void HandleSort(string sortExpression, SortDirection sortDirection)
{
DataGridViewSortEventArgs e = new DataGridViewSortEventArgs(sortExpression, sortDirection);
this.OnSorting(e);
if (!e.Cancel)
{
string strHeaderText = string.Empty;
foreach (DataControlFieldEx field in this.Columns)
{
strHeaderText = field.HeaderText;
if (!string.IsNullOrEmpty(strHeaderText))
{
//清除所有的排序方向标志↑↓
strHeaderText = strHeaderText.Replace("↑", "").Replace("↓", "");
//给当前排序列加方向标志
if (e.SortExpression == field.SortExpression)
{
strHeaderText += (e.SortDirection == SortDirection.Ascending) ? "↑" : "↓";
}
//重新设置排序方向标志
field.HeaderText = strHeaderText;
}
}
this.SortExpression = e.SortExpression;
this.SortDirection = e.SortDirection;
this.PageIndex = 0;
this.OnSorted(EventArgs.Empty);
this.RequiresDataBinding = true;
}
}
/// <summary>
/// 触发<see cref="Sorting"/>事件。
/// </summary>
/// <param name="e"></param>
protected virtual void OnSorting(DataGridViewSortEventArgs e)
{
DataGridViewSortEventHandler handler = this.Sorting;
if (handler != null)
{
handler(this, e);
}
}
