如何在GridView中显示基于排序类型的图像
本文关键字:排序 类型 图像 于排序 GridView 显示 | 更新日期: 2023-09-27 18:16:30
我有一个GridView
,我正在按ASC/DESC排序,我想显示一个箭头的图像。
我有以下内容:
<asp:GridView AlternatingRowStyle-BackColor="#E2E2E2" AutoGenerateColumns="false" OnSorting="yourTasksGV_Sorting" AllowSorting="true" ID="yourTasksGV" runat="server" ClientIDMode="Static" EmptyDataText="There is no data to display">
<SortedAscendingHeaderStyle CssClass="gvAsc" />
<SortedDescendingHeaderStyle CssClass="gvDesc" />
<Columns>
<asp:HyperLinkField Target="_blank" DataNavigateUrlFields="Task Detail" DataTextField="Task Name" DataNavigateUrlFormatString="" HeaderText="Task Details" SortExpression="Task Detail" ItemStyle-Width="35%" ItemStyle-CssClass="taskTableColumn" />
<asp:BoundField DataField="Services" HeaderText="Services" SortExpression="Services" ItemStyle-Width="25%" ItemStyle-CssClass="taskTableColumn" />
<asp:BoundField DataField="Status" HeaderText="Status" SortExpression="Status" ItemStyle-Width="15%" ItemStyle-CssClass="taskTableColumn" />
<asp:BoundField DataField="Due Date" HeaderText="Due Date" SortExpression="Due Date" ItemStyle-Width="15%" ItemStyle-CssClass="taskTableColumn" />
</Columns>
</asp:GridView>
CSS: #yourTasksGV th.gvAsc a { background:url(../theImages/up.png) right center no-repeat; }
#yourTasksGV th.gvDesc a { background:url(../theImages/down.png) right center no-repeat; }
排序正在进行,只是箭头没有根据排序显示。
如何解决这个问题?
下面是我使用的,我喜欢它,因为它只为一个数据绑定事件触发一次,而不是每行触发一次。
protected void GridView1_DataBound(object sender, EventArgs e)
{
if (String.Empty != this.GridView1.SortExpression)
AddSortImage(GridView1.HeaderRow);
}
支持的方法有:
void AddSortImage(GridViewRow headerRow)
{
int iCol = GetSortColumnIndex();
if (-1 == iCol)
return;
// Create the sorting image based on the sort direction.
Image sortImage = new Image();
if (SortDirection.Ascending == this.GridView1.SortDirection)
{ sortImage.ImageUrl = @"~'Images'BlackDownArrow.gif";
sortImage.AlternateText = "Ascending Order";
} else
{
sortImage.ImageUrl = @"~'Images'BlackUpArrow.gif";
sortImage.AlternateText = "Descending Order";
}
// Add the image to the appropriate header cell.
headerRow.Cells[iCol].Controls.Add(new LiteralControl(" "));
headerRow.Cells[iCol].Controls.Add(sortImage);
}
public int GetSortColumnIndex()
{
// Iterate through the Columns collection to determine the index
// of the column being sorted.
foreach (DataControlField field in GridView1.Columns)
{
if (field.SortExpression == this.GridView1.SortExpression)
{
return this.GridView1.Columns.IndexOf(field);
}
}
return -1;
}