I'm a newbie so don't laugh :#
I'm working with 2002-2003 Microsoft access database.
Now, I want to add an array of DataRow into an existing table that I've in my database. Is there a way to do that? because right now I'm just adding the rows with a foreach loop
thank you
I think that the foreach-loop actually is the best way to do it.
foreach(DataRow row in yourRowArray)
{
dataTable.Add(row);
}
If you are using .Net Framework 3.5+ you can also use the DataRows CopyToDataTable() Method.
But you have to watch out because the Data in the DataTable is overwritten in this case.
DataTable table = yourDataTable;
DataRow[] yourRowArray = ...;
if(yourRowArray.Length > 0)
{
table = yourRowArray.CopyToDataTable();
}
I would recommend using the foreach-loop.
What you describe as array must be a saved file type i.e. excel or csv. Be sure it is a clean grid of data without extraneous non aligned rows.
Then you can link to that file with Access as a table. This is a manual step using the Access interface - in the ribbon it is the External area. This link remains good - allowing you to replace the excel/csv with a new one as long as the location path and structure of the file do not change.
Then you create an Append query to write all the records from this table into the table in your Access database.
www.CahabaData.com
Related
According to the Peoplebook here, CreateRowset function has the parameters {FIELD.fieldname, RECORD.recname} which is used to specify the related display record.
I had tried to use it like the following (just for example):
&rs1 = CreateRowset(Record.User, Field.UserId, Record.UserName);
&rs1.Fill();
For &k = 1 To &rs1.ActiveRowCount
MessageBox(0, "", 999999, 99999, &rs1(&k).UserName.Name.Value);
End-for;
(Record.User contains only UserId(key), Password.
Record.UserName contains UserId(key), Name.)
I cannot get the Value of UserName.Name, do I misunderstand the usage of this parameter?
Fill is the problem. From the doco:
Note: Fill reads only the primary database record. It does not read
any related records, nor any subordinate rowset records.
Having said that, it is the only way I know to bulk-populate a standalone rowset from the database, so I can't easily see a use for the field in the rowset.
Simplest solution is just to create a view, but that gets old very soon if you have to do it a lot. Alternative is to just loop through the rowset yourself loading the related fields. Something like:
For &k = 1 To &rs1.ActiveRowCount
&rs1(&k).UserName.UserId.value = &rs1(&k).User.UserId.value;
&rs1(&k).UserName.SelectByKey();
End-for;
I have been trying to create indexing using below set of lines.
KeyspaceDefinition fromCluster = cluster.describeKeyspace(KEYSPACE);
ColumnFamilyDefinition cfDef = fromCluster.getCfDefs().get(0);
BasicColumnFamilyDefinition columnFamilyDefinition = newBasicColumnFamilyDefinition(cfDef);
BasicColumnDefinition columnDefinition = new BasicColumnDefinition();
columnDefinition.setName(StringSerializer.get().toByteBuffer("A_NO"));
columnDefinition.setIndexName("A_NO_idx");
columnDefinition.setIndexType(ColumnIndexType.KEYS);
columnDefinition.setValidationClass(ComparatorType.UTF8TYPE.getClassName());
columnFamilyDefinition.addColumnDefinition(columnDefinition);
But i am unable to do so. Actually i am storing the data in the columns dynamically as well as creating those columns dynamically and after that for better query purpose i am trying to put index on some particular columns. Any suggestion please how to do that.
Its eventually quite simple. You just have to create the secondary index while defining your columnfamily. In the above code, all the manipulation are done on the object index which has to be created while defining only. The steps for adding index are
List<ColumnDef> columns = new ArrayList<ColumnDef>();
columns.add(newIndexedColumnDef("columnName", "UTF8Type"));
List<ColumnDefinition> columnMetadata = ThriftColumnDef
.fromThriftList(columns);
cdefs.add(cf_def); //cf_def is your columnfamily definition
The helper method code is from KeyspaceCreationTest
public ColumnDef newIndexedColumnDef(String column_name, String comparer){
ColumnDef cd = new ColumnDef(se.toByteBuffer(column_name), comparer);
cd.setIndex_name(column_name);
cd.setIndex_type(IndexType.KEYS);
return cd;
}
References for comparer can be found here
I hope it will help you.
I have an excel 2007 file (OpenXML format) with a connection to an xml file. This connection generates an excel table and pivot charts.
I am trying to find a way with OpenXML SDK v2 to do the same as the "Refresh All" button in Excel. So that I could automatically update my file as soon as a new xml file is provided.
Thank you.
Well there is quite good workaround for this.
Using OpenXML you can turn on "refresh data when opening the file" option in pivot table (right click on pivot table->PivotTable Options->Data tab).
This result in auto refresh pivot table when user first opens spreadsheet.
The code:
using (var document = SpreadsheetDocument.Open(newFilePath, true))
{
var uriPartDictionary = BuildUriPartDictionary(document);
PivotTableCacheDefinitionPart pivotTableCacheDefinitionPart1 = (PivotTableCacheDefinitionPart)uriPartDictionary["/xl/pivotCache/pivotCacheDefinition1.xml"];
PivotCacheDefinition pivotCacheDefinition1 = pivotTableCacheDefinitionPart1.PivotCacheDefinition;
pivotCacheDefinition1.RefreshOnLoad = true;
}
you need to determine "path" to yours pivotCacheDefinition - use OpenXML SDK 2.0 Productivity Tool to look for it.
BuildUriPartDictionary is a standard method generated by OpenXML SDK 2.0 Productivity Tool
protected Dictionary<String, OpenXmlPart> BuildUriPartDictionary(SpreadsheetDocument document)
{
var uriPartDictionary = new Dictionary<String, OpenXmlPart>();
var queue = new Queue<OpenXmlPartContainer>();
queue.Enqueue(document);
while (queue.Count > 0)
{
foreach (var part in queue.Dequeue().Parts.Where(part => !uriPartDictionary.Keys.Contains(part.OpenXmlPart.Uri.ToString())))
{
uriPartDictionary.Add(part.OpenXmlPart.Uri.ToString(), part.OpenXmlPart);
queue.Enqueue(part.OpenXmlPart);
}
}
return uriPartDictionary;
}
Another solution is to convert your spreadsheet to macroenabled, embed there a VBA script that will refresh all pivot tables.
This can happen on button click or again when user opens spreadsheet.
Here you can find VBA code to refresh pivot tables:
http://www.ozgrid.com/VBA/pivot-table-refresh.htm
You can't do this with Open XML. Open XML allows you to work with the data stored in the file and change the data and formulas and definitions and such. It doesn't actually do any calculations.
Excel automation technically would work, but it's absolutely not recommended for a server environment and is best avoided on the desktop if at all possible.
I think the only way you can do this is following this type of method..
Save Open XML workbook back to a xlsx file.
Load the workbook using the Excel object model.
Call either
ThisWorkbook.PivotCaches(yourIndex).Refresh();
or
ThisWorkbook.RefreshAll();
although I was pretty sure RefreshAll would also work.
Use the object model to Save the workbook and close it.
Reopen for use with xml namespaces.
The solution provided by Bartosz Strutyński will only work if the workbook does contain pivot tables and they share the same cache. If the workbook does not contain pivot tables, the code will throw a NullPointerException. If the workbook contains pivot tables that use different caches (which is the case when data sources are different), only one group of pivot tables that use the same cache will be refreshed. Below is the code based on Bartosz Strutyński's code, free of the aforementioned limitation, and not relying on knowing the "path" of PivotCacheDefinition object. The code also inlines BuildUriPartDictionary, which allows avoiding enumeration of uriPartDictionary in case it’s not used somewhere else, and uses explicit types, to ease searching documentation for the used classes.
Dictionary<String, OpenXmlPart> uriPartDictionary = new Dictionary<String, OpenXmlPart>();
Queue<OpenXmlPartContainer> queue = new Queue<OpenXmlPartContainer>();
queue.Enqueue(document);
while (queue.Count > 0)
{
foreach (IdPartPair part in queue.Dequeue().Parts.Where(part => !uriPartDictionary.Keys.Contains(part.OpenXmlPart.Uri.ToString())))
{
uriPartDictionary.Add(part.OpenXmlPart.Uri.ToString(), part.OpenXmlPart);
queue.Enqueue(part.OpenXmlPart);
PivotTableCacheDefinitionPart pivotTableCacheDefinitionPart;
if ((pivotTableCacheDefinitionPart = part.OpenXmlPart as PivotTableCacheDefinitionPart) != null)
{
pivotTableCacheDefinitionPart.PivotCacheDefinition.RefreshOnLoad = true;
}
}
}
I'm trying to generate a new SharePoint list item directly using SQL server. What's stopping me is damn tp_DirName column. I have no ideas how to create this value.
Just for instance, I have selected all tasks from AllUserData, and there are possible values for the column: 'MySite/Lists/Task', 'Lists/Task' and even 'MySite/Lists/List2'.
MySite is the FullUrl value from Webs table. I can obtain it. But what about 'Lists/Task' and '/Lists/List2'? Where they are stored?
If try to avoid SQL context, I can formulate it the following way: what is the object, that has such attribute as '/Lists/List2'? Where can I set it up in GUI?
Just a FYI. It is VERY not supported to try and write directly to SharePoint's SQL Tables. You should really try and write something that utilizes the SharePoint Object Model. Writing to the SharePoint database directly mean Microsoft will not support the environment.
I've discovered, that [AllDocs] table, in contrast to its title, contains information about "directories", that can be used to generate tp_DirName. At least, I've found "List2" and "Task" entries in [AllDocs].[tp_Leaf] column.
So the solution looks like this -- concatenate the following 2 components to get tp_DirName:
[Webs].[FullUrl] for the web, containing list, containing item.
[AllDocs].[tp_Leaf] for the list, containing item.
Concatenate the following 2 components to get tp_Leaf for an item:
(Item count in the list) + 1
'_.000'
Regards,
Well, my previous answer was not very useful, though it had a key to the magic. Now I have a really useful one.
Whatever they said, M$ is very liberal to the MOSS DB hackers. At least they provide the following documents:
http://msdn.microsoft.com/en-us/library/dd304112(PROT.13).aspx
http://msdn.microsoft.com/en-us/library/dd358577(v=PROT.13).aspx
Read? Then, you know that all folders are listed in the [AllDocs] table with '1' in the 'Type' column.
Now, let's look at 'tp_RootFolder' column in AllLists. It looks like a folder id, doesn't it? So, just SELECT the single row from the [AllDocs], where Id = tp_RootFolder and Type = 1. Then, concatenate DirName + LeafName, and you will know, what the 'tp_DirName' value for a newly generated item in the list should be. That looks like a solid rock solution.
Now about tp_LeafName for the new items. Before, I wrote that the answer is (Item count in the list) + 1 + '_.000', that corresponds to the following query:
DECLARE #itemscount int;
SELECT #itemscount = COUNT(*) FROM [dbo].[AllUserData] WHERE [tp_ListId] = '...my list id...';
INSERT INTO [AllUserData] (tp_LeafName, ...) VALUES(CAST(#itemscount + 1 AS NVARCHAR(255)) + '_.000', ...)
Thus, I have to say I'm not sure that it works always. For items - yes, but for docs... I'll inquire into the question. Leave a comment if you want to read a report.
Hehe, there is a stored procedure named proc_AddListItem. I was almost right. MS people do the same, but instead of (count + 1) they use just... tp_ID :)
Anyway, now I know THE SINGLE RIGHT answer: I have to call proc_AddListItem.
UPDATE: Don't forget to present the data from the [AllUserData] table as a new item in [AllDocs] (just insert id and leafname, see how SP does it itself).
I asked on SO a few days ago what was the simplest quickest way to build a wrapper around a recently completed database. I took the advice and used sqlmetal to build linq classes around my database design.
Now I am having two problems. One, I don't know LINQ. And, two, I have been shocked to realize how hard it is to learn. I have a book on LINQ (Linq In Action by Manning) and it has helped some but at the end of the day it is going to take me a couple of weeks to get traction and I need to make some progress on my project today.
So, I am looking for some help getting started.
Click HERE To see my simple database schema.
Click HERE to see the vb class that was generated for the schema.
My needs are simple. I have a console app. The main table is the SupplyModel table. Most of the other tables are child tables of the SupplyModel table.
I want to iterate through each of Supply Model records. I want to grab the data for a supply model and then DoStuff with the data. And I also need to iterate through the child records, for each supply model, for example the NumberedInventories and DoStuff with that as well.
I need help doing this in VB rather than C# if possible. I am not looking for the whole solution...if you can supply a couple of code-snippets to get me on my way that would be great.
Thanks for your help.
EDIT
For the record I have already written the following code...
Dim _dataContext As DataContext = New DataContext(ConnectionStrings("SupplyModelDB").ConnectionString)
Dim SMs As Table(Of Data.SupplyModels) = _dataContext.GetTable(Of Data.SupplyModels)()
Dim query = From sm In SMs Where sm.SupplyModelID = 1 Select sm
This code is working...I have a query object and I can use ObjectDumper to enumerate and dump the data...but I still can't figure it out...because ObjectDumper uses reflection and other language constructs I don't get. It DOES enumerate both the parent and child data just like I want (when level=2).
PLEASE HELP...I'M stuck. Help!
Seth
in C# it would be:
var result = from s in _dataContent.SupplyModels where s.SupplyModelID==1 select s;
foreach(SupplyModel item in result)
{
// do stuff
foreach(SupplyModelChild child in item.SupplyModelChilds)
{
//do more stuff on the child
}
}
and a VB.NET version (from the Telerik code converter)
Dim result As var = From s In _dataContent.SupplyModels _
Where s.SupplyModelID = 1 _
Select s
For Each item As SupplyModel In result
' do stuff
'do more stuff on the child
For Each child As SupplyModelChild In item.SupplyModelChilds
Next
Next