Strongly Typed Datatables (out Of Resultsets)
Feb 18, 2008
I dragged two tables into the dataset designer. And I have a query with a resultset over both of the tables (joined).
Is there ANY way I can have a strongly typed datatable out of the resultset?
The automatically created dataset adapters won't allow me to create a tableadapter or datatable for the joined resultset but for one single table at a time only.
Any solution to that? Theoretically it should be possible since I don't "lose" any type information with a join.. why can't I have a strongly typed datatable over the resultset?
The join is not very sophisticated. In fact it couldn't be any more simple.
(I'm refering to my previously posted question at http://forums.asp.net/t/1220481.aspx)
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Nov 23, 2004
I have a strongly-typed that I fill w/in my app, then use the dataset to insert rows into a SQL table.
3 fields look like this:
RegHrs - decimal
OTHrs - decimal
TotHrs - decimal
When I insert the fields using parameters, the params look like this:
paramValues(10) = New SqlParameter("@RegHrs", SqlDbType.Decimal)
paramValues(11) = New SqlParameter("@OTHrs", SqlDbType.Decimal)
paramValues(12) = New SqlParameter("@TotHrs", SqlDbType.Decimal)
The fields in the SQL table are defined as:
RegHrs - decimal (9,2)
OTHrs - decimal (9,2)
TotHrs - decimal (9,2)
Before I insert the row (from w/in the VB code), I stop the code and verify that the values being placed into the params are:
5.85
0
5.85
After the SQL insertion, the values w/in the SQL Table contain:
6
0
6
What am I missing?????
Thanx
JerryK
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Feb 2, 2015
I'm looking to serialize some NVP data into an XML blob. I plan to put a primary xml index on the column, but my question is, would putting an XSD on the column speed up any queries, or would it just ensure format? I know that with selective xml indices, you can do things like specify the datatype associated with the xpath which can further optimize retrieval.
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Mar 22, 2007
Like the subject says, I'm using strongly typed datasets. I'm using to designer to create the datasets and the methods. I can select and insert, but I can't update or delete. I right click on the adapter bar and select Add Query. I sleect 'Use SQL Statements'I select 'Update' (or 'Delete')I get a sql statement pane containing the word 'Update' ('Delete') and asking 'What data should the table load?'I can click on next, but anything else gives me errors. I'd list them, but I'm clearly doing something wrong and it's probably obvious. Diane
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Feb 27, 2008
I get the error above when I do the following.
Using VS 2008 I got a Windows Smart Device project targeting WM6 Standard and using .NET CF 3.5.
I add a new database file = creating an empty Compact 3.5 database (creates an sdf-file in my project).
Then create an empty dataset in the wizard (creates an xsd-file in my project).
Then I add a couple of tables in the database.
After that I want to use my earlier created dataset.
I mark the xsd-file and looks in Poperties.
I get the error when I try to change Custom Tool value from 'MSDataSetGenerator' to 'MSResultSetGenerator'.
Why????
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Mar 5, 2007
I'm using strongly typed datasets in my first ASP.NET 2.0 web application. I come from ASP Classic, not an earlier version of .NET, and feel like I'm in another world. I'm slowly getting my head around datasets, but one thing I can't find any information on is how to read the data in a single record?I'm not talking about for next loops, or accessing row information as a repeater or other control is filled. I'm talking about reading the data returned by a method that returns a table containing a single record. This is what I have: Dim BookAdapter As New BooksTableAdapters.BooksBBTableAdapter Dim organizations As Books.BooksBBDataTable Dim organization As Books.BooksBBRow organizations = BookAdapter.GetDataByOneBook(sBookID) Dim sDropOff As String Dim sOrganization As String Dim sContact For Each organization In organizations If organization.DropOff = 1 Then sDropOff = "True" Else sDropOff = "False" End If sOrganization = organization.Organization sContact = organization.ContactName Next sBody = "Books Listing" & Chr(10) & Chr(10) sBody = sBody & "Organization: " & sOrganization & Chr(10) sBody = sBody & "Contact Name: " & sContact & Chr(10) sBody = sBody & "Email: " & organization.Email & Chr(10) sBody = sBody & "Phone Number: " & organization.Phone & Chr(10) I'm using the FOR NEXT, but this is silly since I only have one record. GetDataByOneBook(sBookID) does exactly what is says, it returns a single book with a specific bookID.Not only is this silly, it doesn't work. Using sContact as an example, it's Dim'd as a string. In the FOR NEXT loop, organization.ContactName has the right value, and it appears to be assigned to sContact correctly, but when I try to use sContact in sBody, I get an error saying that sContact has been used before it is assigned a value. Maybe the variables lose their scope outside the loop? Maybe I could get around this by building sBody inside the loop, but there has to be a better way! Diane
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Mar 20, 2008
Hi,
I have a Excel file as data source. On sheet 1 there are some header information. On sheet 2 are a quiet simple data table. Both sheets will be read into memory with SSIS.
Now i want to combine some header information with the data table.
Sheet 1:
Unit A, 3/20/2008, Group 1
Sheet 2:
34‚¬, 56‚¬, 12‚¬
43‚¬, 43‚¬, 12‚¬
32‚¬, 42‚¬, 13‚¬
...
This should be result:
34‚¬, 56‚¬, 12‚¬, Unit A, 3/20/2008, Group1
43‚¬, 43‚¬, 12‚¬, Unit A, 3/20/2008, Group1
32‚¬, 42‚¬, 13‚¬, Unit A, 3/20/2008, Group1
...
How can I do this?
Regards
Johannes.W
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Jan 12, 2007
VS05
How are dates removed / nullified?
I have a SQL datetime field that is being editted via a datatable / adapter - The table structure defines the datetime as a date.
From here I want to remove the date - i.e. write DBNull back to the database. Setting the Date to Nothing or .minvalue results in a min date exception and DBNull cannot be cast to the datetime either.
R
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Oct 24, 2007
I am still confounded with how to create a VIEW involving multiple DATATABLES in a DATASET. Could someone point out a MSDN page where I can see this working and how I go about doing this? Let me re-iterate - I want to create a VIEW that uses JOIN type statements that involves multiple DATATABLES in my loaded DATASET.
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Mar 21, 2007
Good Day:
I have a business object with a set of public DataTables and Public Strongly Typed Dataset DataTable Types defined. When I add the business object class to the report as a datasource, only public System datatypes (int, string) show up. I added System.Data to the report properties Assemblies, with no change. Any ideas?
Thanks,
Omar
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Feb 1, 2008
Hi, I am new to Crystal Reports. I have a dataset with three datatables that are related. How can I do a subquery on these tables and display its result on my Crystal report ?
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May 25, 2006
The test sub below operates on a SQL Server Table with an xml-type field ("xml"). The purpose of the sub is to learn about storing and retrieving a whole xml document as a single field in a SQL Server table row.When the code saves to the xml field, it somehow automagically strips the xml.document.declaration (<?xml...>). So when it reads the xml field back and tries to create an xmldocument from it, it halts at the xmldocument.load.I order to get the save/retrieve from the xmlfield to work, I add the <?xml declaration to the string when I read it back in from the xml field (this is in the code below).At that point the quickwatch on the string I'm attempting to load into the xmldocument is this:-----------------------------------------------------<?xml version="1.0" encoding="utf-16" ?><Control type="TypeA"><Value1><SubVal1A>Units</SubVal1A><SubVal1Btype="TypeA">Type</SubVal1B></Value1><Value2><SubVal2A>Over</SubVal2A><SubVal2B>Load</SubVal2B></Value2></Control>-----------------------------------------------------The original xml document string is this:-----------------------------------------------------<?xml version="1.0" encoding="utf-16" ?><Control type="TypeA"> <Value1> <SubVal1A>Units</SubVal1A> <SubVal1B type="TypeA">Type</SubVal1B> </Value1> <Value2> <SubVal2A>Over</SubVal2A> <SubVal2B>Load</SubVal2B> </Value2></Control>-----------------------------------------------------which seems to have all the same characters as the quickwatch result above, but clearly is formatted differently because of the indenting.THE FIRST QUESTION: Is there a simpler way to do this whole thing using more appropriate methods that don't require adding the xml.document.declaration back in after reading the .xml field, or don't require using the memorystream to convert the .xml field in order to load it back to the XML document.THE SECOND QUESTION: Why does the original document open in the browser with "utf-16", but when I write the second document back to disk with "utf-16" it won't open...I have to change it to "utf-8" to open the second document in the browser.Here's the test sub'============================================ Public Sub XMLDSTest() '=========================================== Dim ColumnType As String = "XML" '=========================================== '----------Set up dataset, datatable, xmldocument Dim wrkDS As New DSet1() Dim wrkTable As New DSet1.Table1DataTable Dim wrkAdapter As New DSet1TableAdapters.Table1TableAdapter Dim wrkXDoc As New XmlDocument wrkXDoc.Load(SitePath & "App_XML" & "XMLFile.xml") Dim str1 = wrkXDoc.OuterXml Dim wrkRow As DSet1.Table1Row wrkRow = wrkTable.NewRow '=======WRITE to SQL Server============== '------ build new row With wrkRow Dim wrkG As Guid = System.Guid.NewGuid TestKey = wrkG.ToString .RecordKey = TestKey .xml = wrkXDoc.OuterXml '<<< maps to SQL Server xml-type field End With '----- add row to table and update to disk wrkTable.Rows.Add(wrkRow) wrkAdapter.Update(wrkTable) wrkTable.AcceptChanges() '----- clear table wrkTable.Clear() '=======READ From SQL Server ============== '----refill table, read row, wrkAdapter.FillBy(wrkTable, TestKey) Dim wrkRow2 As DSet1.Table1Row = _ wrkTable.Select("RecordKey = '" & TestKey & "'")(0) '===== WRITE TO New .xml FILE =========================== Dim wrkS1 As New StringBuilder Select Case ColumnType Case "XML" '---if xml build xml declaration: '---add this to xml from sql table => <?xml version="1.0" encoding="utf-16" ?> wrkS1.Append("<?xml version=" & Chr(34) & "1.0" & Chr(34)) wrkS1.Append(" encoding=" & Chr(34) & "utf-16" & Chr(34) & " ?>") wrkS1.Append(wrkRow2.xml) End Select Dim wrkBytes As Byte() = (New UnicodeEncoding).GetBytes(wrkS1.ToString) Dim wrkXDoc2 As New XmlDocument Dim wrkStream As New MemoryStream(wrkBytes) wrkXDoc2.Load(wrkStream) '=========================================== '---- this just shows that the file actually was touched Dim wrkN2 As XmlNode = wrkXDoc2.CreateNode(XmlNodeType.Text, "ss", "TestNode2") wrkN2 = wrkXDoc2.SelectSingleNode("//Value1/SubVal1B") wrkN2.Attributes("type").Value = "This was from the xml field" '---------------- '------ update the encoding....otherwise the file won't open in the browser with utf-16 Dim wrkN1 As XmlNode = wrkXDoc2.CreateNode(XmlNodeType.Element, "ss", "TestNode") wrkN1 = wrkXDoc2.FirstChild wrkN1.InnerText = Replace(wrkN1.InnerText, "utf-16", "utf-8") '------------Now write the file back as an .xml file Dim wrkFilePath As String = SitePath & "App_XML" & "XMLFile2.xml" Dim wrkXW As XmlWriter = XmlWriter.Create(wrkFilePath) wrkXDoc2.WriteContentTo(wrkXW) wrkXW.Close() End Sub===============================
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Nov 8, 2003
Hi,
How can i return multiple resultsets from SQLServer. For ex, if we pass EmpNo to my storedprocedure it should return his salary details(from Sal table) and Attendance details(attendance table).
Ramesh
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Aug 29, 2006
Hi
I want to compare values of two fields in same resultset. Like I have resultset whrre there are two fields Frequency and New_Frequency I want to compare this two like if
Frequency = New_Frequency then do some logic.
I tried with derived columun using Frequency == New_NewFrequency but it doesn't work.
Let me know is there any way to compare?
Dnyandeo
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May 25, 2005
Is there a problem mapping variables to resultsets with a bigint as datatype?
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Jan 11, 2007
I have create stored procedure that returns 2 resultsets. When I configure OLE DB Source to use this procedure I can not add second output for he source. I get following error:
TITLE: Microsoft Visual Studio
------------------------------
Error at Data Flow Task [OLE DB Source [1]]: An output cannot be added to the outputs collection.
------------------------------
ADDITIONAL INFORMATION:
Exception from HRESULT: 0xC020800F (Microsoft.SqlServer.DTSPipelineWrap)
------------------------------
BUTTONS:
OK
------------------------------
How to add second output?
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Feb 18, 2003
Hi there,
I'd need to generate multiple recordsets within a MS SQL stored procedure. The thing is these recordsets depend on each previous one (the first one obviously has parameters). How can I make this work? I can't create views with SPs. Thank you very, very much.
Martin
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Oct 19, 2005
Hi!I want to return a derived table along with 4 simple tables in a storedprocedure as follows:Input parameter: @FtNum (==Order Number, selects one Order and allassociated data)Table 1: OrdersTable 2: ItemsTable 3: InstancesTable 4: StockDetailsDerived Table: for each Item that requires stock items, 1st columnshould receive the ItemNo (from Items), subsequent columns should receive thedetails from StockDetails via the common key field 'StockCode'.I have so far used a 'Fetch' cursor to find all occurrences of a StockCodewithin the Items table, but have been unable to figure out how to first addthe ItemNo into the temporary table.Code is as follows:... build #tmp_StockDECLARE stock_cursor CURSOR FORSELECT StockCode, ItemNoFROM ItemsWHERE FtNum = @FtNumORDER BY ItemNoOPEN stock_cursorFETCH NEXT FROM stock_cursorINTO @StockCode, @ItemNoWHILE @@FETCH_STATUS = 0BEGININSERT INTO #tmp_Stock-- wish to insert ItemNo = @ItemNo here --SELECT *FROM ControlledStockWHERE StockCode = @StockCodeFETCH NEXT FROM stock_cursorINTO @Stockcode, @ItemNoENDOf course there may be a much simpler way to do this!Your help would be greatly appreciated either way.--Message posted via SQLMonster.comhttp://www.sqlmonster.com/Uwe/Forum...eneral/200510/1
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Jan 30, 2008
I'm writing a Windows application (Visual Studio 2005, c#) utilizing a local SQLExpress database. It consists of about 10 tables and I've created about 15 Stored Procedures to address various functions... I can run the update Stored Procedures interactively within the designer and the data tables update as designed. However, if I run the update Stored Procedures from within my windows application is where they fail. I get no error messages, if I return a rowcount variable from the Stored Procedure it tells me that one row was updated (SELECT @RtnVal == @@rowcount)... but when I open the subject table in the designer, there is no new data.
My update queries address both insert and update functions, so if it is new row of data, it performs the insert action, otherwise it updates an existing row.
I can query the data using my stored procedures to load default values into my windows form, I can search and find client records to display in the form... I just can't update records. I'm of the opinion that it is a rights issue, but I can't find any resources that address user access accounts with SQLExpress and windows apps. The current connection string for my local database is set for Integrated Security = true; User Instance = true
I've tried two approaches... one utilizes my stored procedure....
bool bSave;
SqlConnection conn = new SqlConnection(KadaDesk.Properties.Settings.Default.dbKadaConnectionString.ToString());
SqlCommand cmd = new SqlCommand("SavAuthTesterData", conn);
cmd.CommandType = CommandType.StoredProcedure;
cmd.Parameters.Add("@CtrId", SqlDbType.NVarChar, 20).Value = TestCenterID.ToString();
cmd.Parameters.Add("@AT_Id", SqlDbType.NVarChar, 15).Value = GnuAuthTesterId.ToString();
cmd.Parameters.Add("@AT_Name", SqlDbType.NVarChar, 50).Value = GnuAuthTesterName.ToString();
cmd.Parameters.Add("@AT_Pwd", SqlDbType.NVarChar, 15).Value = GnuAuthTesterPwd.ToString();
cmd.Parameters.Add("@Maint", SqlDbType.NChar, 1).Value = GnuAuthTesterStatus.ToString();
cmd.Parameters.Add("@ModBy", SqlDbType.NVarChar, 15).Value = sAuthTester.ToString();
try
{
conn.Open();
cmd.ExecuteNonQuery();
bSave = true;
}
Then I tried a direct insert...
SqlConnection conn = new SqlConnection(KadaDesk.Properties.Settings.Default.dbKadaConnectionString.ToString());
SqlCommand cmd = new SqlCommand();
SqlTransaction myTrans;
conn.Open();
cmd.Connection = conn;
myTrans = conn.BeginTransaction();
cmd.Transaction = myTrans;
string disDte = DateTime.Now.ToShortDateString();
try
{
string sCmdText = "INSERT INTO Tester (CenterId, AuthTesterId, AuthTesterName, AuthTesterPwd, "
+ "CreateDte, Maint, ModBy) "
+ "VALUES ('" + TestCenterID.ToString() + "','"
+ GnuAuthTesterId.ToString() + "','"
+ GnuAuthTesterName.ToString() + "','"
+ GnuAuthTesterPwd.ToString() + "','"
+ disDte.ToString() + "','"
+ GnuAuthTesterStatus.ToString() + "','"
+ sAuthTester.ToString() + "')";
cmd.CommandText = sCmdText;
cmd.ExecuteNonQuery();
myTrans.Commit();
bSave = true;
}
Both fail... which points to the only common point in both approaches, the connection string and user rights... but I can't find any place to address user accounts or configurations for windows apps.
Thanks for whatever help you can offer...
Jim-
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Mar 11, 2008
I have read a lot in favor and recommendation of returning multiple resultsets.
But now I have to implement it with a scenario.
I have a Parent Table named "Books" and a Child one named "Volumes".
A book can have multiple volumes.
Now I want to display the list of Books with their Volumes pagewise.
How can I implement that procdure.
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Aug 11, 2004
Hi!
I have a question about SQL Reporting Services. I have a stored procedure which returns multiple resultsets (multiple select). In my reporting services project I have a dataset that connects to this procedure. But, when I execute it in the Data tab, I only get the first resultset. So can't I have more resultsets?
I can't use more datasets (that have the selects in the procedure) because the procedure is complicated and has many calculation. I've managed to get all the selects in only one and the reporting services in working in this way. How about many resultsets in a dataset?
Thank you!
Irina Stanca
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Apr 20, 2015
I have on stored procedure which returns mote than one resultset i want that to store in two different temp table how can achieve this in SQL server.
Following is the stored procedure and table that i need to create.
create procedure GetData as begin select * from Empselect * from DeptendÂ
create table #tmp1 (Ddeptid int, deptname varchar(500),Location varchar(100))
Insert into #tmp1 (Ddeptid , deptname ,Location )
exec GetData
create table #tmp (empid int , ename varchar(500),DeptId int , salary int)
Insert into #tmp (empId,ename,deptId,salary)
exec GetData
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Jun 27, 2007
I have a SELECT query with an alias in it.
The intellisense shows all field except the alias one.
What goes wrong?
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May 18, 2007
Is it possible to return typed data in an Endpoint for an ASP.Net Web Reference to Proxy? If so, is there any specific terminology I should be aware of to target my search?
I realize there is a choice between Object (returns a dataset or error) or dataset, but the automatically generated WebReference Proxy in ASP.Net (2.0) is untyped and we can't change the typing there as you have to remove the entire WebReference to pick up new WebMethods (or changes to signitures I'd assume).
I'm able to create my own typed proxy as a psuedo-DAL assembly which takes the WebReference and cast rows/objects into typed rows/objects one at a time, but this seems like a lot of work and probobly not the best practice.
Any help would be greatly appreciated
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Aug 2, 2007
I have a DAL that uses Typed DataSets (not directly, the DAL references and calls the dataset methods) and I am receiving a "There is already an open DataReader associated with this Command which must be closed first." error when I render an ASP.NET page where two imgs need to retrieve two different versions of an image (a thumbnail and a full sized image).I am using SQL Server 2005, ASP.NET 2.0, and my connection string includes the MARS attribute set to true. This is the method in the SqlServer DAL, _images is a typed table adapter:public override Image SelectImage(Guid? id) { // TODO: Find out why MARS feature isn't working! DataSet.ImageDataTable dt = _images.SelectImageById(id); <-- Exception occurs here if ((dt != null) && dt.Count == 1) { DataSet.ImageRow row = dt[0]; Guid? keyId = null; if (!row.IsKeyIdNull()) { keyId = row.KeyId; } // Success return new Image(row.Id, keyId, row.Path, row.Caption); } return null; } // This is the method that is called for both images, which calls the DALpublic class EntitySearch{ public static Image ImageById(Guid id) { return _dal.SelectImage(id); }}// These are the code-behind methods that the image response strings will come from...imgThumbnail.ImageUrl = String.Format("../Services/ImageBroker.aspx?img={0}&mode=Thumbnail", image.Id);imgFullImage.ImageUrl = String.Format("../Services/ImageBroker.aspx?img={0}&mode=Image", image.Id); // And finally here is the code in the broker class that saves the images to the response streamImage image = EntitySearch.ImageById(imageId);using (Picture picture = (mode == ImageMode.Image) ? image.Picture : image.Thumbnail){ Picture.Save(response.OutputStream, ImageFormat.Jpeg);}So the final snippet of code is being called twice, and it crashes. I have tried closing the connection and reopening it as a workaround but this only yields strange results, though it intermittently does load the images.Can anyone spot the issue?
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Aug 21, 2007
Hi,
Is there any work around to passing a set of strings to a parameter in a Typed Dataset for example I am pasing '4226222172004','4212012182004' which I build on my code the number of items will vary passed on the user selection but since the Typed Dataset uses sp_executesql and the parameters are change to '''4226222172004'',''4212012182004'''
Any ideas how I can format the Parameter I am passing.so that it will end like where in ( '4226222172004','4212012182004') instead of where in ('''4226222172004'',''4212012182004''') I again the number of parameters will very.
Thanks
Julio D
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Feb 14, 2008
I am using typed data sets. When a certain line of C# code is reached, I get the following error message:
Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints.
Here is my source code. I altered the table to remove all contraints and primary keys, but I still get the error message. The erroroccurs when the last line of code is reached. (_DeltaTable = myAdaptor.GetData();) The code is listed below. Does anyone know whatis going on?
calculateValuesAndAveragesTableAdapters.FundamentalsTableAdapter myAdaptor = new calculateValuesAndAveragesTableAdapters.FundamentalsTableAdapter();
calculateValuesAndAverages.FundamentalsDataTable _DeltaTable; _DeltaTable = myAdaptor.GetData(); // Error occurs on this line
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Sep 11, 2006
Hi, I am trying to use a typed dataset created using the Query builder which returns the data correctly when I use 'Execute Query' in query builder but as soon as I attempt to return a dataset using the GetData method created I get the following error: Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints. Which is not very helpful, any ideas where the problem may be? I have tried switching off enforce constraints and setting the NullValue property of all strings to 'Emtpy' bu that has no effect. Thanks in advance
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Apr 8, 2006
Hello,I'm using a typed dataset to access my database (SQL Express); I have a table that returns data, which two fields are null; I'm getting this error:{"Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign-key constraints."}There are no foreign-key or unique key constraints, so it has to be a non-null issue; I changed the two fields in the table to have a null value of Empty instead of Throw Exception, but I don't understand what the problem is coming from... I'm at a loss.Thanks.
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Dec 24, 2006
Hi!
I'm need to use typed Dataset with CLR UDT, but when I'm trying to create TableAdapter in Dataset designer, I'm gettng error message: User-defined data types are not supported in DataSet designer
Is any way to get it working?
My UDT defined in separate assembly as:
[Serializable]
[XmlRoot(Namespace = NS)]
[StructLayout(LayoutKind.Sequential)]
[SqlUserDefinedType(Format.Native, Name = DataType, IsByteOrdered = true, ValidationMethodName = "Validate")]
public struct Coordinate
: INullable,
IXmlSerializable
{
.....
}
Working environment: Visual Studio 2005 SP1, MS SQL 2005 SP1 + Hotfix.
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Mar 14, 2007
I would like to extact data from a source system even if it has errors. Then I can transform it and handle the errors in the appropriate manner. Are there any loosely-typed Data Flow Destinations?
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Dec 11, 2006
Hi all,I am using a Strongly Typed DataSet (ASP.NET 2.0) to insert new data into a SQL Server 2000 database, types of some fields in db are nvarchar. All thing work fine except I can not insert unicode data(Vietnamese language) into db.I can't find where to put prefix N. Please help me!!!
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Dec 26, 2007
Hi,
I have a little question. I searched google, and could not find good answer for this one.
I have a stored procedure that returns two tables. Usually I generate a dataset out of a stored procedure by dragging it to the dataset.
When I drag this one it creates a DS with only one table, the first one. How can I make it use both tables?
Thank you.
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