1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
namespace System.Web.UI.WebControls.Expressions {
using System.Web.Query.Dynamic;
using System;
using System.Linq.Expressions;
using System.Security.Permissions;
using System.Text.RegularExpressions;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Collections.Generic;
using System.Linq;
[
PersistChildren(false),
ParseChildren(true, "Parameters")
]
public class CustomExpression : ParameterDataSourceExpression {
private EventHandler<CustomExpressionEventArgs> _querying;
public event EventHandler<CustomExpressionEventArgs> Querying {
add {
_querying += value;
}
remove {
_querying -= value;
}
}
public override IQueryable GetQueryable(IQueryable source) {
CustomExpressionEventArgs e = new CustomExpressionEventArgs(source, GetValues());
OnQuerying(e);
return e.Query;
}
private void OnQuerying(CustomExpressionEventArgs e) {
if (_querying != null) {
_querying(this, e);
}
}
}
}
|
