/// <summary>
/// 跨页保持选中项 - 根据隐藏字段的数据更新表格当前页面的选中行
/// </summary>
/// <param name="hfSelectedIDS"></param>
/// <param name="grid"></param>
public void UpdateSelectedRowIndexArray(FineUIPro.HiddenField hfSelectedIDS, Grid grid)
{
List <int> ids = GetSelectedIDsFromHiddenField(hfSelectedIDS);
List <int> nextSelectedRowIndexArray = new List <int>();
if (grid.IsDatabasePaging)
{
for (int i = 0, count = Math.Min(grid.PageSize, (grid.RecordCount - grid.PageIndex * grid.PageSize)); i < count; i++)
{
int id = Convert.ToInt32(grid.DataKeys[i][0]);
if (ids.Contains(id))
{
nextSelectedRowIndexArray.Add(i);
}
}
}
else
{
int nextStartPageIndex = grid.PageIndex * grid.PageSize;
for (int i = nextStartPageIndex, count = Math.Min(nextStartPageIndex + grid.PageSize, grid.RecordCount); i < count; i++)
{
int id = Convert.ToInt32(grid.DataKeys[i][0]);
if (ids.Contains(id))
{
nextSelectedRowIndexArray.Add(i - nextStartPageIndex);
}
}
}
grid.SelectedRowIndexArray = nextSelectedRowIndexArray.ToArray();
}
/// <summary>
/// 跨页保持选中项 - 将表格当前页面选中行对应的数据同步到隐藏字段中
/// </summary>
/// <param name="hfSelectedIDS"></param>
/// <param name="grid"></param>
public void SyncSelectedRowIndexArrayToHiddenField(FineUIPro.HiddenField hfSelectedIDS, Grid grid)
{
List <int> ids = GetSelectedIDsFromHiddenField(hfSelectedIDS);
List <int> selectedRows = new List <int>();
if (grid.SelectedRowIndexArray != null && grid.SelectedRowIndexArray.Length > 0)
{
selectedRows = new List <int>(grid.SelectedRowIndexArray);
}
if (grid.IsDatabasePaging)
{
for (int i = 0, count = Math.Min(grid.PageSize, (grid.RecordCount - grid.PageIndex * grid.PageSize)); i < count; i++)
{
int id = Convert.ToInt32(grid.DataKeys[i][0]);
if (selectedRows.Contains(i))
{
if (!ids.Contains(id))
{
ids.Add(id);
}
}
else
{
if (ids.Contains(id))
{
ids.Remove(id);
}
}
}
}
else
{
int startPageIndex = grid.PageIndex * grid.PageSize;
for (int i = startPageIndex, count = Math.Min(startPageIndex + grid.PageSize, grid.RecordCount); i < count; i++)
{
int id = Convert.ToInt32(grid.DataKeys[i][0]);
if (selectedRows.Contains(i - startPageIndex))
{
if (!ids.Contains(id))
{
ids.Add(id);
}
}
else
{
if (ids.Contains(id))
{
ids.Remove(id);
}
}
}
}
hfSelectedIDS.Text = new JArray(ids).ToString(Formatting.None);
}
/// <summary>
/// 从隐藏字段中获取选择的全部ID列表
/// </summary>
/// <param name="hfSelectedIDS"></param>
/// <returns></returns>
public List <int> GetSelectedIDsFromHiddenField(FineUIPro.HiddenField hfSelectedIDS)
{
JArray idsArray = new JArray();
string currentIDS = hfSelectedIDS.Text.Trim();
if (!String.IsNullOrEmpty(currentIDS))
{
idsArray = JArray.Parse(currentIDS);
}
else
{
idsArray = new JArray();
}
return(new List <int>(idsArray.ToObject <int[]>()));
}