public void RenderPager(DataTablesGridModel <T> model,
IEnumerable <T> dataSource, int?filteredRowCount, int totalRowCount,
TextWriter output)
{
output.Write("<div class='dataTables_info'>");
if ((filteredRowCount ?? totalRowCount) < 1)
{
output.Write("No entries");
}
else
{
output.Write("Showing {0} to {1} of {2} entries",
Math.Min(model.PageIndex * model.RowsPerPage + 1, (filteredRowCount ?? totalRowCount)),
Math.Min((model.PageIndex + 1) * model.RowsPerPage, (filteredRowCount ?? totalRowCount)),
filteredRowCount ?? totalRowCount);
}
if (filteredRowCount.HasValue)
{
output.Write(" (filtered from {0} total entries)", totalRowCount);
}
output.Write("</div>");
output.Write("<div class='dataTables_paginate paging_two_button'>");
if (model.PageIndex < 1)
{
output.Write("<div class='paginate_disabled_previous' title='Previous'></div>");
}
else
{
output.Write("<a href='{0}' class='paginate_enabled_previous' title='Previous'></a>", HttpUtility.HtmlEncode(model.GetPageUrl(model.PageIndex - 1)));
}
if ((model.PageIndex + 1) * model.RowsPerPage >= (filteredRowCount ?? totalRowCount))
{
output.Write("<div class='paginate_disabled_next' title='Next' title='Next'></div>");
}
else
{
output.Write("<a href='{0}' class='paginate_enabled_next' title='Next'></a>", HttpUtility.HtmlEncode(model.GetPageUrl(model.PageIndex + 1)));
}
output.Write("</div>");
}
public bool IsSorted(DataTablesGridModel <T> model)
{
return(ColumnName.Equals(model.SortColumnName, StringComparison.OrdinalIgnoreCase));
}
public void Render(DataTablesGridModel <T> model,
IEnumerable <T> dataSource, int?filteredRowCount, int totalRowCount,
TextWriter output)
{
if (model.CanAnyColumnFilter)
{
output.Write("<form method='get' action='{0}' class='form'>", HttpUtility.HtmlEncode(model.GetFilterUrl()));
if (model.IsSortParameterSpecified)
{
output.Write("<input type='hidden' name='{0}' value='{1}'/>", HttpUtility.HtmlEncode(model.SortParameterName), HttpUtility.HtmlEncode(model.SortColumnName));
}
if (model.IsSortAscendingParameterSpecified)
{
output.Write("<input type='hidden' name='{0}' value='{1}'/>", HttpUtility.HtmlEncode(model.SortAscendingParameterName), model.SortAscending);
}
if (!string.IsNullOrWhiteSpace(model.ParameterNamePrefix))
{
output.Write("<input type='hidden' name='parameterNamePrefix' value='{0}'/>", HttpUtility.HtmlEncode(model.ParameterNamePrefix));
}
}
output.Write("<table cellspacing='0' cellpadding='0' border='0' class='display'>");
output.Write("<thead><tr>");
foreach (var column in model.Columns)
{
if (column.CanSort)
{
string @class = column.IsSorted(model) ? model.SortAscending ? "sorting_asc" : "sorting_desc" : string.Empty;
output.Write("<th class='sortable {0}'>", @class);
output.Write("<a href='{0}'><span>{1}</span></a>", HttpUtility.HtmlEncode(model.GetSortUrl(column.ColumnName, column.DefaultSortAscending)), HttpUtility.HtmlEncode(column.Header));
}
else
{
output.Write("<th>");
output.Write(HttpUtility.HtmlEncode(column.Header));
}
output.Write("</th>");
}
if (model.CanAnyColumnFilter)
{
output.Write("</tr><tr class='filters'>");
foreach (var column in model.Columns)
{
output.Write("<th class='field'>");
if (column.CanFilter)
{
output.Write("<input type='text' name='{0}' value='{1}'",
model.GetFilterParameterName(column.ColumnName),
model.FiltersByColumnName.ContainsKey(column.ColumnName) ?
HttpUtility.HtmlEncode(model.FiltersByColumnName[column.ColumnName]) : string.Empty
);
if (column.FilterTitle != null)
{
output.Write(" title='{0}'", HttpUtility.HtmlEncode(column.FilterTitle));
output.Write(" placeholder='{0}'", HttpUtility.HtmlEncode(column.FilterTitle));
}
output.Write("/>");
}
output.Write("</th>");
}
}
output.Write("</tr></thead>");
output.Write("<tbody>");
bool isEven = false;
foreach (T row in dataSource)
{
string @class = isEven ? "even" : "odd";
output.Write("<tr class='{0}'>", @class);
foreach (var column in model.Columns)
{
output.Write("<td>");
output.Write(column.Evaluate(row));
output.Write("</td>");
}
output.Write("</tr>");
isEven = !isEven;
}
output.Write("</tbody>");
output.Write("</table>");
if (model.CanAnyColumnFilter)
{
// workaround to allow form submission using enter key
output.Write("<input type='submit' style='position: absolute; left: -9999px;' />");
output.Write("</form>");
}
}
public static IHtmlString DataTablesGrid <T>(this HtmlHelper helper,
Action <DataTablesColumnBuilder <T> > columns = null,
int?pageIndex = null,
string parameterNamePrefix = null,
int?rowsPerPage = null,
bool?sortAscending = null,
string sortColumnName = null,
IEnumerable <T> dataSource = null,
int?totalRowCount = null,
int?filteredRowCount = null,
bool canPage = true)
where T : class
{
var model = new DataTablesGridModel <T>(helper.ViewContext);
if (columns == null)
{
throw new ArgumentException("Expected non null value for columns.");
}
var columnBuilder = new DataTablesColumnBuilder <T>();
columns(columnBuilder);
model.Columns = columnBuilder.Columns;
if (pageIndex.HasValue)
{
model.PageIndex = pageIndex.Value;
}
if (parameterNamePrefix != null)
{
model.ParameterNamePrefix = parameterNamePrefix;
}
if (rowsPerPage.HasValue)
{
model.RowsPerPage = rowsPerPage.Value;
}
if (!canPage)
{
model.RowsPerPage = int.MaxValue;
}
if (sortAscending.HasValue)
{
model.SortAscending = sortAscending.Value;
}
if (sortColumnName != null)
{
model.SortColumnName = sortColumnName;
}
if (dataSource == null)
{
throw new ArgumentException("Expected non null value for dataSource.");
}
int calculatedTotalRowCount = totalRowCount.HasValue ? totalRowCount.Value : dataSource.Count();
using (TextWriter output = new StringWriter())
{
output.Write("<div class='dataTablesGrid'>");
var render = new DataTablesGridRenderer <T>();
render.Render(model, dataSource, filteredRowCount, calculatedTotalRowCount, output);
if (canPage)
{
render.RenderPager(model, dataSource, filteredRowCount, calculatedTotalRowCount, output);
}
output.Write("</div>");
return(new HtmlString(output.ToString()));
}
}
