FormView_Load被覆盖C＃ASP.NET

Question

我有一个formview的负载事件只是决定停止工作。我做了一些调试，发现它到达代码，但无论什么原因，我在加载事件中添加的属性不再显示在屏幕上。就好像在formview的加载事件之后发生了一些事情，在没有任何额外属性的情况下重新加载它。我在停止工作之前完成的唯一修改是在它之前的页面中添加了一个会话变量。这不应该导致如此剧烈的变化。

这里是我的代码：

protected void FormView1_Load(object sender, EventArgs e) 
{ 
    RadioButton rbinjury = (RadioButton)FormView1.FindControl("rbinjury"); 
    RadioButton rbproperty = (RadioButton)FormView1.FindControl("rbproperty"); 
    RadioButton rbboth = (RadioButton)FormView1.FindControl("rbboth"); 
    RadioButton rbyes = (RadioButton)FormView1.FindControl("rbyes"); 
    RadioButton rbno = (RadioButton)FormView1.FindControl("rbno"); 
    RadioButton rbyes2 = (RadioButton)FormView1.FindControl("rbyes2"); 
    RadioButton rbno2 = (RadioButton)FormView1.FindControl("rbno2"); 
    RadioButton rbam = (RadioButton)FormView1.FindControl("rbam"); 
    RadioButton rbpm = (RadioButton)FormView1.FindControl("rbpm"); 

    TextBox txtdate = (TextBox)FormView1.FindControl("txtdate"); 
    DropDownList ddlhour = (DropDownList)FormView1.FindControl("ddlhour"); 
    DropDownList ddltime = (DropDownList)FormView1.FindControl("ddltime"); 
    if (FormView1.CurrentMode == FormViewMode.Insert || FormView1.CurrentMode == FormViewMode.Edit) 
    { 
     txtdate.Attributes.Add("onfocus", "unfocus();"); 
     locList.Attributes.Add("onChange", "postBack();"); 
     ddlhour.Items.Insert(0, new ListItem("Hour", "0")); 
     ddlhour.Items.Insert(1, new ListItem("12", "12")); 
     ddltime.Items.Insert(0, new ListItem("Minute", "0")); 
     for (int i = 1; i < 12; i++) 
     { 
      String hour = Convert.ToString(i); 
      ddlhour.Items.Add(new ListItem(hour, hour)); 
     } 

     for (int i = 0; i < 61; i++) 
     { 
      String time = ""; 
      if (i < 10) 
      { 
       time = ":0" + Convert.ToString(i); 
      } 
      else 
      { 
       time = ":" + Convert.ToString(i); 
      } 
      ddltime.Items.Add(new ListItem(time, time)); 
     } 
     //-----------------------------------------handle radio buttons---------------------------------------------------------------- 
     rbinjury.Attributes.Add("Onclick", "radio('rbinjury','result');"); 
     rbproperty.Attributes.Add("Onclick", "radio('rbproperty','result');"); 
     rbboth.Attributes.Add("Onclick", "radio('rbboth','result');"); 

     rbyes.Attributes.Add("Onclick", "radio('rbyes','inj');"); 
     rbno.Attributes.Add("Onclick", "radio('rbno','inj');"); 

     rbyes2.Attributes.Add("Onclick", "radio('rbyes2','dmg');"); 
     rbno2.Attributes.Add("Onclick", "radio('rbno2','dmg');"); 

     rbam.Attributes.Add("Onclick", "radio('rbam','time');"); 
     rbpm.Attributes.Add("Onclick", "radio('rbpm','time');"); 
    }} 

任何想法会导致负载情况下停止工作？如果我在页面的保存状态完成事件中放置相同的代码，它确实有效，但我不应该...

Answer 1

您需要使用formview Databound事件而不是formview加载事件来设置值，请尝试使用 这

protected void frm_DataBound(object sender, EventArgs e) 
{ 
    if (frm.CurrentMode == FormViewMode.Edit) 
    { 
     TextBox txtdate = (TextBox)frm.FindControl("txtdate"); 
     txtdate.Attributes.Add("", ""); 
    } 
} 

也检查这些线程。 ASP.NET Can not Change Visibility of a Formview control FormView.FindControl(): object reference error