public void WritesExpectedCollectionIndexHiddenInput_WhenThereIsAnIndexInRequestData()
{
const string collectionName = "CollectionName";
var index0 = Guid.NewGuid();
var index1 = Guid.NewGuid();
var indexes = string.Format("{0},{1}", index0, index1);
var httpContext = new Mock<HttpContextBase>();
var httpContextItems = new Dictionary<string, object>();
httpContext.Setup(p => p.Items).Returns(httpContextItems);
var httpRequest = new Mock<HttpRequestBase>();
httpRequest.Setup(i => i[It.Is<string>(s => s == string.Format("{0}.index", collectionName))])
.Returns(indexes);
httpContext.Setup(p => p.Request).Returns(httpRequest.Object);
var viewContext = new ViewContext();
var writer = new StringWriter();
viewContext.Writer = writer;
var html = new HtmlHelper(viewContext, new FakeViewDataContainer());
viewContext.HttpContext = httpContext.Object;
using (var result = html.BeginCollectionItem(collectionName))
{
Assert.That(result, Is.Not.Null);
}
var text = writer.ToString();
Assert.That(text,
Is.Not.Null
.And.Not.Empty
.And.StringStarting(string.Format(@"<input type=""hidden"" name=""{0}.index"" autocomplete=""off"" value=""{1}"" />", collectionName, index0)));
}
public void WritesCollectionIndexHiddenInput_WhenThereIsNothingInRequestData()
{
const string collectionName = "CollectionName";
var httpContext = new Mock<HttpContextBase>();
var httpContextItems = new Dictionary<string, object>();
httpContext.Setup(p => p.Items).Returns(httpContextItems);
var httpRequest = new Mock<HttpRequestBase>();
httpContext.Setup(p => p.Request).Returns(httpRequest.Object);
var viewContext = new ViewContext();
var writer = new StringWriter();
viewContext.Writer = writer;
var html = new HtmlHelper(viewContext, new FakeViewDataContainer());
viewContext.HttpContext = httpContext.Object;
using (var result = html.BeginCollectionItem(collectionName))
{
Assert.That(result, Is.Not.Null);
}
var text = writer.ToString();
Assert.That(text,
Is.Not.Null
.And.Not.Empty
.And.StartsWith(string.Format(@"<input type=""hidden"" name=""{0}.index"" autocomplete=""off"" value=""", collectionName))
.And.Contains(@""" />"));
}
public void WritesCollectionIndexHiddenInput_WhenThereIsNothingInRequestData()
{
const string collectionName = "CollectionName";
var httpContext = new Mock <HttpContextBase>();
var httpContextItems = new Dictionary <string, object>();
httpContext.Setup(p => p.Items).Returns(httpContextItems);
var httpRequest = new Mock <HttpRequestBase>();
httpContext.Setup(p => p.Request).Returns(httpRequest.Object);
var viewContext = new ViewContext();
var writer = new StringWriter();
viewContext.Writer = writer;
var html = new HtmlHelper(viewContext, new FakeViewDataContainer());
viewContext.HttpContext = httpContext.Object;
using (var result = html.BeginCollectionItem(collectionName))
{
result.ShouldNotBeNull();
}
var text = writer.ToString();
text.ShouldNotBeNull();
text.ShouldNotBeEmpty();
text.ShouldStartWith(string.Format(
@"<input type=""hidden"" name=""{0}.index"" autocomplete=""off"" value=""",
collectionName));
text.ShouldContain(@""" />");
}
public static async Task RenderPartialCollectionAsync <TModel, TProperty>(this HtmlHelper <TModel> htmlHelper, Expression <Func <TModel, TProperty> > expression, string partialViewName)
where TProperty : IEnumerable
{
var metadata = ExpressionMetadataProvider.FromLambdaExpression(expression, htmlHelper.ViewData, htmlHelper.MetadataProvider);
var items = (IEnumerable)metadata.Model ?? Enumerable.Empty <TModel>();
foreach (var item in items)
{
using (htmlHelper.BeginCollectionItem(metadata.Metadata.PropertyName))
{
await htmlHelper.RenderPartialAsync(partialViewName, item);
}
}
}
public void WritesExpectedCollectionIndexHiddenInput_WhenThereIsAnIndexInRequestData()
{
const string collectionName = "CollectionName";
var index0 = Guid.NewGuid();
var index1 = Guid.NewGuid();
var indexes = string.Format("{0},{1}", index0, index1);
var httpContext = new Mock <HttpContextBase>();
var httpContextItems = new Dictionary <string, object>();
httpContext.Setup(p => p.Items).Returns(httpContextItems);
var httpRequest = new Mock <HttpRequestBase>();
httpRequest.Setup(i => i[It.Is <string>(s => s == string.Format("{0}.index", collectionName))])
.Returns(indexes);
httpContext.Setup(p => p.Request).Returns(httpRequest.Object);
var viewContext = new ViewContext();
var writer = new StringWriter();
viewContext.Writer = writer;
var html = new HtmlHelper(viewContext, new FakeViewDataContainer());
viewContext.HttpContext = httpContext.Object;
using (var result = html.BeginCollectionItem(collectionName))
{
result.ShouldNotBeNull();
}
var text = writer.ToString();
text.ShouldNotBeNull();
text.ShouldNotBeEmpty();
text.ShouldStartWith(string.Format(
@"<input type=""hidden"" name=""{0}.index"" autocomplete=""off"" value=""{1}"" />",
collectionName, index0));
}
/// <summary>
/// Generate index and add it to input elements.
/// </summary>
/// <param name="helper">HtmlHelper.</param>
/// <param name="collectionName">Name of collection, must be same at posted action method.</param>
/// <returns>IDisposable.</returns>
public static IDisposable BeginCollectionItem <TModel>(
this HtmlHelper <TModel> helper,
string collectionName)
{
return(helper.BeginCollectionItem(collectionName, true));
}
