https://www.heckjj.com/index.php zh-cn https://www.heckjj.com/asp-net1-and-net2-textbox-html/ Heck <@hecks.tk> Tue, 21 Sep 2010 07:43:03 +0000 https://www.heckjj.com/asp-net1-and-net2-textbox-html/ 有时候，我们不希望用户直接编辑TextBox，而是希望通过客户端脚本的方式来设置内容，一般的做法是设置TextBox的属性ReadOnly 为true。但在ASP.NET 2.0里有了变化，设置了ReadOnly为true的TextBox，在服务器端不能通过Text属性获取在客户端设置的新内容，在Reflector 里比较一下LoadPostData的实现

.NET 1.1中:
bool IPostBackDataHandler.LoadPostData(string postDataKey, NameValueCollection postCollection) {       string text1 = this.Text;       string text2 = postCollection[postDataKey];       if (!text1.Equals(text2))       {             this.Text = text2;             return true;       }       return false; }
.NET 2.0中:
protected virtual bool LoadPostData(string postDataKey, NameValueCollection postCollection) {       base.ValidateEvent(postDataKey);       string text1 = this.Text;       string text2 = postCollection[postDataKey];       if (!this.ReadOnly && !text1.Equals(text2, StringComparison.Ordinal))       {             this.Text = text2;             return true;       }       return false; }

就可以看出，如果设置了ReadOnly为true，从客户端传回的新的值是不被设置到Text属性的。

想要保持.NET 1.*中的行为，建议的做法是设置客户端属性ContentEditable=false，参考

SYSK 118: ReadOnly or ContentEditable?
http://blogs.msdn.com/irenak/archive/2006/05/03/589085.aspx

其实如果是设置客户端属性的话，设置客户端的readonly属性应该也是可以的:

TextBox1.Attributes["readonly"] = "true";
Tags - .net , asp.net , textbox ]]> https://www.heckjj.com/asp-net1-and-net2-textbox-html/#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 https://www.heckjj.com/asp-net1-and-net2-textbox-html/#blogcomment