获取文本框中的值

Question

问题如下：
在页面的后台load事件中给文本框赋值了
然后我要对文本框中的值进行修改再保存，可是修改之后不能获取修改后文本框中的内容，程序调试的时候发现 保存的程序中还是load事件赋的值 没有变化
    string no = "";
    protected void Page_Load(object sender, EventArgs e)
    {
               DbHelper db = new DbHelper();
        DbCommand cmd = db.GetSqlStringCommond("select top 1 * from companyinfo");
        DbDataReader reader = db.ExecuteReader(cmd);
        if (reader.Read())
        {
            cmpaddress.Text = reader["address"].ToString().Trim();
            cmpcode.Text = reader["code"].ToString().Trim();
            cmpcontactpeople.Text = reader["contactpeople"].ToString().Trim();
            cmpemail.Text = reader["email"].ToString().Trim();
            cmpfax.Text = reader["fax"].ToString().Trim();
            cmpname.Text = reader["companyname"].ToString().Trim();
            cmpphone.Text = reader["phone"].ToString().Trim();
            cmpqyln.Text = reader["qiyelinian"].ToString().Trim().Replace("$", "\r\n");
            cmptel.Text = reader["tel"].ToString();
            cmpjianjie.Text = reader["jianjie"].ToString().Replace("$", "\r\n");
            no = reader["infoid"].ToString().Trim();
        }
        else
        {
            MessageBox.Show(this, "用户名不存在！");
        }
    }
    protected void btnAdd_Click(object sender, EventArgs e)
    {
        try
        {
            DbHelper db = new DbHelper();
            DbCommand cmd = db.GetSqlStringCommond("update companyinfo set companyname=@cmpname,contactpeople=@cmpcontactpeople ,tel=@cmptel,"+
                                                   "phone=@cmpphone ,fax=@cmpfax,address=@cmpaddress,email=@cmpemail,code=@cmpcode,"+
                                                   "qiyelinian=@cmpqiyelinian,imgname=@cmpimgname,jianjie=@cmpjianjie" +
                                                   " where infoid=@id");
            db.AddInParameter(cmd, "@cmpname", DbType.String, cmpname.Text.Trim());
            db.AddInParameter(cmd, "@cmpcontactpeople", DbType.String, cmpcontactpeople.Text.Trim());
            db.AddInParameter(cmd, "@cmptel", DbType.String, cmptel.Text.Trim());
            db.AddInParameter(cmd, "@cmpphone", DbType.String, cmpphone.Text.Trim());
            db.AddInParameter(cmd, "@cmpfax", DbType.String, cmpfax.Text.Trim());
            db.AddInParameter(cmd, "@cmpaddress", DbType.String, cmpaddress.Text.Trim());
            db.AddInParameter(cmd, "@cmpemail", DbType.String, cmpemail.Text.Trim());
            db.AddInParameter(cmd, "@cmpcode", DbType.String, cmpcode.Text.Trim());
            db.AddInParameter(cmd, "@cmpimgname", DbType.String, imgupload.FileName);            string qiyelinian = this.cmpqyln.Text.Trim().Replace("\r\n", "$");
            string content = this.cmpjianjie.Text.Trim().Replace("\r\n", "$");            db.AddInParameter(cmd, "@cmpqiyelinian", DbType.String, qiyelinian);
            db.AddInParameter(cmd, "@cmpjianjie", DbType.String, content);
            db.AddInParameter(cmd, "@id", DbType.String, no);            if (db.ExecuteNonQuery(cmd) == 1)
            {
                MessageBox.Show(this, "成功修改");
            }
            else
            {
                MessageBox.Show(this, "修改失败,请重新修改！");
            }
        }
        catch (Exception ee)
        {
            MessageBox.Show(this, ee.ToString());
        }
    }

Answer 1

        if (!IsPostBack)
        { 
           cmpaddress.Text = reader["address"].ToString().Trim(); 
            cmpcode.Text = reader["code"].ToString().Trim(); 
            cmpcontactpeople.Text = reader["contactpeople"].ToString().Trim(); 
            cmpemail.Text = reader["email"].ToString().Trim(); 
            cmpfax.Text = reader["fax"].ToString().Trim(); 
            cmpname.Text = reader["companyname"].ToString().Trim(); 
            cmpphone.Text = reader["phone"].ToString().Trim(); 
            cmpqyln.Text = reader["qiyelinian"].ToString().Trim().Replace("$", "\r\n"); 
            cmptel.Text = reader["tel"].ToString(); 
            cmpjianjie.Text = reader["jianjie"].ToString().Replace("$", "\r\n"); } 

Answer 2

protected void Page_Load(object sender, EventArgs e) 
{ 
  if(!Page.IsPostBack)
  {
    你的代码
  }
}

Answer 3

把整个page_load里的东西都放在：
if (!IsPostBack)
        {
            //写你的代码
        }
中....

Answer 4

btnAdd_Click
刷新页面有执行了Page_Load中的赋值~~
可以放到
if (!IsPostBack) 
        { 
            //写你的代码 
        } 
中执行~

Answer 5

page_load事件中代码都放在if(!page.ispostback)中

Answer 6

if(!Page.IsPostBack) { 
    
  }