管理模块/教师信息修改.aspx.cs

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using System;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class 教师信息修改 : System.Web.UI.Page
{
    public string sqlconn;
    DataRow dtr;
    SqlDataAdapter myadapter;
    SqlCommandBuilder scb;
    DataSet myDataSet;
    SqlConnection mysqlconnection;
    int returnValue;
    DataTable tb;
    int numberOfRow;
    protected void Page_Load(object sender, EventArgs e)
    {
        sqlconn = "server=.;database=学生成绩智能管理系统;Integrated Security=True;";
        mysqlconnection = new SqlConnection(sqlconn);
        SqlCommand mysqlcommand = mysqlconnection.CreateCommand();
        mysqlcommand.CommandText = "select * from 教师表 where 教师编号=" + "'" + TextBox1.Text + "'";
        myadapter = new SqlDataAdapter();
        myadapter.SelectCommand = mysqlcommand;
        myDataSet = new DataSet();
        mysqlconnection.Open();
        numberOfRow = myadapter.Fill(myDataSet, "教师表");
        mysqlconnection.Close();
        tb = myDataSet.Tables["教师表"];
        Button2.Enabled = false;
        Button3.Enabled = false;
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        if (numberOfRow != 0)
        {
            dtr = tb.Rows[0];
            Button2.Enabled = true;
            Button3.Enabled = true;
            TextBox2.Text = Convert.ToString(dtr["教师编号"]);
            TextBox3.Text = Convert.ToString(dtr["姓名"]);
            TextBox4.Text = Convert.ToString(dtr["性别"]);
            TextBox5.Text = Convert.ToString(dtr["出生日期"]);
            TextBox6.Text = Convert.ToString(dtr["院系名称"]);
            TextBox7.Text = Convert.ToString(dtr["职称"]);
            TextBox8.Text = Convert.ToString(dtr["学历"]);
            TextBox9.Text = Convert.ToString(dtr["政治面貌"]);
            TextBox10.Text = Convert.ToString(dtr["备注"]);
        }
        else
        {
            Button2.Enabled = false;
            Button3.Enabled = false;