expandoobject | 易学教程

Binding a GridView to a Dynamic or ExpandoObject object

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问题 I'm using Rob Conery's Massive ORM, and I haven't been able to bind the resulting ExpandoObject to a GridView . I did find another Stackoverflow question that suggests using a framework called impromptu, but I'm not sure if that would work for this. If you know it does, please provide a code sample to actually convert an ExpandoObject to something that the GridView control can bind to. Worst case scenario, has anyone implemented an additional method (that can be shared) for Massive to convert

Dynamically adding properties to an ExpandoObject

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I would like to dynamically add properties to a ExpandoObject at runtime. So for example to add a string property call NewProp I would like to write something like var x = new ExpandoObject(); x.AddProperty("NewProp", System.String); Is this easily possible? dynamic x = new ExpandoObject(); x.NewProp = string.Empty; Alternatively: var x = new ExpandoObject() as IDictionary<string, Object>; x.Add("NewProp", string.Empty); As explained here by Filip - http://www.filipekberg.se/2011/10/02/adding-properties-and-methods-to-an-expandoobject-dynamicly/ You can add a method too at runtime. x.Add(

Differences between ExpandoObject, DynamicObject and dynamic

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问题 What are the differences between System.Dynamic.ExpandoObject , System.Dynamic.DynamicObject and dynamic ? In which situations do you use these types? 回答1: The dynamic keyword is used to declare variables that should be late-bound. If you want to use late binding, for any real or imagined type, you use the dynamic keyword and the compiler does the rest. When you use the dynamic keyword to interact with a normal instance, the DLR performs late-bound calls to the instance's normal methods. The

How do I dynamically generate columns in a WPF DataGrid?

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问题 I am attempting to display the results of a query in a WPF datagrid. The ItemsSource type I am binding to is IEnumerable<dynamic> . As the fields returned are not determined until runtime I don\'t know the type of the data until the query is evaluated. Each \"row\" is returned as an ExpandoObject with dynamic properties representing the fields. It was my hope that AutoGenerateColumns (like below) would be able to generate columns from an ExpandoObject like it does with a static type but it

Dynamically adding properties to an ExpandoObject

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问题 I would like to dynamically add properties to a ExpandoObject at runtime. So for example to add a string property call NewProp I would like to write something like var x = new ExpandoObject(); x.AddProperty(\"NewProp\", System.String); Is this easily possible? 回答1: dynamic x = new ExpandoObject(); x.NewProp = string.Empty; Alternatively: var x = new ExpandoObject() as IDictionary<string, Object>; x.Add("NewProp", string.Empty); 回答2: As explained here by Filip - http://www.filipekberg.se/2011