You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
181 lines
10 KiB
181 lines
10 KiB
Imports System.Collections.Generic
|
|
Imports System.Linq
|
|
Imports System.Text
|
|
Imports System.Web.Mvc
|
|
Imports System.Web.Mvc.Html
|
|
Imports System.Web.WebPages
|
|
Imports System.IO
|
|
Imports System.Globalization
|
|
Imports System.Runtime.CompilerServices
|
|
|
|
Public Module PartialExtensions
|
|
|
|
'http://aspnet.codeplex.com/workitem/8872
|
|
'https://github.com/q42jaap/PartialMagic.Mvc/blob/master/PartialMagic.Mvc/PartialExtensions.cs
|
|
|
|
' copied from HtmlHelper.FindPartialView because it's original is internal
|
|
Public Function FindPartialView(viewContext As ViewContext,
|
|
partialViewName As String,
|
|
viewEngineCollection As ViewEngineCollection) As IView
|
|
|
|
Dim result As ViewEngineResult = viewEngineCollection.FindPartialView(viewContext, partialViewName)
|
|
|
|
If result.View IsNot Nothing Then
|
|
Return result.View
|
|
End If
|
|
|
|
Dim builder As New StringBuilder()
|
|
|
|
For Each str As String In result.SearchedLocations
|
|
builder.AppendLine()
|
|
builder.Append(str)
|
|
Next
|
|
|
|
Throw New InvalidOperationException(String.Format(CultureInfo.CurrentCulture, "The partial view '{0}' was not found or no view engine supports the searched locations. The following locations were searched:{1}", New Object() {partialViewName, builder}))
|
|
|
|
End Function
|
|
|
|
' copied from HtmlHelper.RenderPartialInternal (thanks Red Gate!)
|
|
' modified the logics to OrNull functionality
|
|
Public Sub RenderPartialInternalOrNull(htmlHelper As HtmlHelper,
|
|
partialViewName As String,
|
|
viewData As ViewDataDictionary,
|
|
model As Object,
|
|
writer As TextWriter,
|
|
viewEngineCollection As ViewEngineCollection)
|
|
|
|
If String.IsNullOrEmpty(partialViewName) Then
|
|
Throw New ArgumentNullException("partialViewName")
|
|
End If
|
|
Dim dictionary As New ViewDataDictionary(If(viewData, htmlHelper.ViewData))
|
|
|
|
' we explicitly set the model here so we don't get the current Model as fallback.
|
|
dictionary.Model = model
|
|
|
|
Dim viewContext As New ViewContext(htmlHelper.ViewContext, htmlHelper.ViewContext.View, dictionary, htmlHelper.ViewContext.TempData, writer)
|
|
FindPartialView(viewContext, partialViewName, viewEngineCollection).Render(viewContext, writer)
|
|
|
|
End Sub
|
|
|
|
''' <summary>
|
|
''' Renders the specified partial view as an HTML-encoded string (even if the model is null).
|
|
''' This is a safer method than the normal HtmlHelper.Partial() because that one will use the current Model as a fallback when the given model is null.
|
|
''' </summary>
|
|
''' <param name="htmlHelper">The HTML helper instance that this method extends.</param>
|
|
''' <param name="partialViewName">The name of the partial view to render.</param>
|
|
''' <param name="model">The model for the partial view, may be null</param>
|
|
''' <param name="viewData">A new dictionary or null (in which case the current view data is used as a fallback)</param>
|
|
''' <returns></returns>
|
|
<Extension> _
|
|
Public Function PartialOrNull(htmlHelper As HtmlHelper, partialViewName As String, model As Object, Optional viewData As ViewDataDictionary = Nothing) As MvcHtmlString
|
|
Using writer As New StringWriter(CultureInfo.CurrentCulture)
|
|
RenderPartialInternalOrNull(htmlHelper, partialViewName, viewData, model, writer, ViewEngines.Engines)
|
|
Return MvcHtmlString.Create(writer.ToString())
|
|
End Using
|
|
End Function
|
|
|
|
''' <summary>
|
|
''' Renders the specified partial view as an HTML-encoded string unless the model is null.
|
|
''' Note that the partial is not exectued when the model is null.
|
|
''' </summary>
|
|
''' <param name="htmlHelper">The HTML helper instance that this method extends.</param>
|
|
''' <param name="partialViewName">The name of the partial view to render.</param>
|
|
''' <param name="model">The model for the partial view, may be null</param>
|
|
''' <param name="viewData">A new dictionary or null (in which case the current view data is used as a fallback)</param>
|
|
''' <returns>The partial view that is rendered as an HTML-encoded string or null if the model is null.</returns>
|
|
<Extension()>
|
|
Public Function PartialOrDiscard(htmlHelper As HtmlHelper, partialViewName As String, model As Object, Optional viewData As ViewDataDictionary = Nothing) As MvcHtmlString
|
|
If model Is Nothing Then
|
|
Return Nothing
|
|
End If
|
|
Return htmlHelper.[Partial](partialViewName, model, viewData)
|
|
End Function
|
|
|
|
''' <summary>
|
|
''' Renders the specified partial view as an HTML-encoded string unless the model is null.
|
|
''' The given wrapper is used to wrap around the output of the partial result, it uses the Razor @item to place the partial output within the wrapper's template.
|
|
''' Note the partial and the wrapper are not exectued when the model is null.
|
|
''' </summary>
|
|
''' <remarks>
|
|
''' Note that the partial is rendered before wrapper is executed (should there be side-effects in either of them).
|
|
''' </remarks>
|
|
''' <param name="htmlHelper">The HTML helper instance that this method extends.</param>
|
|
''' <param name="partialViewName">The name of the partial view to render.</param>
|
|
''' <param name="model">The model for the partial view, may be null</param>
|
|
''' <param name="wrapper">This wrapper is excuted when the model is not null, use @item to render the output of the partial</param>
|
|
''' <param name="viewData">A new dictionary or null (in which case the current view data is used as a fallback)</param>
|
|
''' <returns>The partial view that is rendered as an HTML-encoded string or null if the model is null.</returns>
|
|
<Extension()>
|
|
Public Function PartialOrDiscard(htmlHelper As HtmlHelper,
|
|
partialViewName As String,
|
|
model As Object,
|
|
wrapper As Func(Of MvcHtmlString, HelperResult),
|
|
Optional viewData As ViewDataDictionary = Nothing) As HelperResult
|
|
|
|
If model Is Nothing Then
|
|
Return Nothing
|
|
End If
|
|
|
|
'krze: 'Function' geändert zu 'Sub' !?
|
|
Return New HelperResult(Sub(writer)
|
|
Dim partialResult = htmlHelper.[Partial](partialViewName, model, viewData)
|
|
wrapper(partialResult).WriteTo(writer)
|
|
End Sub)
|
|
End Function
|
|
|
|
''' <summary>
|
|
''' Renders the specified partial view as an HTML-encoded string unless the model is null or empty.
|
|
''' Note that the partial is not exectued when the model is null or empty.
|
|
''' </summary>
|
|
''' <remarks>
|
|
''' The enumerable passed into the model is checked with Any() to see whether it is empty.
|
|
''' In case of a LINQ query this may cause the enumerable to be called twice (once for the Any() check and once propably inside the partial).
|
|
''' </remarks>
|
|
''' <param name="htmlHelper">The HTML helper instance that this method extends.</param>
|
|
''' <param name="partialViewName">The name of the partial view to render.</param>
|
|
''' <param name="model">The model for the partial view, may be null or an empty enumerable</param>
|
|
''' <param name="viewData">A new dictionary or null (in which case the current view data is used as a fallback)</param>
|
|
''' <returns>The partial view that is rendered as an HTML-encoded string or null if the model is null or empty.</returns>
|
|
<Extension()>
|
|
Public Function PartialOrDiscardIfEmpty(htmlHelper As HtmlHelper, partialViewName As String, model As IEnumerable(Of Object), Optional viewData As ViewDataDictionary = Nothing) As MvcHtmlString
|
|
If model Is Nothing OrElse Not model.Any() Then
|
|
Return Nothing
|
|
End If
|
|
Return htmlHelper.[Partial](partialViewName, model, viewData)
|
|
End Function
|
|
|
|
''' <summary>
|
|
''' Renders the specified partial view as an HTML-encoded string unless the model is null or empty.<br/>
|
|
''' The given wrapper is used to wrap around the output of the partial result, it uses the Razor @item to place the partial output within the wrapper's template.
|
|
''' Note the partial and the wrapper are not exectued when the model is null or empty.
|
|
''' </summary>
|
|
''' <remarks>
|
|
''' The enumerable passed into the model is checked with Any() to see whether it is empty.
|
|
''' In case of a LINQ query this may cause the enumerable to be called twice (once for the Any() check and once propably inside the partial).
|
|
''' Note that the partial is rendered before wrapper is executed (should there be side-effects in either of them).
|
|
''' </remarks>
|
|
''' <param name="htmlHelper">The HTML helper instance that this method extends.</param>
|
|
''' <param name="partialViewName">The name of the partial view to render.</param>
|
|
''' <param name="model">The model for the partial view, may be null or an empty enumerable</param>
|
|
''' <param name="wrapper">This wrapper is excuted when the model is not null or empty, use @item to render the output of the partial</param>
|
|
''' <param name="viewData">A new dictionary or null (in which case the current view data is used as a fallback)</param>
|
|
''' <returns>The partial view that is rendered as an HTML-encoded string or null if the model is null or empty.</returns>
|
|
<Extension()>
|
|
Public Function PartialOrDiscardIfEmpty(htmlHelper As HtmlHelper,
|
|
partialViewName As String,
|
|
model As IEnumerable(Of Object),
|
|
wrapper As Func(Of MvcHtmlString, HelperResult),
|
|
Optional viewData As ViewDataDictionary = Nothing) As HelperResult
|
|
|
|
If model Is Nothing OrElse Not model.Any() Then
|
|
Return Nothing
|
|
End If
|
|
|
|
'krze: 'Function' geändert zu 'Sub' !?
|
|
Return New HelperResult(Sub(writer)
|
|
Dim partialResult = htmlHelper.[Partial](partialViewName, model, viewData)
|
|
wrapper(partialResult).WriteTo(writer)
|
|
End Sub)
|
|
End Function
|
|
|
|
End Module
|
|
|