C# Visio 二次開發：縮放操作實現（二）——SetZoom 完整邏輯與自訂縮放比例

SetZoom 核心實現

private void SetZoom(string zoomText)
{
    switch (zoomText)
    {
        case "400%": VisApplication.DoCmd((short)VisUICmds.visCmdView400); break;
        case "200%": VisApplication.DoCmd((short)VisUICmds.visCmdView200); break;
        case "150%": VisApplication.DoCmd((short)VisUICmds.visCmdView150); break;
        case "100%": VisApplication.DoCmd((short)VisUICmds.visCmdView100); break;
        case "75%":  VisApplication.DoCmd((short)VisUICmds.visCmdView75); break;
        case "50%":  VisApplication.DoCmd((short)VisUICmds.visCmdView50); break;
        case "上次": VisApplication.DoCmd((short)VisUICmds.visCmdZoomLast); break;
        case "寬度": VisApplication.DoCmd((short)VisUICmds.visCmdZoomSingleTile); break;
        case "頁":   VisApplication.DoCmd((short)VisUICmds.visCmdZoomPageWidth); break;
        case "縮放": VisApplication.DoCmd((short)VisUICmds.visCmdViewCustom); break;
        default: CustomedSize(zoomText); break;
    }
}

private void CustomedSize(string zoomText)
{
    try
    {
        double zoomSize = Convert.ToDouble(zoomText.Replace("%", ""));
        this.VisWindow.Zoom = zoomSize / 100;
        this.tsStandard_Zoom.Text = zoomSize + "%";
    }
    catch { }
}

功能完整性

• 預設縮放等級：50%~400% 七檔
• 特殊功能：上次縮放、頁面寬度、整頁顯示、自訂縮放對話框
• 自訂百分比：解析輸入文字（如 "125%"），直接設定 VisWindow.Zoom 屬性（0.01~100）
• UI 同步：更新工具列下拉框顯示文字

VisUICmds 關鍵命令對照