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asp.net - 通过代码隐藏将属性添加到 html 标记会导致错误类型 (System.Web.UI.HtmlControls.HtmlElement) 不兼容

转载 作者:搜寻专家 更新时间:2023-10-31 08:56:22 25 4
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当我尝试将属性添加到我的母版页中的 html 标记时:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" id="primtag" runat="server">

就像后面的代码一样:

prmimaryhtml_tag.Attributes.Add("lang", "en")

我收到这个错误:

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: The base class includes the field 'primtag', but its type (System.Web.UI.HtmlControls.HtmlElement) is not compatible with the type of control (System.Web.UI.HtmlControls.HtmlGenericControl).

Source Error:


Line 4:
Line 5: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Line 6: <html xmlns="http://www.w3.org/1999/xhtml" id="primtag" runat="server">
Line 7: <head id="Head1" runat="server">
Line 8: <title></title>

Source File: /main.master Line: 6

我还检查了 main.master.designer.vb,它包含这一行:

Protected WithEvents primtag As Global.System.Web.UI.HtmlControls.HtmlElement

现在,最奇怪的是:这段代码在我的本地机器上工作正常,但在我的生产服务器上却不行。我也不知道是什么导致了这种不同的行为。

我也看了这个帖子:set pages main html tag in c#

更新当我的情况如下:

main.master.designer.vb

 Protected WithEvents primtag As Global.System.Web.UI.HtmlControls.HtmlElement

main.master.aspx

<html xmlns="http://www.w3.org/1999/xhtml" ID="primtag" runat="server">

main.master.aspx.vb

评论这一行:

'primtag.Attributes.Add

我得到:

Parser Error

Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: The base class includes the field 'primtag', but its type (System.Web.UI.HtmlControls.HtmlElement) is not compatible with the type of control (System.Web.UI.HtmlControls.HtmlGenericControl).

Source Error:


Line 4:
Line 5: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
Line 6: <html xmlns="http://www.w3.org/1999/xhtml" ID="primtag" runat="server">
Line 7: <head id="Head1" runat="server">
Line 8: <title></title>

之后,我尝试将 main.master.designer.vb 文件中的那一行从 Protected WithEvents primtag As Global.System.Web.UI.HtmlControls.HtmlElement 更改为 Protected WithEvents primtag作为 Global.System.Web.UI.HtmlControls.HtmlGenericControl 在生产服务器上我得到:

对象引用未设置为对象的实例。

更新 2

可能和我的方案编译有关,我也查了这些帖子:

http://briancaos.wordpress.com/2013/08/07/system-web-ui-htmlcontrols-htmliframe-is-not-compatible-with-the-type-of-control-system-web-ui-htmlcontrols-htmlgenericcontrol/
https://connect.microsoft.com/VisualStudio/feedback/details/736011/iframe-parser-error
http://forums.asp.net/t/1884696.aspx?help+required+with+iframes+on+aspx
http://support.microsoft.com/kb/941824
http://forums.asp.net/t/1686949.aspx

然后我在本地机器上检查我的 IIS7.5 设置,那里的应用程序池设置为 ASP.NET4.0,与我的生产服务器上的相同。我在 Visual Studio 中的目标框架编译设置为 .NET Framework 4.5。

希望这能提供更多见解,使其发挥作用。请帮助:)

最佳答案

每个动态添加的属性可能都应该以任何特殊(例如,“xml”)前缀开头。

检查 this线程,这可能会有所帮助。

关于asp.net - 通过代码隐藏将属性添加到 html 标记会导致错误类型 (System.Web.UI.HtmlControls.HtmlElement) 不兼容,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/20060196/

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