private void SetSortHeaderAttributes(ASP.GridViewRowEventArgs e)
{
bool images = (this.AscImage != String.Empty && this.DescImage != String.Empty);
for (int i = 0; i < e.Row.Cells.Count; i++)
{
ASP.TableCell td = e.Row.Cells[i];
if (td.HasControls())
{
ASP.LinkButton button = td.Controls[0] as ASP.LinkButton;
if (button != null)
{
if (this.SortExpression == button.CommandArgument)
{
td.ApplyStyle(this.SortedColumnHeaderRowStyle);
this.sortColumnIndex = i;
if (images)
{
ImageButton btn = new ImageButton();
btn.CommandName = button.CommandName;
btn.CommandArgument = button.CommandArgument;
btn.ImageUrl = (this.SortDirection == ASP.SortDirection.Ascending ? this.AscImage : this.DescImage);
td.Controls.Add(new LiteralControl(" "));
td.Controls.Add(btn);
td.Controls.Add(new LiteralControl(" "));
}
}
}
}
}
}
private static void RenderInnerControlContent(TableCell tableCell, ExportCell cell)
{
if (!tableCell.HasControls())
{
return;
}
using (var writer = new StringWriter())
using (var html = new HtmlTextWriter(writer))
{
tableCell.Controls.OfType<Control>()
.Where(c => c.Visible)
.Where(c => !(c is HiddenField))
.ForEach(c => SetContent(c, cell, html));
cell.Markup += writer.ToString();
}
cell.Text += HtmlTagRegex.Replace(cell.Markup, String.Empty);
}
public static void SetGridViewSortImages(object sender, GridViewRowEventArgs e, string sortExpression, string sortDirection, ImageClickEventHandler ascClickEventHandler, ImageClickEventHandler descClickEventHandler, string ascImageFilePath, string descImageFilePage, string headerTextCssClass)
{
if (e.Row != null && e.Row.RowType == DataControlRowType.Header)
{
int i = 0;
foreach (TableCell tc in e.Row.Cells)
{
if (tc.HasControls() || (tc.Text != string.Empty && tc.Text.Trim() != " "))
{
Table table = new Table(), imageTable = new Table();
table.CellPadding = 0;
table.CellSpacing = 0;
table.Style.Add(HtmlTextWriterStyle.VerticalAlign, "middle");
table.Attributes.Add("summary", "Header cell structual table");
imageTable.CellSpacing = 0;
imageTable.CellPadding = 0;
imageTable.Attributes.Add("summary", "Sort images structual table");
table.BorderStyle = BorderStyle.None;
imageTable.BorderStyle = BorderStyle.None;
TableRow row = null, AscImageRow, DescImageRow;
TableCell AscImageCell, DescImageCell, headerTextCell, imagesCell;
AscImageRow = new TableRow();
AscImageRow.BackColor = Color.Transparent;
AscImageCell = new TableCell();
AscImageCell.BorderWidth = new Unit(0);
AscImageCell.Style.Add(HtmlTextWriterStyle.Padding, "0");
AscImageCell.Style.Add(HtmlTextWriterStyle.Margin, "0");
AscImageRow.Cells.Add(AscImageCell);
DescImageRow = new TableRow();
DescImageRow.BackColor = Color.Transparent;
DescImageCell = new TableCell();
DescImageCell.BorderWidth = new Unit(0);
DescImageCell.Style.Add(HtmlTextWriterStyle.Padding, "0");
DescImageCell.Style.Add(HtmlTextWriterStyle.Margin, "0");
DescImageRow.Cells.Add(DescImageCell);
imagesCell = new TableCell();
imagesCell.Width = new Unit(1);
imagesCell.BorderWidth = new Unit(0);
imagesCell.Style.Add(HtmlTextWriterStyle.Padding, "0");
imagesCell.Style.Add(HtmlTextWriterStyle.Margin, "0");
imagesCell.Controls.Add(imageTable);
row = new TableRow();
row.BackColor = Color.Transparent;
headerTextCell = new TableCell();
headerTextCell.BorderWidth = new Unit(0);
headerTextCell.Style.Add(HtmlTextWriterStyle.Padding, "0");
headerTextCell.Style.Add(HtmlTextWriterStyle.Margin, "0");
headerTextCell.HorizontalAlign = HorizontalAlign.Left;
Label HeaderLabel = new Label();
HeaderLabel.CssClass = headerTextCssClass;
headerTextCell.Controls.Add(HeaderLabel);
if (tc.HasControls())
{
// search for the header link
LinkButton lnk = tc.Controls[0] as LinkButton;
if (lnk != null)
{
ImageButton imgBtnUp = new ImageButton();
ImageButton imgBtnDown = new ImageButton();
imgBtnUp.ID = "imgAsc" + i.ToString();
imgBtnDown.ID = "imgDesc" + i.ToString();
i++;
imgBtnUp.Click += new ImageClickEventHandler(ascClickEventHandler);
imgBtnDown.Click += new ImageClickEventHandler(descClickEventHandler);
imgBtnUp.CommandName = lnk.CommandName;
imgBtnDown.CommandName = lnk.CommandName;
imgBtnUp.CommandArgument = lnk.CommandArgument;
imgBtnDown.CommandArgument = lnk.CommandArgument;
//--set the properties
HeaderLabel.Text = lnk.Text.Trim();
imgBtnUp.ImageUrl = ascImageFilePath;
imgBtnUp.AlternateText = "ascending";
imgBtnDown.ImageUrl = descImageFilePage;
imgBtnDown.AlternateText = "descending";
//// checking if the header link is the user's choice
if (sortExpression != lnk.CommandArgument || sortDirection == "DESC")
{
AscImageCell.Controls.Add(imgBtnUp);
imageTable.Rows.Add(AscImageRow);
}
if (sortExpression != lnk.CommandArgument || sortDirection == "ASC")
{
DescImageCell.Controls.Add(imgBtnDown);
imageTable.Rows.Add(DescImageRow);
}
//--this will remove the clickable column header link button that is automatically created
//--when adding sorting capabilities to a gridview
tc.Controls.RemoveAt(0);
if (!AscImageCell.HasControls())
{
AscImageCell.Dispose();
AscImageRow.Dispose();
}
if (!DescImageCell.HasControls())
{
DescImageCell.Dispose();
DescImageRow.Dispose();
}
row.Cells.Add(imagesCell);
row.Cells.Add(headerTextCell);
table.Rows.Add(row);
tc.Style.Add(HtmlTextWriterStyle.VerticalAlign, "middle");
tc.Controls.Add(table);
}
}
else
{
imagesCell.Dispose();
HeaderLabel.Text = tc.Text;
headerTextCell.VerticalAlign = VerticalAlign.Middle;
row.Cells.Add(headerTextCell);
table.Rows.Add(row);
tc.Style.Add(HtmlTextWriterStyle.VerticalAlign, "middle");
tc.Controls.Add(table);
}
}
}
}
}
