将自定义类的数组存储在设置文件中

Question

我有一门课：

public class CustomClass
{
    public string Columns;
    public string Filter;

    public string SourceDB;
    public string SourceTable;

    public string DestinationDB;
    public string DestinationTable;
}

在用户设置中，我需要存储一个CustomClass数组。这是因为我需要用户能够在 app.config 文件中指定多个 CustomClass。

Answer 1

您可以在 App.config 中声明 CustomClassSection，并在 CustomClass 实例的集合中声明。比如：

<configuration>
    <configSections>
        <section name="CustomClassSection" type = "A type of class section " />
    </configSections>
</configuration>

<CustomClassSection>
    <CustomClass Columns="column1" Filter="filter1" SourceDB="sourcedb1" SourceTable="sourcetable1" DestinationDB="destdb1" DestinationTable="desttable1"/>
    <CustomClass Columns="column2" Filter="filter2" SourceDB="sourcedb2" SourceTable="sourcetable2" DestinationDB="destdb2" DestinationTable="desttable2"/>
...
</CustomClassSection>

您可以在此处查看如何使用部分：How to create custom config section in app.config?。

Answer 2

您必须首先在项目设置文件中创建一个设置，我们将其命名为 CustomClasses。下一部分有点棘手，因为它涉及编辑 Settings.settings 文件的 XML：

<?xml version='1.0' encoding='utf-8'?>
<SettingsFile xmlns="http://schemas.microsoft.com/VisualStudio/2004/01/settings" 
              CurrentProfile="(Default)" 
              GeneratedClassNamespace="ConsoleApplication1.Properties" 
              GeneratedClassName="Settings">
  <Profiles />
  <Settings>
    <Setting Name="CustomClasses" 
             GenerateDefaultValueInCode="false" 
             Type="System.Collections.Generic.List&lt;ConsoleApplication1.CustomClass&gt;" 
             Scope="User">
    </Setting>
  </Settings>
</SettingsFile>

如果您打开 Settings.Designer.cs 文件，您现在应该有：

[global::System.Configuration.UserScopedSettingAttribute()]
[global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
public global::System.Collections.Generic
    .List<ConsoleApplication1.CustomClass> CustomClasses {
    get {
        return ((global::System.Collections.Generic
            .List<ConsoleApplication1.CustomClass>)(this["CustomClasses"]));
    }
    set {
        this["CustomClasses"] = value;
    }
}

您可以将设置保存在您的应用程序中：

class Program
{
    static void Main(string[] args)
    {
        Properties.Settings.Default.CustomClasses = new List<CustomClass>() {
            new CustomClass(){Columns="columns1"},
            new CustomClass(){Columns="columns2"},
            new CustomClass(){Columns="columns3"},
            new CustomClass(){Columns="columns4"}
        };
        Properties.Settings.Default.Save();
    }
}