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System.MissingFieldException F# snippet (#7793)
* MissingFieldException F# snippet * Add snippet refs
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‎snippets/fsharp/System/MissingFieldException/Overview/MissingMethodException.fs

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//<snippet1>
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open System
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open System.Reflection
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type App = class end
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//<snippet2>
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try
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// Attempt to call a static DoSomething method defined in the App class.
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// However, because the App class does not define this method,
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// a MissingMethodException is thrown.
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typeof<App>.InvokeMember("DoSomething", BindingFlags.Static ||| BindingFlags.InvokeMethod, null, null, null)
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|> ignore
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with :? MissingMethodException as e ->
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// Show the user that the DoSomething method cannot be called.
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printfn $"Unable to call the DoSomething method: {e.Message}"
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//</snippet2>
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//<snippet3>
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try
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// Attempt to access a static AField field defined in the App class.
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// However, because the App class does not define this field,
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// a MissingFieldException is thrown.
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typeof<App>.InvokeMember("AField", BindingFlags.Static ||| BindingFlags.SetField, null, null, [| box 5 |])
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|> ignore
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with :? MissingFieldException as e ->
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// Show the user that the AField field cannot be accessed.
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printfn $"Unable to access the AField field: {e.Message}"
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//</snippet3>
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//<snippet4>
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try
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// Attempt to access a static AnotherField field defined in the App class.
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// However, because the App class does not define this field,
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// a MissingFieldException is thrown.
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typeof<App>.InvokeMember("AnotherField", BindingFlags.Static ||| BindingFlags.GetField, null, null, null)
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|> ignore
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with :? MissingMemberException as e ->
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// Notice that this code is catching MissingMemberException which is the
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// base class of MissingMethodException and MissingFieldException.
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// Show the user that the AnotherField field cannot be accessed.
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printfn $"Unable to access the AnotherField field: {e.Message}"
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//</snippet4>
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// This code example produces the following output:
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// Unable to call the DoSomething method: Method 'App.DoSomething' not found.
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// Unable to access the AField field: Field 'App.AField' not found.
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// Unable to access the AnotherField field: Field 'App.AnotherField' not found.
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//</snippet1>

‎snippets/fsharp/System/MissingFieldException/Overview/fs.fsproj

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net6.0</TargetFramework>
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</PropertyGroup>
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<ItemGroup>
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<Compile Include="MissingMethodException.fs" />
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</ItemGroup>
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</Project>

‎xml/System/MissingFieldException.xml

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:::code language="cpp" source="~/snippets/cpp/VS_Snippets_CLR/MissingMethodException/cpp/MissingMethodException.cpp" id="Snippet1":::
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:::code language="csharp" source="~/snippets/csharp/System/MissingFieldException/Overview/MissingMethodException.cs" interactive="try-dotnet" id="Snippet1":::
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:::code language="fsharp" source="~/snippets/fsharp/System/MissingFieldException/Overview/MissingMethodException.fs" id="Snippet1":::
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:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR/MissingMethodException/vb/missingmethodexception.vb" id="Snippet1":::
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]]></format>
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:::code language="cpp" source="~/snippets/cpp/VS_Snippets_CLR/MissingMethodException/cpp/MissingMethodException.cpp" id="Snippet3":::
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:::code language="csharp" source="~/snippets/csharp/System/MissingFieldException/Overview/MissingMethodException.cs" id="Snippet3":::
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:::code language="fsharp" source="~/snippets/fsharp/System/MissingFieldException/Overview/MissingMethodException.fs" id="Snippet3":::
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:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR/MissingMethodException/vb/missingmethodexception.vb" id="Snippet3":::
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]]></format>

‎xml/System/MissingMemberException.xml

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:::code language="cpp" source="~/snippets/cpp/VS_Snippets_CLR/MissingMethodException/cpp/MissingMethodException.cpp" id="Snippet1":::
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:::code language="csharp" source="~/snippets/csharp/System/MissingFieldException/Overview/MissingMethodException.cs" interactive="try-dotnet" id="Snippet1":::
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:::code language="fsharp" source="~/snippets/fsharp/System/MissingFieldException/Overview/MissingMethodException.fs" id="Snippet1":::
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:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR/MissingMethodException/vb/missingmethodexception.vb" id="Snippet1":::
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]]></format>
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:::code language="cpp" source="~/snippets/cpp/VS_Snippets_CLR/MissingMethodException/cpp/MissingMethodException.cpp" id="Snippet4":::
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:::code language="csharp" source="~/snippets/csharp/System/MissingFieldException/Overview/MissingMethodException.cs" id="Snippet4":::
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:::code language="fsharp" source="~/snippets/fsharp/System/MissingFieldException/Overview/MissingMethodException.fs" id="Snippet4":::
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:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR/MissingMethodException/vb/missingmethodexception.vb" id="Snippet4":::
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]]></format>

‎xml/System/MissingMethodException.xml

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:::code language="cpp" source="~/snippets/cpp/VS_Snippets_CLR/MissingMethodException/cpp/MissingMethodException.cpp" id="Snippet1":::
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:::code language="csharp" source="~/snippets/csharp/System/MissingFieldException/Overview/MissingMethodException.cs" interactive="try-dotnet" id="Snippet1":::
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:::code language="fsharp" source="~/snippets/fsharp/System/MissingFieldException/Overview/MissingMethodException.fs" id="Snippet1":::
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:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR/MissingMethodException/vb/missingmethodexception.vb" id="Snippet1":::
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]]></format>
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:::code language="cpp" source="~/snippets/cpp/VS_Snippets_CLR/MissingMethodException/cpp/MissingMethodException.cpp" id="Snippet2":::
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:::code language="csharp" source="~/snippets/csharp/System/MissingFieldException/Overview/MissingMethodException.cs" id="Snippet2":::
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:::code language="fsharp" source="~/snippets/fsharp/System/MissingFieldException/Overview/MissingMethodException.fs" id="Snippet2":::
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:::code language="vb" source="~/snippets/visualbasic/VS_Snippets_CLR/MissingMethodException/vb/missingmethodexception.vb" id="Snippet2":::
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]]></format>

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