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Cleaning up sprinkled null checks and adding it to a centralized place - FromStringExpression

This commit is contained in:
sornaks 2014-04-29 13:51:25 -07:00
parent 488ec2f52e
commit e0592d01af
2 changed files with 10 additions and 15 deletions
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7
src/Microsoft.AspNet.Mvc.Core/Rendering/Expressions/ExpressionMetadataProvider.cs
View File

@ -69,10 +69,15 @@ namespace Microsoft.AspNet.Mvc.Rendering.Expressions
return GetMetadataFromProvider(modelAccessor, typeof(TValue), propertyName, containerType, metadataProvider);
}
public static ModelMetadata FromStringExpression([NotNull] string expression,
public static ModelMetadata FromStringExpression(string expression,
[NotNull] ViewDataDictionary viewData,
IModelMetadataProvider metadataProvider)
{
if(string.IsNullOrEmpty(expression))
{
return viewData.ModelMetadata;
}
if (expression.Length == 0)
{
// Empty string really means "model metadata for the current model"

18
src/Microsoft.AspNet.Mvc.Core/Rendering/Html/HtmlHelper.cs
View File

@ -254,13 +254,8 @@ namespace Microsoft.AspNet.Mvc.Rendering
/// <inheritdoc />
public HtmlString DisplayName(string expression)
{
var modelMetadata = string.IsNullOrEmpty(expression) ?
ViewData.ModelMetadata :
ExpressionMetadataProvider.FromStringExpression(
expression,
ViewData,
MetadataProvider);
return GenerateDisplayName(modelMetadata, expression);
var metadata = ExpressionMetadataProvider.FromStringExpression(expression, ViewData, MetadataProvider);
return GenerateDisplayName(metadata, expression);
}
@ -299,14 +294,9 @@ namespace Microsoft.AspNet.Mvc.Rendering
/// <inheritdoc />
public HtmlString Label(string expression, string labelText, object htmlAttributes)
{
var modelMetadata = string.IsNullOrEmpty(expression)?
ViewData.ModelMetadata :
ExpressionMetadataProvider.FromStringExpression(
expression,
ViewData,
MetadataProvider);
var metadata = ExpressionMetadataProvider.FromStringExpression(expression, ViewData, MetadataProvider);
return GenerateLabel(
modelMetadata,
metadata,
expression,
labelText,
htmlAttributes);