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Filtering by Date only using RadFilter

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Scott
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Scott asked on 05 Jul 2010, 12:48 PM
I'm having some issues with the RadFilter.

I'm using an Image Folder as a datasource and using the following command to pull all the DataFields within the folder;

Dim dirInfo As New DirectoryInfo(Server.MapPath("~/GalleryFiles"))

RadListView1.DataSource = dirInfo.GetFiles("*.jpg")
RadListView1.DataBind() 

from all the possible DataFields I'm only using the "Name" and "LastWriteTime" Fields. I want to be able to use the "LastWriteTime" field and filter it purely based on the date it pulls. Is there a way to get RadFilter to ignore the Time parameter as images will be created regularly and the time filter is too precise.

Any feedback would be much appreciated.

Thank you 


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Nikolay Rusev
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answered on 07 Jul 2010, 09:15 AM
Hello Jason,

For your convenience I've prepared sample application demonstrating one possible way of changing default filtering behavior. In general you can change the filtering on DateTime to between filtering and adding 1 minute(in current example) to original value.

Greetings,
Nikolay
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Scott
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answered on 07 Jul 2010, 03:07 PM
In your attached example I am still unable to filter results by date only with the LastWriteTime field. If I choose the date 7/7/2010 The TimePicker defaults the time as 00:00, the fiter removes all results due to their time stamp being 14:26. I would like to exclude the time from the filter completely.

I have tried a Between version also, using your demo examples for the RadGrid Filter templates. Every time I pick a date the page posts back and resets the selected date to the focused date. 
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Nikolay Rusev
Telerik team
answered on 12 Jul 2010, 02:09 PM
Hello Jason,

You can change the following code to add one day instead one of minute as in my previous example:
..
RadListViewLessThanOrEqualToFilterExpression<DateTime> lt = new RadListViewLessThanOrEqualToFilterExpression<DateTime>(expression.FieldName)
{
  CurrentValue = value.AddDays(1)
};
..


All the best,
Nikolay
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Scott
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answered on 12 Jul 2010, 03:35 PM
Thank you,

I am building using vb.net, will this code translate ok?

Also.. is it possible to tidy up I.e remove items from the drop down list that displays directory elements to only show Lastwrite time and name?

Regards
J
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Nikolay Rusev
Telerik team
answered on 14 Jul 2010, 01:42 PM
Hello Jason,

For your convenience I am attaching VB version of the code + JavaScript code for hiding items from RadFilter context menu.

All the best,
Nikolay
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Scott
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answered on 20 Jul 2010, 04:45 PM
Hi

Would it be possible to help show me how I could get a radrotator bound with the file array after the date has been chosen. I have a working example as supplied with a standard calendar control but cannot integrate this using the radfilter as supplied.

 

 

Sub Calendar1_SelectionChanged(ByVal sender As Object, ByVal e As System.EventArgs)

 

 

 

 

Dim dir As New DirectoryInfo(Server.MapPath("~/GalleryFiles/Camera1"))

 

 

 

Dim files As FileInfo() = dir.GetFiles("*.thumbnail.jpg")

 

 

 

Dim count As Integer = files.Length

 

 

 

Dim i As Integer

 

 

 

Dim jFiles As String

 

 

 

Dim dt As String

 

dt = Calendar1.SelectedDate.ToShortDateString()

 

 

 

' holds the result, which will be used in order to rebind the RadRotator control

 

 

 

Dim resultDataSource As List(Of String) = New List(Of String)()

 

 

 

 

For i = 0 To count - 1

 

 

 

Dim theDate As Integer = DateDiff(DateInterval.Day, files(i).LastWriteTime, Calendar1.SelectedDate)

 

 

 

Dim virtualPath As String = "~/GalleryFiles/Camera1"

 

 

 

 

If theDate = 0 Then

 

jFiles = jFiles &

 

"<li><img style="" width:50px"" src='../GalleryFiles/Camera1/" & files(i).Name.Substring(0, 16) & ".jpg'' ><a href='../GalleryFiles/Camera1/" & files(i).Name.Substring(0, 16) & ".jpg'>" & files(i).Name.Substring(0, 16) & " " & files(i).LastWriteTime.Date & "</a></li>"

 

 

 

 

' Add the files in the new DataSource

 

 

 

'resultDataSource.AddRange(dir.GetFiles(files(i).Name))

 

 

 

'resultDataSource.Add(files(i).Name)

 

resultDataSource.Add(files(i).Name.Substring(0, 16))

 

 

End If

 

 

 

Next

 

 

 

 

' Rebind the control

 

 

 

' If no files are found, thne the RadRotator will contain 0 items and will not show any content

 

RadRotator1.DataSource = resultDataSource

RadRotator1.DataBind()

 

list.Text =

 

"</ul>" & jFiles

 

Label1.Text = dt

 

 

End Sub





PS. Thank you very much for the most recent help.

J

 

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Nikolay Rusev
Telerik team
answered on 23 Jul 2010, 09:56 AM
Hello Jason,

If I understand your scenario correctly, you are trying to filter against RadRotator. If this is the case you can use the following approach.
1. Define in FieldEditors for RadFilter
 2. Build custom provider that will process expressions in for DateTime in expected for your scenario way
 3. Handle ApplyExpressions event of RadFilter to apply the filter criteria on RadRotator data source. For the purpose you can use the help of DynamicLinq.

For your convenience I am attaching sample application demonstrating described above case.

Regards,
Nikolay
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