protected virtual void OnExecute(DataExistContext context, ExistStatement statement)
{
//根据生成的脚本创建对应的数据命令
var command = context.Session.Build(statement);
//执行命令
var result = command.ExecuteScalar();
if (result == null || System.Convert.IsDBNull(result))
{
context.Result = false;
}
else
{
context.Result = Zongsoft.Common.Convert.ConvertValue <bool>(result);
}
}
public void Test()
{
const string NAME = "Asset";
var accessor = new DataAccess(APPLICATION_NAME);
var context = new DataExistContext(accessor,
NAME, //name
Condition.Equal("PrincipalId", 100) // Condition.Equal("Principal.User.Name", "Popeye"), //condition
);
var statements = context.Build().ToArray();
Assert.NotNull(statements);
Assert.NotEmpty(statements);
var command = context.Session.Build(statements[0]);
Assert.NotNull(command);
Assert.NotNull(command.CommandText);
Assert.True(command.CommandText.Length > 0);
System.Diagnostics.Debug.WriteLine(command.CommandText);
}
