/// <summary>
/// Handles the OnDemandDataSourceLoad event of the dataPager control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="Syncfusion.Windows.Controls.Grid.GridDataOnDemandPageLoadingEventArgs"/> instance containing the event data.</param>
private async void dataPager_OnDemandDataSourceLoad(object sender, GridDataOnDemandPageLoadingEventArgs e)
{
DataPagerExt ex = e.Source as DataPagerExt;
ViewModel dataContext = this.AssociatedObject.DataContext as ViewModel;
bool IsCache = false;
//Assigning number of rows to be fetched from HBase
HBaseOperation.FetchSize = 5000;
if (!dataContext.ResultCollection.ContainsKey(ex.PageIndex) && HBaseOperation.HasRows)
{
dataContext.OrderDetails = await HBaseOperation.ScanTableAsync(dataContext.TableName, dataContext.Connection);
dataContext.ResultCollection.Add(ex.PageIndex == -1 ? 1 : ex.PageIndex, dataContext.OrderDetails);
IsCache = false;
}
else
{
dataContext.OrderDetails = dataContext.ResultCollection[ex.PageIndex];
IsCache = true;
}
bool IsPrevious = PreviousPageIndex > ex.PageIndex;
if (!IsPrevious && HBaseOperation.HasRows && !IsCache)
{
if (ex.PageIndex != -1)
{
ex.PageCount = ex.PageCount + 1;
}
}
PreviousPageIndex = ex.PageIndex == -1 ? 1 : ex.PageIndex;
}
/// <summary>
/// Handles the OnDemandDataSourceLoad event of the dataPager control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="Syncfusion.Windows.Controls.Grid.GridDataOnDemandPageLoadingEventArgs"/> instance containing the event data.</param>
async void dataPager_OnDemandDataSourceLoad(object sender, GridDataOnDemandPageLoadingEventArgs e)
{
DataPagerExt ex = e.Source as DataPagerExt;
ViewModel dataContext = this.AssociatedObject.DataContext as ViewModel;
bool IsCache = false;
if (!dataContext.ResultCollection.ContainsKey(ex.PageIndex) && dataContext.DataReader.HasRows)
{
dataContext.OrderDetails = await dataContext.DataReader.FetchResultAsync();
dataContext.ResultCollection.Add(ex.PageIndex == -1 ? 1 : ex.PageIndex, dataContext.OrderDetails);
IsCache = false;
}
else
{
dataContext.OrderDetails = dataContext.ResultCollection[ex.PageIndex];
IsCache = true;
}
bool IsPrevious = PreviousPageIndex > ex.PageIndex;
if (!IsPrevious && dataContext.DataReader.HasRows && !IsCache)
{
if (ex.PageIndex != -1)
{
ex.PageCount = ex.PageCount + 1;
}
}
PreviousPageIndex = ex.PageIndex == -1 ? 1 : ex.PageIndex;
}
