【Stimulsoft Reports.WinForms教程】使用自動更新的實時報表預覽

---

【下載Stimulsoft Reports.Ultimate最新版本】

此示例構建具有自動內容更新的實時實時報表。例如，使用帶有一些文本的報表和帶有兩個系列的圖表。在Form1初始化方法中，找到必要的報表組件，報表從應用程序資源加載：

private StiText text = null;
private StiChart chart = null;
 
public Form1()
{
    //
    // Required for Windows Form Designer support
    //
    InitializeComponent();
 
    stiReport1.Render();
    StiComponentsCollection comps = stiReport1.RenderedPages[0].GetComponents();
    text = comps["Text1"] as StiText;
    chart = comps["Chart1"] as StiChart;
}

所述timer1_Tick定時器事件改變所選擇的報表組件（如角度）的屬性，并重繪報表。首先，應用文本輪換：

private System.Windows.Forms.Timer timer1;
 
private void timer1_Tick(object sender, System.EventArgs e)
{
    if (text == null)return;
 
    //Rotate text
    float angle = text.TextOptions.Angle;
    angle -= 1f;
    if (angle < 0)angle = 359;
    text.TextOptions.Angle = angle;
...

接下來，由于圖表示例有兩個系列，因此應對每個系列進行旋轉：

...
    //Rotate series 1
    angle = ((StiDoughnutSeries)chart.Series[0]).StartAngle;
    angle -= 1f;
    if (angle < 0)angle = 359;
    ((StiDoughnutSeries)chart.Series[0]).StartAngle = angle;
 
    //Rotate series 2
    angle = ((StiDoughnutSeries)chart.Series[1]).StartAngle;
    angle += 1f;
    if (angle > 359)angle = 0;
    ((StiDoughnutSeries)chart.Series[1]).StartAngle = angle;
...

最后，實時更新報表：

...
    RectangleD rect = stiPreviewControl1.GetComponentRect(text);
    stiPreviewControl1.InvalidatePageRect(rect.ToRectangle());
 
    rect = stiPreviewControl1.GetComponentRect(chart);
    stiPreviewControl1.InvalidatePageRect(rect.ToRectangle());
    //stiPreviewControl1.View.Invalidate(); 
}

示例代碼的結果如下圖所示：