给Spread控件添加对高DPI的支持

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越来越多的用户使用高分屏作为客户端显示器，通常会将屏幕缩放比例设置为大于100%，此时winforms应用如果没有配置对高dpi的支持，可能出现显示大小不符预期，显示模糊，错位等问题

要给Spread控件添加对高DPI的支持，首先也需要先给所在的winform应用本身设置高分支持

以.NET Framework 4.7 以上的应用为例，设置步骤如下
1.将包含以下信息的 App.config 添加到表单的根目录（与 Program.cs 相同的目录）。

<?xml version="1.0" encoding="utf-8"?>
<configuration>
<startup>
<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7"/>
</startup>
<System.Windows.Forms.ApplicationConfigurationSection>
<add key="DpiAwareness" value="PerMonitorV2"/>
<!--
<add key="Form.DisableSinglePassScalingOfDpiForms" value="true"/>
<add key="ToolStrip.DisableHighDpiImprovements" value="true"/>
<add key="CheckedListBox.DisableHighDpiImprovements" value="true"/>
<add key="MonthCalendar.DisableHighDpiImprovements" value="true"/>
<add key="AnchorLayout.DisableHighDpiImprovements" value="true"/>
<add key="DataGridView.DisableHighDpiImprovements" value="true"/>
-->
</System.Windows.Forms.ApplicationConfigurationSection>
</configuration>

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2.将包含以下信息的 App.manifest 添加到表单的根目录（与 Program.cs 目录相同）。

<?xml version="1.0" encoding="utf-8"?>
<assembly manifestVersion="1.0" xmlns="urn:schemas-microsoft-com:asm.v1">
<assemblyIdentity version="1.0.0.0" name="MyApplication.app"/>
<trustInfo xmlns="urn:schemas-microsoft-com:asm.v2">
<security>
<requestedPrivileges xmlns="urn:schemas-microsoft-com:asm.v3">
<!-- UAC Manifest Options
If you want to change the Windows User Account Control level replace the
requestedExecutionLevel node with one of the following.
<requestedExecutionLevel level="asInvoker" uiAccess="false" />
<requestedExecutionLevel level="requireAdministrator" uiAccess="false" />
<requestedExecutionLevel level="highestAvailable" uiAccess="false" />
Specifying requestedExecutionLevel element will disable file and registry virtualization.
Remove this element if your application requires this virtualization for backwards
compatibility.
-->
<requestedExecutionLevel level="asInvoker" uiAccess="false" />
</requestedPrivileges>
</security>
</trustInfo>
<compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
<application>
<!-- A list of the Windows versions that this application has been tested on and is
is designed to work with. Uncomment the appropriate elements and Windows will
automatically selected the most compatible environment. -->
<supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />
</application>
</compatibility>
<!--<application xmlns="urn:schemas-microsoft-com:asm.v3">
<windowsSettings>
<dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true</dpiAware>
</windowsSettings>
</application>-->
</assembly>

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3.验证 Program.cs 是否具有以下设置。

static class Program
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
Application.Run(new Form1());
}
}

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4.在 Form1.designer.cs 中添加以下对Form和Spread的设置

this.fpSpread1.SpreadScaleMode = FarPoint.Win.Spread.ScaleMode.ZoomDpiSupport;
this.AutoScaleDimensions = new System.Drawing.SizeF(96F, 96F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Dpi;

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给Spread控件添加对高DPI的支持

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