基类包括字段，但类型与控件类型不兼容 [英] Base class includes field but type not compatible with type of control

问题描述

The base class includes the field 'lbl', but its type (web.App_Code.CustomLabelControl) is not compatible with the type of control (web.App_Code.CustomLabelControl).

我以前用相同的方式做了许多自定义控件，但是，此错误使我发疯.我在App_Code目录中有一个带有以下类的Web应用程序项目，在web.config中有一个用于该类控件的tagprefix引用. 我现在该怎么办?

I had done many custom controls before the same way but Hell this error is driving me nuts. I have a web application project with the below class in App_Code directory a tagprefix reference in web.config for the control in class. What do I do now?

<system.web>
    <pages>
        <controls>
            <add namespace="web.App_Code" tagPrefix="CControls"/>...

标记

<form id="form1" runat="server">
<div>
    <CControls:CustomLabelControl runat="server" OnClickText="Welcome" ID="lbl">
    </CControls:CustomLabelControl>
</div>
</form>

类文件

namespace web.App_Code
{
    public class CustomLabelControl : Control, IPostBackEventHandler, IPostBackDataHandler
    {
        private string _onClickText;

        public CustomLabelControl()
        {

        }

        public string OnClickText
        {
            get { return _onClickText; }
            set { _onClickText = value; }
        }

        public void RaisePostBackEvent(string eventArgument)
        {
            throw new System.NotImplementedException();
        }


        public bool LoadPostData(string postDataKey, NameValueCollection postCollection)
        {
            throw new System.NotImplementedException();
        }


        public void RaisePostDataChangedEvent()
        {
            throw new System.NotImplementedException();
        }
    }
}

尝试了这些

• http://support.microsoft.com/kb/919284

  基类包含字段'ScriptManager1'，但是其类型(System.Web.UI.ScriptManager)与控件的类型(System.Web.UI.ScriptManager)不兼容

  推荐答案

  也尝试指定程序集名称:

  Try specifying the assembly name too:

  <add tagPrefix="CControls" namespace="web.App_Code" assembly="web.App_Code" />
  

  为了清楚起见，我会考虑为您的自定义控件创建一个专用的命名空间.也许像web.App_Code.CustomControls:

  I would consider creating a dedicated namespace for your custom controls, just for the sake of clarity. Maybe something like web.App_Code.CustomControls:

  <add tagPrefix="CControls" namespace="web.App_Code.CustomControls" assembly="web.App_Code.CustomControls" />
  

  这篇关于基类包括字段，但类型与控件类型不兼容的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！