我有这个标记代码:

<div id="rowIndirizzo" class="form">
    <label>
        Indirizzo:</label>
    <asp:DropDownList ID="ddlToponimo" CssClass="indirizzo" runat="server" DataTextField="Toponimo"
        DataValueField="Toponimo">
    </asp:DropDownList>
    <asp:TextBox ID="txtStrada" CssClass="textinputStrada" runat="server"></asp:TextBox>
    <asp:TextBox ID="txtNumCivico" CssClass="textinputCivico" runat="server"></asp:TextBox>
</div>
<div id="divCap" class="form">
    <label>
        CAP:</label>
    <asp:TextBox ID="txtCAP" CssClass="textinputCAP" runat="server"></asp:TextBox>
</div>
<asp:RequiredFieldValidator ID="rfvToponimo" CssClass="errore2" runat="server" ControlToValidate="ddlToponimo"
    ErrorMessage="Il campo toponimo dell'indirizzo è obbligatorio." Display="Dynamic"
    ValidationGroup="Step4_StruttPrivata1Step" Style="color: Red; display: block !important;"></asp:RequiredFieldValidator>
<asp:RequiredFieldValidator ID="rfvStrada" CssClass="errore2" runat="server" ControlToValidate="txtStrada"
    ErrorMessage="Il campo strada dell'indirizzo è obbligatorio." Display="Dynamic"
    ValidationGroup="Step4_StruttPrivata1Step" Style="color: Red; display: block !important;"></asp:RequiredFieldValidator>
<asp:RequiredFieldValidator ID="rfvNumCivico" CssClass="errore2" runat="server" ControlToValidate="txtNumCivico"
    ErrorMessage="Il campo numero civico dell'indirizzo è obbligatorio." …

我在以下环境中开发了一个应用程序(在我的错误中重命名为MyApplication for privacy):

• Monotouch 2.1
• MonoDevelop 2.4.2
• MacOS 10.6.8
• iOS SDK 4.3

工作正常.

现在我尝试使用MonoDevelop 2.8.8.4迁移到iOS 5.0/5.1和Monotouch 5.2.5.我的应用程序立即崩溃,出现以下错误:

堆栈跟踪:

at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication.UIApplicationMain (int,string[],intptr,intptr) <IL 0x0009f, 0xffffffff>
  at MonoTouch.UIKit.UIApplication.Main (string[],string,string) [0x00042] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:29
  at MonoTouch.UIKit.UIApplication.Main (string[]) [0x00000] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:34
  at MyApplication.Application.Main (string[]) [0x00000] in /Users/MyPC/Projects/Test/MyApplication/Main.cs:19
  at (wrapper runtime-invoke) <Module>.runtime_invoke_void_object (object,intptr,intptr,intptr) <IL 0x00050, 0xffffffff>

本机堆栈跟踪:

0   MyApplication                            0x000908fc mono_handle_native_sigsegv + 284
1   MyApplication                            0x00005c98 mono_sigsegv_signal_handler + 248
2   libSystem.B.dylib                   0x9138145b _sigtramp + 43
3   ???                                 0xffffffff 0x0 + 4294967295
4   libobjc.A.dylib                     0x02958753 …

我正在尝试对示例项目Cirrious.Conference进行更改.特别是在SessionView类和此类的Touch View中

https://github.com/slodge/MvvmCross-Tutorials/blob/master/Sample%20-%20CirriousConference/Cirrious.Conference.Core/ViewModels/SessionLists/BaseSessionListViewModel.cs

方法

protected void NavigateToSession(Session session)
{
 ShowViewModel<SessionViewModel>(new { key = session.Key });
}

我想打开一个UIWebView(在应用程序中)绑定LoadRequest与类Session的属性(假设有一个属性URL ...).我在SessionView中创建了一个UIWebView对象,但是不可能创建一个Swisse绑定...也许可以使用customBinding ......

我怎么能这样做？

我正在尝试将我的项目从Mac上的Xamarin Studio移植到Windows 7上的Visual Studio 2012.在Mac和XS上工作正常.在VisualStudio 2012上,我遇到了以下两个问题:

错误3'System.Net.WebHeaderCollection'不包含'Add'的定义,并且没有扩展方法'Add'接受类型'System.Net.WebHeaderCollection'的第一个参数可以找到(你是否缺少using指令或者程序集引用？)C:\ Users\user\Documents\Visual Studio 2012\Projects\MyProject\MyProject.Core\Services\MyProjectService.cs

错误4'System.Net.HttpWebRequest'不包含'GetResponse'的定义,并且没有可以找到接受类型'System.Net.HttpWebRequest'的第一个参数的扩展方法'GetResponse'(你是否缺少using指令或者程序集引用？)C:\ Users\user\Documents\Visual Studio 2012\Projects\MyProject\MyProject.Core\Services\MyProjectService.cs

在那段代码上:

    var request = WebRequest.Create("https://www.myaddress.com/test/") as HttpWebRequest;
    request.Method = "GET";
    request.Accept = "application/json";
    request.Headers.Add(HttpRequestHeader.Cookie,"mycookievalue");

    // Get response  
    using (var response = request.GetResponse() as HttpWebResponse)
    {
        // Get the response stream  
        var reader = new StreamReader(response.GetResponseStream());
        content = reader.ReadToEnd();
    }

我怎么能解决它？

我有一个有 60 列的表。其中 20 个是“NotEmpty”，6 个是“NotNull”。

我有空值和 Null 值（在我的情况下总是意味着“没有数据”）。我想将列与一种类型的约束统一起来。

我读过空值很便宜（以字节大小计）。那么也许使用 NotEmpty 约束？但也许 NotNull 约束表现更好？coalesce()或者也许在检索数据时同时拥有值和使用会更好？

Postgres 9.x 中的约束CHECK成本是多少？你的经历怎么样？有什么基准吗？INSERTUPDATE

我已经创建了一个PCL项目,无论何时我尝试添加来自Nuget的引用我都有这样的错误:(所有包都会出现此错误)

无法安装包'Microsoft.Bcl.Build 1.0.13'.您正在尝试将此软件包安装到以"portable-Unsupported"为目标的项目中,但该软件包不包含与该框架兼容的任何程序集引用或内容文件.有关更多信息,请与软件包作者联系.System.InvalidOperationException:无法安装包'Microsoft.Bcl.Build 1.0.13'.您正在尝试将此软件包安装到以"portable-Unsupported"为目标的项目中,但该软件包不包含与该框架兼容的任何程序集引用或内容文件.有关更多信息,请与软件包作者联系.在NuGet.ProjectManager.ExtractPackageFilesToProject(IPackage包)[0x00000]中:0在NuGet.ProjectManager.AddPackageReferenceToProject(IPackage包)[0x00000] in:0在NuGet.ProjectManager.Execute(NuGet.PackageOperation操作)[0x00000] in:0
在NuGet.ProjectManager.Execute(IPackage包,IPackageOperationResolver解析器)[0x00000]中:0在NuGet.ProjectManager.AddPackageReference(IPackage包,布尔ignoreDependencies,布尔allowPrereleaseVersions)[0x00000] in:0在NuGet.ProjectManager.AddPackageReference(系统. String packageId,NuGet.SemanticVersion version,Boolean ignoreDependencies,Boolean allowPrereleaseVersions)[0x00000] in:0 at ICSharpCode.PackageManagement.SharpDevelopPackageManager.AddPackageReference(IPackage package,Boolean ignoreDependencies,Boolean allowPrereleaseVersions)[0x00000] in:0 at ICSharpCode.PackageManagement.SharpDevelopPackageManager .InstallPackage(IPackage包,ICSharpCode.PackageManagement.InstallPackageAction installAction)[0x00000] in:0,ICSharpCode.PackageManagement.PackageManagementProject.InstallPackage(IPackage package,ICSharpCode.PackageManagement.InstallPackageAction installAction)[0x00000] in:0 at ICSharpCode.PackageManagement.InstallPackageAction.ExecuteCore()[0x00000] in:0 at ICSharpCode.PackageManagement.ProcessPackageAction.Execute()[0x00000] in:0,ICSharpCode.PackageManagement.PackageActionRunner.Run(IPackageAction action)[0x00000] in:0 at ICSharpCode.PackageManagement.PackageViewModel.InstallPackage(IEnumerable`1 packageOperations)[0x00000] in:0
at ICSharpCode.PackageManagement.PackageViewModel.InstallPackage()[0x00000] in:0 at ICSharpCode.PackageManagement.PackageViewModel.TryInstallingPackage()

[0x00000] in:0

这是关于我的环境的信息

=== Xamarin Studio ===

Version 4.2.2 (build 2)
Runtime:
    Mono 3.2.5 ((no/964e8f0)
    GTK+ 2.24.20 theme: Raleigh
    GTK# (2.12.0.0)
    Package version: 302050000

=== Xamarin.Android ===

Version: 4.10.1 (Business Edition)
Android SDK: /Users/luigisaggese/Library/Developer/Xamarin/android-sdk-mac_x86
    Supported …

今天,我收到了Apple Developer Support的这封电子邮件:

如果要更新iPhone 5和iPod touch(第5代)的应用程序,则必须提供其他屏幕截图以支持App Store的新屏幕尺寸.新截图尺寸为:

• 640 x 1136(肖像)
• 640 x 1096(肖像)
• 1136 x 640(风景)
• 1136 x 600(风景)

但是没有支持此分辨率(在iPhone应用程序选项中)的MonoDevelop版本(没有alpha或beta版本).在这种情况下,我可以做什么来提交符合图标的应用程序？

我在XCode上发现了同样的问题

无法在iOS 6中处理方向？

我还没有找到Mono映射方法

this.windows.setRootViewController(viewControllerObj);

Mono如何修复它？