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How to filter Dataset in Vb.Net

Posted on 2014-12-26
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Last Modified: 2014-12-28
My actual dataset - tempDS populates more than one datatable.

I need to filter the dataset for the DataTable : tree_categories

Sample query

select * from tree_categories where GROUP_CODE <> PA.43.948'

DataTable : tree_Categories

Column Name : GROUP_CODE


Dim tempDs As DataSet = ds
Dim dtTable As DataTable = tempDs.Tables("p_tree_categories")


How to filter a Dataset in Vb.Net ?
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Question by:chokka
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9 Comments
 
LVL 3

Assisted Solution

by:Ali HND
Ali HND earned 250 total points
ID: 40519347
Hi
Dim tempDs As DataSet = ds
Dim dtTable As DataTable = tempDs.Tables("p_tree_categories")
Dim result() As DataRow = dtTable.Select("GROUP_CODE <> 'PA.43.948'")
For Each row As DataRow In result
	    Console.WriteLine(row(0))
Next

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Author Comment

by:chokka
ID: 40519348
@a_hnd , thank you !! I am returning the dataset in my function.

I am expecting the tempDS to be populated with filtered row of records and return in the function.

Is it possible to achieve in this syntax ??
0
 

Author Comment

by:chokka
ID: 40519358
actual method


Public Function LoadBaseTree(ByVal ds As DataSet) As Boolean

Dim result As Boolean = False

Dim tempDs As DataSet = ds

 

If BaseTreeLoaded = False Then

If ShowProductNotInElement = True Then
'implement function to append product not in element

tempDs = mergeTables(ds)


End If

result = MyBase.ApplySelectionCriteriaData(tempDs, Me.Name, GroupTableName, ItemTableName, GroupItemTableName, MyBase.ValidatorItemTableName, MyBase.ValidatorItemDataTableName, True, True, True, True)

If result = True Then
_baseTreeLoaded = True

End If

Else
ClearSelections()

result = True

End If
Return result
End Function

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LVL 36

Accepted Solution

by:
Miguel Oz earned 250 total points
ID: 40519361
The below code fills the temp dataset with the filtered info:
'create new dataset
Dim tempDs As DataSet = New DataSet()
'Use the merge method to add filtered table
tempDs.Merge(ds.Tables("p_tree_categories").Select( "GROUP_CODE <> 'PA.43.948'"))

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LVL 3

Expert Comment

by:Ali HND
ID: 40519371
'Your Codes
'.
'.
'.
Dim result() As DataRow = dtTable.Select("GROUP_CODE <> 'PA.43.948'")
Dim FunctionResualt As Boolean = False
If result IsNot Nothing Then
    FunctionResualt = True
Else
    FunctionResualt = False
End If
Return FunctionResualt
End Function

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Author Comment

by:chokka
ID: 40519747
When i write the merge syntax

tempDs.Merge(ds.Tables("p_tree_categories").Select( "GROUP_CODE <> 'PA.43.948'"))


My original ds has 23 tables.

On writing merge, i am able to get only p_tree_categories table. I am not  able to include remaining 22 tables.

In my req, i need to get all the tables in the Dataset. Along with filtered - p_tree_categories
0
 

Author Comment

by:chokka
ID: 40519772
tempDs.Merge(ds.Tables("p_tree_categories").Select( "GROUP_CODE <> 'PA.43.948'"))

tempDs.Merge(ds,True)

After writing the syntax,i am able to get the remaining 22 tables. Values populating the duplicate value of records.
0
 

Author Comment

by:chokka
ID: 40520085
I am merging all my ds.Tables to my test Dataset.

Issue is : testDs.Merge(ds.Tables("p_tree_data"))  - p_tree_data doesnt have row of records. When there is no row of records, table has to be merged with Dataset. Right now, when there is no row of records, table is not get merged. How to fix this issue
 

  Dim testDs As DataSet = New DataSet()

        testDs.Merge(ds.Tables("p_pay_cmp_cursor"))
        testDs.Merge(ds.Tables("p_pay_cmp_pln_cursor"))
        testDs.Merge(ds.Tables("p_currency_cursor"))
        testDs.Merge(ds.Tables("p_tree_categories").Select("SCR_DPY_SEQ <> '20116000'"))
        testDs.Merge(ds.Tables("p_tree_data"))
        testDs.Merge(ds.Tables("p_prod_override_cursor"))
        testDs.Merge(ds.Tables("p_tree_val_item"))
        testDs.Merge(ds.Tables("p_tree_val_item_data"))
        testDs.Merge(ds.Tables("p_bonus_cat_cursor"))
        testDs.Merge(ds.Tables("p_bonus_item_cursor"))
        testDs.Merge(ds.Tables("p_managed_results"))
        testDs.Merge(ds.Tables("p_tree_group_categories"))
        testDs.Merge(ds.Tables("p_component_type_cursor"))
        testDs.Merge(ds.Tables("p_ref_data_cursor"))
        testDs.Merge(ds.Tables("p_meas_typ_cursor"))
        testDs.Merge(ds.Tables("p_measurement_period_cursor"))
        testDs.Merge(ds.Tables("p_cap_typ_cursor"))
        testDs.Merge(ds.Tables("p_pay_calc_mth_cursor"))
        testDs.Merge(ds.Tables("p_calc_typ_cursor"))
        testDs.Merge(ds.Tables("p_pay_freq_cursor"))
        testDs.Merge(ds.Tables("p_payout_typ_cursor"))
        testDs.Merge(ds.Tables("p_perf_source_cursor"))
        testDs.Merge(ds.Tables("p_custom_type_cursor"))

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Author Closing Comment

by:chokka
ID: 40520815
I am using merge syntax. Thank you Miguel.
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