public IHtmlString Render(IGridColumn column)
{
if (!column.FilterEnabled)
return MvcHtmlString.Create(string.Empty);
//determine current column filter settings
var filterSettings = new List<ColumnFilterValue>();
if (_settings.IsInitState && column.InitialFilterSettings != ColumnFilterValue.Null)
{
filterSettings.Add(column.InitialFilterSettings);
}
else
{
filterSettings.AddRange(_settings.FilteredColumns.GetByColumn(column));
}
bool isColumnFiltered = filterSettings.Any();
//determine current url:
var builder = new CustomQueryStringBuilder(_settings.Context.Request.QueryString);
var exceptQueryParameters = new List<string>
{
QueryStringFilterSettings.DefaultTypeQueryParameter,
QueryStringFilterSettings.DefaultFilterInitQueryParameter
};
string pagerParameterName = GetPagerQueryParameterName(column.ParentGrid.Pager);
if (!string.IsNullOrEmpty(pagerParameterName))
exceptQueryParameters.Add(pagerParameterName);
string url = builder.GetQueryStringExcept(exceptQueryParameters);
var gridFilterButton = new TagBuilder("span");
gridFilterButton.AddCssClass(FilterButtonCss);
if (isColumnFiltered)
gridFilterButton.AddCssClass(FilteredButtonCssClass);
gridFilterButton.Attributes.Add("title", Strings.FilterButtonTooltipText);
var gridFilter = new TagBuilder("div");
var dataKeyList = new Dictionary<string, string>
{
{"data-type", column.FilterWidgetTypeName},
{"data-name", column.Name},
{"data-widgetdata", JsonHelper.JsonSerializer(column.FilterWidgetData)},
{"data-filterdata", JsonHelper.JsonSerializer(filterSettings)},
{"data-url", url}
};
gridFilter.InnerHtml = gridFilterButton.ToString();
gridFilter.AddCssClass("grid-filter");
foreach (var data in dataKeyList)
{
if (!string.IsNullOrWhiteSpace(data.Value))
gridFilter.Attributes.Add(data.Key, data.Value);
}
return MvcHtmlString.Create(gridFilter.ToString());
}
public void TestWithParameter()
{
var queryStringParameters = new NameValueCollection();
queryStringParameters.Add("key1", "value1");
queryStringParameters.Add("key2", "value2");
queryStringParameters.Add("key3", "value3");
_builder = new CustomQueryStringBuilder(queryStringParameters);
var str1 = _builder.GetQueryStringWithParameter("key4", "value4");
Assert.AreEqual(str1, "?key1=value1&key2=value2&key3=value3&key4=value4");
str1 = _builder.GetQueryStringWithParameter("key4", "value4new");
Assert.AreEqual(str1, "?key1=value1&key2=value2&key3=value3&key4=value4new");
}
public void TestExcept()
{
var queryStringParameters = new NameValueCollection();
queryStringParameters.Add("key1", "value1");
queryStringParameters.Add("key2", "value2");
_builder = new CustomQueryStringBuilder(queryStringParameters);
var str1 = _builder.GetQueryStringExcept(new[] { "key1" });
Assert.AreEqual(str1, "?key2=value2");
str1 = _builder.GetQueryStringExcept(new[] { "key2" });
Assert.AreEqual(str1, "?key1=value1");
str1 = _builder.GetQueryStringExcept(new[] { "key1", "key2" });
Assert.AreEqual(str1, string.Empty);
}
private string GetSortUrl(string columnName, GridSortDirection? direction)
{
//switch direction for link:
GridSortDirection newDir = direction == GridSortDirection.Ascending
? GridSortDirection.Descending
: GridSortDirection.Ascending;
//determine current url:
var builder = new CustomQueryStringBuilder(_settings.Context.Request.QueryString);
string url =
builder.GetQueryStringExcept(new[]
{
GridPager.DefaultPageQueryParameter,
_settings.ColumnQueryParameterName,
_settings.DirectionQueryParameterName
});
if (string.IsNullOrEmpty(url))
url = "?";
else
url += "&";
return string.Format("{0}{1}={2}&{3}={4}", url, _settings.ColumnQueryParameterName, columnName,
_settings.DirectionQueryParameterName,
((int) newDir).ToString(CultureInfo.InvariantCulture));
}