In a DataTable/DataSet is there a way to search 1 particular row?

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  • Start date Start date
G

Guest

Hello all, I have a problem I was hoping someone could help me out with. Ok,
in my Sql Server Database I'm searching through a table for a particular
value that a user enters(e.g. nameid ). The problem is there are several
nameid's in 1 row of data that I have to search and it's possible for that
nameid to be located in more than 1 place in the table. In my listview what
I'm trying to do is have it where, if a user clicks on row the program will
search that row for that nameid and pull back the necessary picture. Note:
the data in my listview contains all the rows where that nameid is located.
The reason why I had to bring back the other nameid' is because there are
columns such nameid1, nameid2, and so on. In my code, I've been able to
indicate the column id that he user double-click on but I can't cycle
through each column to find the nameid without the code going through the
first row. For example, If two records are returned and I double-click on the
second my code goes through the first row first due to a 'For Each' loop that
I'm using for the datarow. I hope I haven't made this too cofusing. Here is
some of the code:

'place the index of the choosen row into this variable
Dim choosenRow As String =
lvResult.SelectedItems(0).Text.ToString()
'variable to hold the current index as we
'loop through each row
Dim tempString As String

Do Until iCounter = mDataTable.Rows.Count

tempString = mDataTable.Rows(iCounter)("plineupid").ToString()
CompareResult = String.Compare(choosenRow, tempString)

If (CompareResult = 0) Then
For Each myDataRow In mDataSet.Tables("plineup").Rows()
For iLoop = 0 To myDataRow.Table.Columns.Count() - 1

If myDataRow.Item(iLoop) = txtSysid.Text Then

Dim imageStream As System.IO.FileStream

imageStream = New System.IO.FileStream
(configClass.frmMDirectory & _
"\" & myDataRow.Item(iLoop) & "." &
myDataRow.Item(iLoop + 1), System.IO.FileMode.Open, _
System.IO.FileAccess.Read)
'set the image for the picturebox to reduce or
to expand
'to fit the size of the Picturebox.
imgName.SizeMode = PictureBoxSizeMode.StretchImage
imgName.Image =
System.Drawing.Image.FromStream(imageStream)
Exit For
End If
Next
'Next
Exit Do
End If

iCounter += 1 'increment iCounter variable
Loop

Please help....
 
Terrance,

There are three methods in Adonet to find records and they all create a
collection of datarows or a single datarow.

Only two will in my idea fit your problem those are

Datatable.select 'static filter
http://msdn.microsoft.com/library/d.../frlrfsystemdatadatatableclassselecttopic.asp

Dataview.rowfilter 'the fastest and a dynamic filter
http://msdn.microsoft.com/library/d...rlrfSystemDataDataViewClassRowFilterTopic.asp

After that you have to loop through the collection of course.

The third is the datarow.find however just for one row with the primary key.

I hope this helps,

Cor
 
doh.............

The dataview does not create directly a datarow collection however you can
loop throug it using the datarowview,

Sorry

Cor
 
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