The CData ADO.NET Provider for Google Drive implements standard ADO.NET data access components that can be used with third-party controls. The standard ADO.NET process for databinding can be followed to enable bidirectional access to live data from UI controls. In this article we show how to use the CData components to databind to the DevExpress Windows Forms and Web controls; you will databind to a chart that displays current data.
Google Drive はOAuth 認証標準を利用しています。各ユーザーやドメイン内のユーザーの代わりに、本製品がGoogle API にアクセスすることを許可できます。 接続すると、本製品はデフォルトブラウザでOAuth エンドポイントを開きます。ログインして、アプリケーションにアクセス許可を与えます。本製品がOAuth プロセスを完了します。
詳細はドライバーのヘルプドキュメントを参照してください。
The code below shows how to populate a DevExpress chart with Google Drive data. The GoogleDriveDataAdapter binds to the Series property of the chart control. The Diagram property of the control defines the x- and y-axes as the column names.
using (GoogleDriveConnection connection = new GoogleDriveConnection(
"")) {
GoogleDriveDataAdapter dataAdapter = new GoogleDriveDataAdapter(
"SELECT Name, Size FROM Files", connection);
DataTable table = new DataTable();
dataAdapter.Fill(table);
DevExpress.XtraCharts.Series series = new DevExpress.XtraCharts.Series();
chartControl1.Series.Add(series);
series.DataSource = table;
series.ValueDataMembers.AddRange(new string[] { "Size" });
series.ArgumentScaleType = DevExpress.XtraCharts.ScaleType.Qualitative;
series.ArgumentDataMember = "Name";
series.ValueScaleType = DevExpress.XtraCharts.ScaleType.Numerical;
chartControl1.Legend.Visibility = DevExpress.Utils.DefaultBoolean.False;
((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true;
}
The code below shows how to populate a DevExpress Web control with Google Drive data. The GoogleDriveDataAdapter binds to the Series property of the chart; the Diagram property defines the x- and y-axes as the column names.
using DevExpress.XtraCharts;
using (GoogleDriveConnection connection = new GoogleDriveConnection(
""))
{
GoogleDriveDataAdapter GoogleDriveDataAdapter1 = new GoogleDriveDataAdapter("SELECT Name, Size FROM Files", connection);
DataTable table = new DataTable();
GoogleDriveDataAdapter1.Fill(table);
DevExpress.XtraCharts.Series series = new Series("Series1", ViewType.Bar);
WebChartControl1.Series.Add(series);
series.DataSource = table;
series.ValueDataMembers.AddRange(new string[] { "Size" });
series.ArgumentScaleType = ScaleType.Qualitative;
series.ArgumentDataMember = "Name";
series.ValueScaleType = ScaleType.Numerical;
((DevExpress.XtraCharts.SideBySideBarSeriesView)series.View).ColorEach = true;
}
