public DataGridViewColumn GetLastColumn(DataGridViewElementStates includeFilter, DataGridViewElementStates excludeFilter)
{
if ((includeFilter & ~(DataGridViewElementStates.Visible | DataGridViewElementStates.Selected | DataGridViewElementStates.Resizable | DataGridViewElementStates.ReadOnly | DataGridViewElementStates.Frozen | DataGridViewElementStates.Displayed)) != DataGridViewElementStates.None)
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("DataGridView_InvalidDataGridViewElementStateCombination", new object[] { "includeFilter" }));
}
if ((excludeFilter & ~(DataGridViewElementStates.Visible | DataGridViewElementStates.Selected | DataGridViewElementStates.Resizable | DataGridViewElementStates.ReadOnly | DataGridViewElementStates.Frozen | DataGridViewElementStates.Displayed)) != DataGridViewElementStates.None)
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("DataGridView_InvalidDataGridViewElementStateCombination", new object[] { "excludeFilter" }));
}
if (this.itemsSorted == null)
{
this.UpdateColumnOrderCache();
}
for (int i = this.itemsSorted.Count - 1; i >= 0; i--)
{
DataGridViewColumn column = (DataGridViewColumn)this.itemsSorted[i];
if (column.StateIncludes(includeFilter) && column.StateExcludes(excludeFilter))
{
this.lastAccessedSortedIndex = i;
return(column);
}
}
return(null);
}
public DataGridViewColumn GetPreviousColumn(DataGridViewColumn dataGridViewColumnStart, DataGridViewElementStates includeFilter, DataGridViewElementStates excludeFilter)
{
if (dataGridViewColumnStart == null)
{
throw new ArgumentNullException("dataGridViewColumnStart");
}
if ((includeFilter & ~(DataGridViewElementStates.Visible | DataGridViewElementStates.Selected | DataGridViewElementStates.Resizable | DataGridViewElementStates.ReadOnly | DataGridViewElementStates.Frozen | DataGridViewElementStates.Displayed)) != DataGridViewElementStates.None)
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("DataGridView_InvalidDataGridViewElementStateCombination", new object[] { "includeFilter" }));
}
if ((excludeFilter & ~(DataGridViewElementStates.Visible | DataGridViewElementStates.Selected | DataGridViewElementStates.Resizable | DataGridViewElementStates.ReadOnly | DataGridViewElementStates.Frozen | DataGridViewElementStates.Displayed)) != DataGridViewElementStates.None)
{
throw new ArgumentException(System.Windows.Forms.SR.GetString("DataGridView_InvalidDataGridViewElementStateCombination", new object[] { "excludeFilter" }));
}
if (this.itemsSorted == null)
{
this.UpdateColumnOrderCache();
}
int columnSortedIndex = this.GetColumnSortedIndex(dataGridViewColumnStart);
if (columnSortedIndex == -1)
{
bool flag = false;
int num2 = -1;
int displayIndex = -1;
columnSortedIndex = 0;
while (columnSortedIndex < this.items.Count)
{
DataGridViewColumn column = (DataGridViewColumn)this.items[columnSortedIndex];
if (((column.StateIncludes(includeFilter) && column.StateExcludes(excludeFilter)) && ((column.DisplayIndex < dataGridViewColumnStart.DisplayIndex) || ((column.DisplayIndex == dataGridViewColumnStart.DisplayIndex) && (column.Index < dataGridViewColumnStart.Index)))) && ((column.DisplayIndex > displayIndex) || ((column.DisplayIndex == displayIndex) && (column.Index > num2))))
{
num2 = columnSortedIndex;
displayIndex = column.DisplayIndex;
flag = true;
}
columnSortedIndex++;
}
if (!flag)
{
return(null);
}
return((DataGridViewColumn)this.items[num2]);
}
columnSortedIndex--;
while (columnSortedIndex >= 0)
{
DataGridViewColumn column2 = (DataGridViewColumn)this.itemsSorted[columnSortedIndex];
if (column2.StateIncludes(includeFilter) && column2.StateExcludes(excludeFilter))
{
this.lastAccessedSortedIndex = columnSortedIndex;
return(column2);
}
columnSortedIndex--;
}
return(null);
}
