0
我有一個Gridview
名爲SearchGenericReport
。我想要在Gridview Columns的標題中對圖像進行上下排序。但GetSortColumnIndex(string strrCol)
總是返回- value
。所以我不能添加圖像。我在這裏錯過了什麼?在gridview標題中排序圖像
public int GetSortColumnIndex(String strCol)
{
DataTable result= Session["TaskTable"] as DataTable;
foreach (DataControlField field in result.Columns)
{
if (field.SortExpression == strCol)
{
return SearchGenericReport.Columns.IndexOf(field);
}
}
return -1;
}
void AddSortImage(GridViewRow headerRow)
{
int selCol = GetSortColumnIndex(m_strSortExp);
//if (-1 == selCol)
//{
// return;
//}
// Create the sorting image based on the sort direction
Image sortImage = new Image();
if (SortDirection.Ascending == m_SortDirection)
{
sortImage.ImageUrl = "img/uparrow.png";
sortImage.AlternateText = "Ascending";
}
else
{
sortImage.ImageUrl = "img/downarrow.png";
sortImage.AlternateText = "Descending";
}
// Add the image to the appropriate header cell
headerRow.Cells[selCol].Controls.Add(sortImage);
}
但是,當我快速監視在gridview.Columns - 它在 「enumertaion沒有結果」 的結果和一些東西。 及其多年平均值進入For Each循環僅..我已經修改這樣的代碼 - INT GetSortColumnIndex(){
// Iterate through the Columns collection to determine the index
// of the column being sorted.
foreach (DataControlField field in this.SearchGenericReport.Columns)
{
if (field.SortExpression == SearchGenericReport.SortExpression)
{
return SearchGenericReport.Columns.IndexOf(field);
}
}
return -1;
}
void AddSortImage(int columnIndex,GridViewRow headerRow)
{
// Create the sorting image based on the sort direction
Image sortImage = new Image();
SortDirection direction = SearchGenericReport.SortDirection;
if (direction == SortDirection.Ascending)
{
sortImage.ImageUrl = "img/uparrow.png";
sortImage.AlternateText = "Ascending";
}
else
{
sortImage.ImageUrl = "img/downarrow.png";
sortImage.AlternateText = "Descending";
}
// Add the image to the appropriate header cell
headerRow.Cells[columnIndex].Controls.Add(sortImage);
}