blob: 39654b1bd5b6da8bd77f5656ae4ac157e3855d68 (
plain)
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
41
42
|
using System.Collections.Generic;
using System.Text;
namespace Cmpp298.Assignment3.DataAccess {
public class UpdateQueryBuilder {
private IList< CommandParameter > _parameters;
private WhereClause _where;
public UpdateQueryBuilder( DatabaseColumn whereColumn, string whereValue )
: this( new List< CommandParameter >( ), new WhereClause( whereColumn, whereValue ) ) {}
public UpdateQueryBuilder( IList< CommandParameter > parameters, WhereClause where ) {
_parameters = parameters;
_where = where;
}
public IList< CommandParameter > Parameters {
get { return _parameters; }
}
public void Add( DatabaseColumn column, string value ) {
_parameters.Add( new CommandParameter( column.ColumnName, value ) );
}
public override string ToString( ) {
StringBuilder builder = new StringBuilder( );
builder.AppendFormat( "UPDATE [{0}] SET {1};", _where.Column.TableName, GetParameterNames( ) );
return builder.ToString( );
}
private string GetParameterNames( ) {
StringBuilder builder = new StringBuilder( );
foreach ( CommandParameter parameter in _parameters ) {
builder.AppendFormat( "[{0}].[{1}] = @{1},", _where.Column.TableName, parameter.ColumnName );
}
builder.Remove( builder.Length - 1, 1 );
builder.Append( _where );
return builder.ToString( );
}
}
}
|
