65 lines
1.9 KiB
C#
65 lines
1.9 KiB
C#
//----------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//----------------------------------------------------------------
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namespace System.Activities.Statements
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{
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using System;
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using System.ComponentModel;
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using System.IO;
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using System.Runtime;
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using System.Activities.Validation;
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using System.Collections.Generic;
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using System.Windows.Markup;
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using System.Collections.ObjectModel;
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[ContentProperty("Text")]
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public sealed class WriteLine : CodeActivity
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{
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public WriteLine()
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{
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}
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[DefaultValue(null)]
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public InArgument<TextWriter> TextWriter
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{
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get;
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set;
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}
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[DefaultValue(null)]
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public InArgument<string> Text
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{
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get;
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set;
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}
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protected override void CacheMetadata(CodeActivityMetadata metadata)
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{
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RuntimeArgument textArgument = new RuntimeArgument("Text", typeof(string), ArgumentDirection.In);
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metadata.Bind(this.Text, textArgument);
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RuntimeArgument textWriterArgument = new RuntimeArgument("TextWriter", typeof(TextWriter), ArgumentDirection.In);
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metadata.Bind(this.TextWriter, textWriterArgument);
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metadata.SetArgumentsCollection(
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new Collection<RuntimeArgument>
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{
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textArgument,
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textWriterArgument
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});
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}
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protected override void Execute(CodeActivityContext context)
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{
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TextWriter writer = this.TextWriter.Get(context);
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if (writer == null)
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{
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writer = context.GetExtension<TextWriter>() ?? Console.Out;
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}
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Fx.Assert(writer != null, "Writer should fallback to Console.Out and never be null");
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writer.WriteLine(this.Text.Get(context));
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}
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}
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}
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