本文整理汇总了C#中IEdmTypeReference.IsNullable方法的典型用法代码示例。如果您正苦于以下问题：C# IEdmTypeReference.IsNullable方法的具体用法？C# IEdmTypeReference.IsNullable怎么用？C# IEdmTypeReference.IsNullable使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类IEdmTypeReference的用法示例。
在下文中一共展示了IEdmTypeReference.IsNullable方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: CanConvertTo
internal static bool CanConvertTo(SingleValueNode sourceNodeOrNull, IEdmTypeReference sourceReference, IEdmTypeReference targetReference)
{
Debug.Assert(sourceReference != null, "sourceReference != null");
Debug.Assert(targetReference != null, "targetReference != null");
//// Copy of the ResourceQueryParser.ExpressionParser.IsCompatibleWith method.
if (sourceReference.IsEquivalentTo(targetReference))
{
return true;
}
if (targetReference.IsODataComplexTypeKind() || targetReference.IsODataEntityTypeKind())
{
// for structured types, use IsAssignableFrom
return EdmLibraryExtensions.IsAssignableFrom(
(IEdmStructuredType)targetReference.Definition,
(IEdmStructuredType)sourceReference.Definition);
}
//// This rule stops the parser from considering nullable types as incompatible
//// with non-nullable types. We have however implemented this rule because we just
//// access underlying rules. C# requires an explicit .Value access, and EDM has no
//// nullablity on types and (at the model level) implements null propagation.
////
//// if (sourceReference.IsNullable && !targetReference.IsNullable)
//// {
//// return false;
//// }
if (sourceReference.IsEnum() && targetReference.IsEnum())
{
if (sourceReference.Definition.IsEquivalentTo(targetReference.Definition))
{
return targetReference.IsNullable() || (!sourceReference.IsNullable());
}
return false;
}
IEdmPrimitiveTypeReference sourcePrimitiveTypeReference = sourceReference.AsPrimitiveOrNull();
IEdmPrimitiveTypeReference targetPrimitiveTypeReference = targetReference.AsPrimitiveOrNull();
if (sourcePrimitiveTypeReference == null || targetPrimitiveTypeReference == null)
{
return false;
}
return MetadataUtilsCommon.CanConvertPrimitiveTypeTo(sourceNodeOrNull, sourcePrimitiveTypeReference.PrimitiveDefinition(), targetPrimitiveTypeReference.PrimitiveDefinition());
}