex, Grade, Phone, Address, Email);
有没有发现这句话values少个）