本文整理汇总了C#中SimpleQuery.Exists方法的典型用法代码示例。如果您正苦于以下问题：C# SimpleQuery.Exists方法的具体用法？C# SimpleQuery.Exists怎么用？C# SimpleQuery.Exists使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类SimpleQuery的用法示例。
在下文中一共展示了SimpleQuery.Exists方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: Execute
/// <summary>
/// Executes the command.
/// </summary>
/// <param name="dataStrategy">The data strategy.</param>
/// <param name="table"></param>
/// <param name="binder">The binder from the <see cref="DynamicTable"/> method invocation.</param>
/// <param name="args">The arguments from the <see cref="DynamicTable"/> method invocation.</param>
/// <returns></returns>
public object Execute(DataStrategy dataStrategy, DynamicTable table, InvokeMemberBinder binder, object[] args)
{
var query = new SimpleQuery(dataStrategy, table.GetQualifiedName());
if (args.Length == 1 && args[0] is SimpleExpression)
{
query = query.Where((SimpleExpression)args[0]);
}
return query.Exists();
}示例2: Execute
/// <summary>
/// Executes the command.
/// </summary>
/// <param name="dataStrategy">The data strategy.</param>
/// <param name="table"></param>
/// <param name="binder">The binder from the <see cref="DynamicTable"/> method invocation.</param>
/// <param name="args">The arguments from the <see cref="DynamicTable"/> method invocation.</param>
/// <returns></returns>
public object Execute(DataStrategy dataStrategy, DynamicTable table, InvokeMemberBinder binder, object[] args)
{
var query = new SimpleQuery(dataStrategy, table.GetQualifiedName());
if (args.Length == 1)
{
var criteria = args[0] as SimpleExpression;
if (criteria != null)
{
query = query.Where(criteria);
}
else
{
throw new BadExpressionException(binder.Name + " requires an expression.");
}
}
else if (args.Length != 0)
{
throw new BadExpressionException(binder.Name + " requires an expression.");
}
return query.Exists();
}