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/