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ListInitExpression Class
Visual Studio 2008
Represents a constructor call that has a collection initializer.
Assembly: System.Core (in System.Core.dll)
The following example creates a ListInitExpression that represents the initialization of a new dictionary instance that has two key-value pairs.
Dim tree1 As String = "maple" Dim tree2 As String = "oak" Dim addMethod As System.Reflection.MethodInfo = _ Type.GetType("System.Collections.Generic.Dictionary`2[System.Int32, System.String]").GetMethod("Add") ' Create two ElementInit objects that represent the ' two key-value pairs to add to the Dictionary. Dim elementInit1 As System.Linq.Expressions.ElementInit = _ System.Linq.Expressions.Expression.ElementInit( _ addMethod, _ System.Linq.Expressions.Expression.Constant(tree1.Length), _ System.Linq.Expressions.Expression.Constant(tree1)) Dim elementInit2 As System.Linq.Expressions.ElementInit = _ System.Linq.Expressions.Expression.ElementInit( _ addMethod, _ System.Linq.Expressions.Expression.Constant(tree2.Length), _ System.Linq.Expressions.Expression.Constant(tree2)) ' Create a NewExpression that represents constructing ' a new instance of Dictionary(Of Integer, String). Dim newDictionaryExpression As System.Linq.Expressions.NewExpression = _ System.Linq.Expressions.Expression.[New](Type.GetType("System.Collections.Generic.Dictionary`2[System.Int32, System.String]")) ' Create a ListInitExpression that represents initializing ' a new Dictionary(Of T) instance with two key-value pairs. Dim listInitExpression As System.Linq.Expressions.ListInitExpression = _ System.Linq.Expressions.Expression.ListInit( _ newDictionaryExpression, _ elementInit1, _ elementInit2) Console.WriteLine(listInitExpression.ToString()) ' This code produces the following output: ' ' new Dictionary`2() {Void Add(Int32, System.String)(5,"maple"), ' Void Add(Int32, System.String)(3,"oak")
Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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