/// <summary>
/// This method is used to seek row for a table
/// </summary>
/// <param name="origin">Identify the origin position</param>
/// <param name="forwardSeek">Identify whether to seek row forward</param>
/// <param name="wantRowMovedCountout">Identify whether to return the actual moved row number</param>
/// <param name="enoughRow">Identify whether there is enough row to seek</param>
/// <returns>Table ROP return value</returns>
public TableRopReturnValues RopSeekRow(BookmarkType origin, bool forwardSeek, bool wantRowMovedCountout, bool enoughRow)
{
uint tempRowCount = this.GetRowsCount(forwardSeek); // Gets the number of rows from current location to begin row or last row.
RopSeekRowRequest seekRowRequest = new RopSeekRowRequest();
RopSeekRowResponse seekRowResponse;
seekRowRequest.RopId = 0x18;
seekRowRequest.LogonId = 0x00;
seekRowRequest.InputHandleIndex = 0x00;
seekRowRequest.Origin = (byte)origin;
if (origin == BookmarkType.BOOKMARK_BEGINNING)
{
if (forwardSeek)
{
if (enoughRow)
{
seekRowRequest.RowCount = (int)this.rowCount;
}
else
{
// Identify there is not enough row to forward seek.
seekRowRequest.RowCount = (int)(this.rowCount + 1);
}
}
else
{
if (enoughRow)
{
seekRowRequest.RowCount = 0;
}
else
{
seekRowRequest.RowCount = -1; // Identify there is not enough row to backward seek when the location is beginning.
}
}
}
else if (origin == BookmarkType.BOOKMARK_END)
{
if (forwardSeek)
{
if (enoughRow)
{
seekRowRequest.RowCount = 0;
}
else
{
seekRowRequest.RowCount = 1;
}
}
else
{
if (enoughRow)
{
seekRowRequest.RowCount = -(int)this.rowCount;
}
else
{
seekRowRequest.RowCount = -(int)(this.rowCount + 1);
}
}
}
else
{
if (forwardSeek)
{
if (enoughRow)
{
seekRowRequest.RowCount = (int)tempRowCount;
}
else
{
seekRowRequest.RowCount = (int)(tempRowCount + 1);
}
}
else
{
if (enoughRow)
{
seekRowRequest.RowCount = -(int)tempRowCount;
}
else
{
seekRowRequest.RowCount = -(int)(tempRowCount + 1);
}
}
}
seekRowRequest.WantRowMovedCount = Convert.ToByte(wantRowMovedCountout);
this.rowCountInSeekRowRequest = seekRowRequest.RowCount;
this.DoSingleCallROP(seekRowRequest, this.tableHandle, ref this.response, ref this.rawData);
seekRowResponse = (RopSeekRowResponse)this.response;
this.ropType = TableRopType.MOVECURSOR;
bool hasSoughtLess = false;
bool isActualRowsCount = false;
if (wantRowMovedCountout)
{
hasSoughtLess = Convert.ToBoolean(seekRowResponse.HasSoughtLess);
if (origin == BookmarkType.BOOKMARK_BEGINNING)
{
if (forwardSeek)
{
isActualRowsCount = seekRowResponse.RowsSought == this.rowCount;
}
else
{
isActualRowsCount = seekRowResponse.RowsSought == 0;
}
}
if (origin == BookmarkType.BOOKMARK_END)
{
if (forwardSeek)
{
isActualRowsCount = seekRowResponse.RowsSought == 0;
}
else
{
isActualRowsCount = seekRowResponse.RowsSought == -this.rowCount;
}
}
if (origin == BookmarkType.BOOKMARK_CURRENT)
{
isActualRowsCount = System.Math.Abs(seekRowResponse.RowsSought) == tempRowCount;
}
}
else
{
hasSoughtLess = true;
isActualRowsCount = true;
}
if (this.RopSeekRowResponse != null)
{
this.RopSeekRowResponse(wantRowMovedCountout, enoughRow, hasSoughtLess, isActualRowsCount);
}
return (TableRopReturnValues)seekRowResponse.ReturnValue;
}
