public bool IsGameOver { get; protected set; }什么意思
时间: 2024-03-29 12:38:55 浏览: 23
这是一个 C# 中的属性定义,它有一个名为 IsGameOver 的布尔类型的属性,可以被外部访问,但只能在类内部被设置。外部代码可以读取这个属性的值,但不能直接修改它,只能在类内部进行修改。这样的设计可以保护属性值的正确性,并且在属性值发生变化的时候可以进行一些逻辑处理。通常情况下,属性的 get 方法用于获取属性的值,而 set 方法用于设置属性的值。在这个例子中,set 方法被设置为 protected,意味着只有该类及其子类可以修改属性值。
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c# code:public class APPServerContext : DbContext { public readonly string DBAias; public readonly string UserID; public APPServerContext(string dbaias, string userid); public bool IsSqlServer { get; } public DbSet<sysBatchCodeNO> SYS_BATCHCODENO { get; set; } public DbSet<sysListCodeNO> SYS_LISTCODENO { get; set; } public DbSet<SYS_ORGSTRUCTURE> SYS_ORGSTRUCTURE { get; set; } public DbSet<sysPrgWorkbench> SYS_PRGWORKBENCH { get; set; } public DbSet<sysBarCodeNO> SYS_BARCODENO { get; set; } public DbSet<SYS_LOGINUSER> SYS_LOGINUSERS { get; set; } public bool IsMySql { get; } public DbSet<SYS_ENANNOU> SYS_ENANNOUS { get; set; } public bool IsOracle { get; } public DbParameter CreateParameter(string Key, object Value); public override void Dispose(); public string GetDBParName(string parameterName); public Hashtable PBValue(string KeyList); protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder); } using APPServerContext context1 = new APPServerContext(LoginInfo.DBAias, LoginInfo.UserID);await context1.Database.BeginTransactionAsync().ConfigureAwait(false); context1.Database.SqlQuery(exeSqlList[i]); error : Execution Timeout Expired. The timeout period elapsed prior to completion of the operation or the server is not responding. question :APPServerContext does not contain CommandTimeOut. How do I handle this error
You can set the Command Timeout value in the DbContext's configuration options using the "CommandTimeout" property. You can do this either in the OnConfiguring method or when creating a new instance of DbContextOptionsBuilder. Here's an example of setting the Command Timeout value to 60 seconds:
```
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
optionsBuilder.UseSqlServer(connectionString)
.ConfigureWarnings(warnings => warnings.Throw(RelationalEventId.QueryClientEvaluationWarning))
.CommandTimeout(60);
}
```
Alternatively, you can also set the Command Timeout value when executing the SQL query using the "CommandTimeout" property of the DbCommand object. Here's an example:
```
using APPServerContext context1 = new APPServerContext(LoginInfo.DBAias, LoginInfo.UserID);
await context1.Database.BeginTransactionAsync().ConfigureAwait(false);
var command = context1.Database.GetDbConnection().CreateCommand();
command.CommandText = exeSqlList[i];
command.CommandTimeout = 60;
context1.Database.OpenConnection();
var result = await command.ExecuteNonQueryAsync().ConfigureAwait(false);
```
This will set the Command Timeout value to 60 seconds for the current SQL query execution.
自定义控件定义一个Border的外部属性,要求类型为Border,外部Border传入时才展示Border public partial class CustomFont : ItemsControl, INotifyPropertyChanged { public CustomFont() { InitializeComponent(); } private string title2 = string.Empty; /// <summary> /// 展示文字 /// </summary> public string Title2 { get { return title2; } set { title2 = value; OnPropertyChanged("Title2"); } } private bool showUnderline = false; // ... public bool ShowUnderline { get { return showUnderline; } set { showUnderline = value; OnPropertyChanged("ShowUnderline"); } } private double characterSpacing = 0; /// <summary> /// 字符间距 /// </summary> public double CharacterSpacing { get { return characterSpacing; } set { characterSpacing = value; OnPropertyChanged("CharacterSpacing"); } } public event PropertyChangedEventHandler PropertyChanged; protected void OnPropertyChanged(string propertyName) { if (PropertyChanged != null) { PropertyChanged(this, new PropertyChangedEventArgs(propertyName)); } } }
如果你想在自定义控件中定义一个 Border 类型的属性,可以在自定义控件的类中添加一个名为 Border 的属性,并在属性的 Set 方法中进行相应的操作。具体实现代码如下:
```
public partial class CustomControl : Control
{
public static readonly DependencyProperty BorderProperty =
DependencyProperty.Register("Border", typeof(Border), typeof(CustomControl), new PropertyMetadata(null));
public Border Border
{
get { return (Border)GetValue(BorderProperty); }
set { SetValue(BorderProperty, value); }
}
protected override void OnRender(DrawingContext drawingContext)
{
base.OnRender(drawingContext);
if (Border != null)
{
Border.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
Border.Arrange(new Rect(new Point(0, 0), Border.DesiredSize));
drawingContext.DrawRectangle(Border.Background, new Pen(Border.BorderBrush, Border.BorderThickness), new Rect(0, 0, Border.DesiredSize.Width, Border.DesiredSize.Height));
}
}
}
```
在 XAML 中使用该自定义控件时,可以在外部定义一个 Border 控件,并将它赋值给 CustomControl 的 Border 属性,如下所示:
```
<Window ...>
<Grid>
<Border x:Name="myBorder" BorderThickness="2" BorderBrush="Red">
<TextBlock Text="Hello, World!" />
</Border>
<local:CustomControl Border="{Binding ElementName=myBorder}" />
</Grid>
</Window>
```
这样,在 CustomControl 中就可以显示外部定义的 Border 了。注意,这里使用了数据绑定,需要在 CustomControl 的代码中实现 INotifyPropertyChanged 接口。