/// <summary>
/// Go to the previous "page"
/// </summary>
/// <returns>bool if this worked</returns>
public bool Previous()
{
var result = false;
var hasScrollInfo = TryRetrievePosition(out var scrollInfoBefore);
switch (ScrollMode)
{
case ScrollModes.KeyboardPageUpDown:
result = KeyboardInputGenerator.KeyPresses(VirtualKeyCode.Prior) == 2;
break;
case ScrollModes.WindowsMessage:
result = SendScrollMessage(ScrollBarCommands.SB_PAGEUP);
break;
case ScrollModes.AbsoluteWindowMessage:
if (!hasScrollInfo)
{
return(false);
}
// Calculate previous position, clone the scrollInfoBefore
var scrollInfoForPrevious = scrollInfoBefore;
scrollInfoForPrevious.Position = Math.Max(scrollInfoBefore.Minimum, scrollInfoBefore.Position - (int)scrollInfoBefore.PageSize);
result = ApplyPosition(ref scrollInfoForPrevious);
break;
case ScrollModes.MouseWheel:
var bounds = ScrollingWindow.GetInfo().Bounds;
var middlePoint = new NativePoint(bounds.X + bounds.Width / 2, bounds.Y + bounds.Height / 2);
result = MouseInputGenerator.MoveMouseWheel(WheelDelta, middlePoint) == 1;
break;
}
return(result);
}
// retrieve a value by name from a scroll window
// adapted from James Lyn
// https://jamesdlyn.wordpress.com/tag/microsoft-dynamics-gp-sdk/
private DataTable GetScrollWindowValues(ScrollingWindow sender)
{
// output
DataTable dt = new DataTable();
dt.Columns.Add("Name", typeof(String));
dt.Columns.Add("Value", typeof(String));
//Loop through each field
foreach (var field in sender.Fields)
{
string name = "";
string value = "";
try
{
//Loop through the properties of the field looking for Name and Value
foreach (var prop in field.GetType().GetProperties())
{
switch (prop.Name)
{
case "Name":
name = Convert.ToString(prop.GetValue(field, null)).Trim();
break;
case "Value":
value = Convert.ToString(prop.GetValue(field, null)).Trim();
break;
}
}
}
catch { }
//Do not output rows that have blank fields
if (!string.IsNullOrEmpty(name) && !string.IsNullOrEmpty(value))
{
DataRow row = dt.NewRow();
row["Name"] = name;
row["Value"] = value;
dt.Rows.Add(row);
}
}
return(dt);
}