简单问题：数据的重新绑定问题！！

[vinjuviva]

我在写一个日志编辑页面，页面加载的时候绑定各控件

protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["administrator"] == null)
        {
            Response.Redirect("login.aspx");
        }
        string logid = Request.QueryString["id"];
        string selectid = "select * from log where logid="+logid;
        SqlConnection sqlconn = SQL.sqlconn();
        sqlconn.Open();
        SqlCommand editlogid = new SqlCommand(selectid,sqlconn);
        SqlDataReader editlogid2 = editlogid.ExecuteReader();
        editlogid2.Read();
        title.Text = editlogid2["title"].ToString();
        logcontent.Value = editlogid2["content"].ToString();
        sort.Text = editlogid2["sort"].ToString();
        source.Text = editlogid2["source"].ToString();
        editlogid2.Close();
    }

为什么我点击按钮事件后还无取得修改后的值，仍然是页面初始化获得的值！怎样才能重新取值！！！
按钮事件：

protected void addlog_Click(object sender, EventArgs e)
    {
        string logtilel = title.Text;
        string content = logcontent.Value;
        string logsort =sort.Text;
        string sources = source.Text;
        string Times =Convert.ToString( DateTime.Now);
        if (logtilel == "这里写日志标题")
        {
            logtilel = "";
        }
        if (logtilel.Length<=0 || content.Length <= 0)
        {
            Message.Visible = true;
            Message.Text = "日志标题与日志内容为必填内容，其中一项的值为空";
        }
        else
        {
            SqlConnection sqlconn = SQL.sqlconn();
            sqlconn.Open();
            string strsql = "Insert Into log(title,content,sort,source,issuancetime)Values('" + logtilel + "','" + content + "','" + logsort + "','" + sources + "','" + Times + "')";
            SqlCommand myconn = new SqlCommand(strsql, sqlconn);
            myconn.ExecuteNonQuery();
            sqlconn.Close();
            title.Text = "这里写日志标题";
            logcontent.Value = "";
            source.Text = "";
            Message.Visible = false;
        }
    }

[sleet313]

protected void Page_Load(object sender, EventArgs e)
{

if (Session["administrator"] == null)
{
Response.Redirect("login.aspx");
}
if(!IsPostBack)
{
string logid = Request.QueryString["id"];
string selectid = "select * from log where logid="+logid;
SqlConnection sqlconn = SQL.sqlconn();
sqlconn.Open();
SqlCommand editlogid = new SqlCommand(selectid,sqlconn);
SqlDataReader editlogid2 = editlogid.ExecuteReader();
editlogid2.Read();
title.Text = editlogid2["title"].ToString();
logcontent.Value = editlogid2["content"].ToString();
sort.Text = editlogid2["sort"].ToString();
source.Text = editlogid2["source"].ToString();
editlogid2.Close();
}
}

[magicbacon]

要判断PostBack，因为每执行一个事件前都会先Page_Load，所以不加判断就会重新绑定初始数据~

    protected void Page_Load(object sender, EventArgs e)
    {
        if (Session["administrator"] == null)
        {
            Response.Redirect("login.aspx");
        }
        if (!IsPostBack) 
        {
            string logid = Request.QueryString["id"];
            string selectid = "select * from log where logid=" + logid;
            SqlConnection sqlconn = SQL.sqlconn();
            sqlconn.Open();
            SqlCommand editlogid = new SqlCommand(selectid, sqlconn);
            SqlDataReader editlogid2 = editlogid.ExecuteReader();
            editlogid2.Read();
            title.Text = editlogid2["title"].ToString();
            logcontent.Value = editlogid2["content"].ToString();
            sort.Text = editlogid2["sort"].ToString();
            source.Text = editlogid2["source"].ToString();
            editlogid2.Close();
        }
    }

[vinjuviva]

1楼2楼都正解，2楼多了文字解析使我明白了！！Thank You~~