private static string RenderViewToString(ControllerContext context,
string viewName, object viewData)
{
//Create memory writer
var sb = new StringBuilder();
var memWriter = new StringWriter(sb);
//Create fake http context to render the view
var fakeResponse = new HttpResponse(memWriter);
var fakeContext = new HttpContext(HttpContext.Current.Request, fakeResponse);
var fakeControllerContext = new ControllerContext(
new HttpContextWrapper(fakeContext),
context.RouteData, context.Controller);
var oldContext = HttpContext.Current;
HttpContext.Current = fakeContext;
//Use HtmlHelper to render partial view to fake context
var html = new HtmlHelper(new ViewContext(fakeControllerContext,
new FakeView(), new ViewDataDictionary(), new TempDataDictionary(), memWriter),
new ViewPage());
RenderPartialExtensions.RenderPartial(html, viewName, viewData);
//Restore context
HttpContext.Current = oldContext;
//Flush memory and return output
memWriter.Flush();
return(sb.ToString());
}
/// <summary>
/// Renders partial view using an expression as prefix
/// </summary>
public static void RenderPartialFor <TModel, TProperty>(this HtmlHelper <TModel> helper, string partialViewName, Expression <Func <TModel, TProperty> > expression, object parameters = null)
{
if (helper == null)
{
throw new ArgumentNullException("helper");
}
var expressionText = ExpressionHelper.GetExpressionText(expression);
var model = helper.ViewData.GetViewDataInfo(expressionText);
var originalPrefix = helper.ViewData.TemplateInfo.HtmlFieldPrefix;
try
{
var viewData = new ViewDataDictionary(helper.ViewData);
viewData.TemplateInfo.HtmlFieldPrefix = (string.IsNullOrEmpty(originalPrefix) ? "" : originalPrefix + ".") + expressionText;
if (parameters != null)
{
foreach (var pair in new RouteValueDictionary(parameters))
{
viewData[pair.Key] = pair.Value;
}
}
RenderPartialExtensions.RenderPartial(helper, partialViewName, model.Value, viewData);
}
finally
{
helper.ViewData.TemplateInfo.HtmlFieldPrefix = originalPrefix;
}
}
public static void RenderPartial(this HtmlHelper htmlHelper, string partialViewName, object model = null, ViewDataDictionary viewData = null)
{
RenderPartialExtensions.RenderPartial(
htmlHelper,
partialViewName,
model,
viewData ?? htmlHelper.ViewData);
}
public static Task RenderPartialAsync(this HtmlHelper htmlHelper, string partialViewName, object model = null, ViewDataDictionary viewData = null)
{
return(RenderPartialExtensions.RenderPartialAsync(
htmlHelper,
partialViewName,
model,
viewData ?? htmlHelper.ViewData));
}
/// <summary>
/// Renders partial view passing parameters into ViewData
/// </summary>
public static void RenderPartial(this HtmlHelper helper, string partialViewName, object model, object parameters)
{
var viewData = new ViewDataDictionary(helper.ViewData);
if (parameters != null)
{
foreach (var pair in new RouteValueDictionary(parameters))
{
viewData[pair.Key] = pair.Value;
}
}
RenderPartialExtensions.RenderPartial(helper, partialViewName, model, viewData);
}
public void RenderPartial(string partialViewName)
{
RenderPartialExtensions.RenderPartial(this, partialViewName);
}