/// <summary>
/// ComputeAndRefresh DataColumn
/// </summary>
/// <param name="colID"></param>
/// <param name="removeHandler"></param>
/// <param name="colVal"></param>
private void ComputeAndRefreshColumn(int colID, bool removeHandler, ref object colVal)
{
Field field = null;
if (colID > 0)
{
int fldIdx = DVDataTableObj.GetFldIdx(colID);
field = (Field)DVControl.getForm().getTask().DataView.getField(fldIdx);
}
//First column is 'Isn'. Give a call to core to fetch PosCache's current Isn. And store it
if (colID == 0)
{
colVal = (int)((TaskBase)DVControl.getForm().getTask()).GetDVControlPosition();
}
else if (field != null)
{
String value = String.Empty;
Object dnValue = null;
bool isNull = false;
//get field's value by
((TaskBase)field.getTask()).getFieldDisplayValue(field, ref value, ref isNull);
dnValue = DNConvert.convertMagicToDotNet(value, field.getType(), typeof(Object));
colVal = dnValue;
}
}
/// <summary>Reject column changes in DataTable.
/// </summary>
/// <param name="pos"></param>
/// <param name="fldIdx"></param>
public void RejectColumnChanges(int pos, int fldIdx)
{
DVDataTableObj.CurrRow = pos;
int colID = DVDataTableObj.GetColumnId(fldIdx - 1);
Commands.addAsync(GuiCommandType.REJECT_DVCONTROL_COLUMN_CHANGES, DVControl, DVDataTableObj.CurrRow, colID, DVDataTableObj.DataTblObj);
Commands.beginInvoke();
}
/// <summary>
/// This will be called, while fetching records into DataTable at the start to create row.
/// </summary>
/// <param name="idx"></param>
internal void checkAndCreateRow(int idx)
{
if (!DVControl.getForm().getTask().DataView.isEmptyDataview())
{
if (!initialDataLoading)
{
// When new row is created in dataTable,"Isn" column which is primary key of dataTable
// need to be initialized. this invokes of DataTable's ColumnChanged Handler. So, in order to avoid
// this, DVControl Handler should be unregisterd before creating new row.
Commands.addAsync(GuiCommandType.REMOVE_DVCONTROL_HANDLER, DVControl, DVDataTableObj.DataTblObj);
DVDataTableObj.checkAndCreateRow(idx);
Commands.addAsync(GuiCommandType.ADD_DVCONTROL_HANDLER, DVControl, DVDataTableObj.DataTblObj);
}
else
{
DVDataTableObj.CurrRow = idx;
}
}
}
/// <summary>compute DataTable's column value
/// </summary>
/// <param name="fldIdx">Identifies DataColumn.</param>
public void ComputeColumnValue(int fldIdx)
{
int colID = -1;
//if fldIdx is 0, means it's first column i.e. "Isn"
if (fldIdx == 0)
{
colID = 0;
}
else
{
colID = DVDataTableObj.GetColumnId(fldIdx - 1);
}
object colVal = null;
ComputeAndRefreshColumn(colID, true, ref colVal);
Commands.addAsync(GuiCommandType.UPDATE_DVCONTROL_COLUMN, DVDataTableObj, DVDataTableObj.CurrRow, colID, colVal);
Commands.beginInvoke();
}
/// <summary>Refresh row of DVControl.
/// </summary>
internal void RefreshDisplay()
{
if (DVDataTableObj.ColumnList != null && !DVControl.getForm().getTask().DataView.isEmptyDataview())
{
object[] row = new object[DVDataTableObj.DataTblObj.Columns.Count];
for (int i = 0; i <= DVDataTableObj.ColumnList.Count; i++)
{
ComputeAndRefreshColumn(i, false, ref row[i]);
}
if (initialDataLoading)
{
DVDataTableObj.LoadNewRow(row);
}
else
{
Commands.addAsync(GuiCommandType.UPDATE_DVCONTROL_ROW, DVDataTableObj, DVDataTableObj.CurrRow, row);
}
}
}
