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Help with filtering data in GridView based on data entered in a Textbox Textchanged event

Posted on 2011-09-22
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Last Modified: 2012-05-12
Hello,

I am trying the code below in the Textboxes' Textchanged event to filter the data displayed on a Grid based on the text entered in a Textbox. However the code is not working with the dataset (ds) in the filter satement. can you please help me fix this error. The code also doesn't trigger in the Textchange event is their a way to execute the code everytime the user enters a text?

       Dim ds As New DataSet
        ds.ReadXml(Server.MapPath("~/App_Data/Country.xml"))
        GridView1.DataSource = ds.Tables(0)
        GridView1.DataBind()
        Dim SearchCriteria As String
        SearchCriteria = " Country IN (" & TextBox1.Text & " )"
        Dim FilteredDT As DataTable
        Dim DV As New DataView(ds, SearchCriteria, Nothing, DataViewRowState.CurrentRows) ***Error with ds in statement above
        FilteredDT = DV.ToTable
        GridView1.DataSource = FilteredDT
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Comment
Question by:vcharles
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  • 2
7 Comments
 

Author Comment

by:vcharles
ID: 36582295
Hi,

I just tried the approach below but received the following error:
"Filter expression 'country' does not evaluate to a Boolean term."
How do I fix this error?

Cide:
 Dim ds As New DataSet
        ds.ReadXml(Server.MapPath("~/App_Data/Country.xml"))
        Dim dv As New DataView(ds.Tables(0))
        dv.RowFilter = String.Format("country", TextBox1.Text)
        GridView1.DataSource = dv
        GridView1.DataBind()

Thanks,

Victor
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LVL 12

Expert Comment

by:jagssidurala
ID: 36582907
0
 

Author Comment

by:vcharles
ID: 36583636
Hi,

I read the section you referred me to, tried modifying my code but it still doesn't work:

 Dim ds As New DataSet
        ds.ReadXml(Server.MapPath("~/App_Data/Country.xml"))
        GridView1.DataSource = ds.Tables(0)
        GridView1.DataBind()
        Dim SearchCriteria As String
        SearchCriteria = " Country IN (" & TextBox1.Text & " )"
        Dim FilteredDT As DataTable
        '  Dim DV As New DataView(ds, SearchCriteria, Nothing, DataViewRowState.CurrentRows)
        GridView1.DataSource = FilteredDT.Select("Country IN (" & TextBox1.Text & " )")
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Author Comment

by:vcharles
ID: 36588549
Help!
0
 
LVL 12

Accepted Solution

by:
jagssidurala earned 500 total points
ID: 36591193
Need to write code like below

GridView1.DataSource= FilteredDT.Select("Country like  '" & TextBox1.Text & "%'").
GridView1.DataBind();

Refer this links

http://social.msdn.microsoft.com/Forums/en-US/vblanguage/thread/2c863ec7-b788-4f7c-b166-3aa66d33a0ba/

http://www.csharp-examples.net/dataview-rowfilter/



0
 

Author Comment

by:vcharles
ID: 36591961
Thanks, for some reason eventhough the code is the the Textboxe's textchanged event, the code doesn't work. Any ideas what I'm doing wrong? I need to filter the data in the grid for every charater the user enters in the textbox.
0
 

Author Closing Comment

by:vcharles
ID: 36711085
Thank You!!
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