How do I use the datagridview row filter to exclude between a range of integers?

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Here is the code I have now:

Dim startYear As Integer, endYear As Integer
        If CheckBox1.Checked = True Then
            If Integer.TryParse(startyear.Text, startYear) AndAlso Integer.TryParse(endyear.Text, endYear) Then
                datat.DefaultView.RowFilter = "[startofyear] >=  '" & startyear.Text & "' and [endofyear] <= '" & endyear.Text & "'"

            End If
        End If

This filters out by the year, showing the result between both textbox years. However, I am looking to do an exclude function which will start at startyear and end at endyear, but gets all values in between. For instance my year range might be 2000-2005 I would want to exclude from the data set. So, 2000, 2001, 2002, 2003, 2005, and 2005 all would be exlcuded.

What I have tried:

I tried to use not in my statement. for instance,

datat.DefaultView.RowFilter = "not [startofyear] >=  '" & startyear.Text & "' and [endofyear] <= '" & endyear.Text & "'"

I have also tried

datat.DefaultView.RowFilter = "[startofyear] <>  '" & startyear.Text & "' and [endofyear] <> '" & endyear.Text & "'"

this seemed to almost exclude everything, so I know that its wrong based on the data filtered and displayed in datagridview.

Posted 10-Apr-18 4:25am

Member 11856456

Updated 10-Apr-18 8:01am

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Comments

Kornfeld Eliyahu Peter 10-Apr-18 10:52am

It should work just like SQL, so you can try BETWEEN...
But if you want to include lower bound but exclude upper you should use this formula:
lower <= vale < upper

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Maciej Los · Accepted Answer · 2018-04-10T08:02:00

Solution 1

Quote:
I would want to exclude from the data set. So, 2000, 2001, 2002, 2003, 2005, and 2005 all would be exlcuded.

It's quite simple... Depending on situation, you may use:

VB

datat.DefaultView.RowFilter = String.Format("([startofyear] NOT BETWEEN {0} AND {1}) OR ([endofyear] NOT BETWEEN {0} AND {1})", startyear.Text, endyear.Text)
'or
datat.DefaultView.RowFilter = String.Format("([endofyear] < {0} OR [startofyear] > {1})", startyear.Text, endyear.Text)

For further details, please see:
DataView.RowFilter Property (System.Data)[^]
DataColumn.Expression Property (System.Data)[^]

[EDIT]
I almost forgot...
To help you understand date overlapping, read this: Time Period Library for .NET[^]

Posted 10-Apr-18 8:02am

Maciej Los

Updated 10-Apr-18 8:08am

v2

Comments

Member 11856456 10-Apr-18 15:01pm

I am getting this error: "The expression contains unsupported operator 'Between'.'"

Maciej Los 10-Apr-18 15:18pm

Strange...
Between is proper expression. So, try second solution.

Member 11856456 10-Apr-18 15:44pm

The first one didn't work. however, the second solution worked perfectly. I am a little confused on how it works. Can you please explain to me how this solution works so I can possibly manipulate the solution if I need to. Originally I tried to use the and statement to say in between this and that exclude these, but that didn't work. So I am so interested on why this OR statement works the way I need it to?

Maciej Los 10-Apr-18 15:49pm

Glad, i can help. For details, follow the link i added at the end of my answer ;)
Cheers,
Maciej

Maciej Los 11-Apr-18 2:30am

Think of it... Test below code to find out why OR is working fine and AND operator does not:

DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("startofyear", typeof(int)));
dt.Columns.Add(new DataColumn("endofyear", typeof(int)));

Random rs = new Random();
Random re = new Random();
dt = Enumerable.Range(0, 100)
	.Select(x=> dt.LoadDataRow(new object[]{rs.Next(1995, 2010), rs.Next(1995, 2010) + re.Next(1, 11)}, false))
	.CopyToDataTable();
	
int[] yearsToExclude = {2000,2005};

var result = dt.AsEnumerable()
	.Select(x=> new
	{
		startofyear	= x.Field<int>("startofyear"),
		endofyear = x.Field<int>("endofyear"),
		And_Operator = x.Field<int>("endofyear") < yearsToExclude[0] &&  x.Field<int>("startofyear") > yearsToExclude[1], 
		Or_Operator = x.Field<int>("endofyear") < yearsToExclude[0] ||  x.Field<int>("startofyear") > yearsToExclude[1]
	})
	.ToList();

Cheers,
Maciej