Is "dataset.table.rows.find()" Func. Supports Sql Date Type Primary Key
Jul 18, 2012
i'm trying to do some appointment book so i decided to use MonthCalendar control and date changed event for choose the date i tried dataset.table.rows.find() function on other tables which have int primary key and it works its finds my row/s i need but when i tried this func. on date type primary key it cannot find i tried to search with date type ==> fail search with string type like 03.07.2012 ==> failed etc.
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Jan 26, 2010
[Code]...
I know how to do the code shown in ClassA and ChildClassB, but how do I go about coding the example in GrandChildClassC, which needs to not do the stuff that ChildClassB does in this function, but still do what Class does.
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Aug 9, 2011
I am trying to append multiple rows in a SQL Server.I have connected to the MS SQL Server and with a DataAdapter, I have downloaded the Table into a DataTable and displayed it in DataGridView.I now want to programatically enter multiple rows into the DataTable and later to update the SQL Table.
I am trying to build an application to do this generically.The problem I have is that the Table and DataTable has an 'ID' Field. In the SQL DB, i is an Auto-incrementing field.When the code loops through creating new rows and entering field values, how do I handle the ID Field that is the Primary Key?
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May 31, 2010
I pass it a valid dataset that has the department name and the Department id as a number..20, 40, 30..... I want to get the department number.. I pass it HR(which is in the ds.table) but I am getting an error on the rows.find() "Input string was not in a correct format" it is a string.. what else could i be doing wrong here...
Public Function GetDeptID(ByRef ds As DataSet, ByVal strDepartment As String) As Integer
'Dim dr As DataRow
' Check to see if date is already in the table
[code].....
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Sep 10, 2009
I am trying to retrieve row data from a table in a dataset (dataset name is PatientsDataSet and table name is tblfacilitiesnames).
I am using VB 2008 but the code I entered is from a VB2005 sample so something must have changed in the format.
I am already connected to the database since it opens the connection when the program is run.
Here is the code:
Dim Counter As Integer
Dim Str1 As String
Dim FacRow As PatientsDataSet.tblFacilitiesNamesRow
[Code]....
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Jul 19, 2010
I have created a strongly typed dataset in the VS 2005 Dataset Designer. There are two tables that relates to each other in a one to many relationship: Claim and ClaimDetail. The designer automatically creates a function GetClaimDetailRows which returns all ClaimDetailRows for a ClaimRow. Why is this Array's length always 0? Because ClaimDetail contains more than 40 Million rows, i did'nt fill it before i call GetClaimDetailRows but had configured it's selectcommand that it takes a parameter idData to fill only the related records. But that seems not to work because the ClaimDetail-Datatable is empty.
The automatically generated function in the ClaimRow-Class which returns all related ClaimDetailRows:
Public Function GetClaimDetailRows() As ClaimDetailRow()
If (Me.Table.ChildRelations("Claim_ClaimDetail") Is Nothing) Then
Return New ClaimDetailRow(-1) {}
Else
Return CType(MyBase.GetChildRows(Me.Table.ChildRelations("Claim_ClaimDetail")),ClaimDetailRow())
End If
End Function
When debugging I see that it jumps into the else block but returns 0 rows. Do I have to fill the Claimdetail-Datatable first(ClearBeforeFill=True) for each Claim? But then I don't need to use this function anymore. I now fill the Datatable(ClearBeforeFill=True)before i call the Child-function and it works. But I don't understand why it could not throw an exception(optionally) when I try to acess a child-relation without having that datatable being filled(at least with 0 rows). Instead of that it returns 0 rows what can be correct or incorrect and is difficult to detect.
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Sep 1, 2009
I have a table in a databases that contains 12 rows. I am loading a runtime dataset with that table. The result are displayed on 2 different controls. The first one is a DataRepeater and the second one is a DataGridView. The DataGridView displays all 12 rows just fine.
The DataRepeater does not. Some of the 12 rows will be blank and some will have the data. Sometimes I won't see any data until I completely cycle the scroll bar to the end and then back and still some of the 12 rows will be blank.
[Code]...
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Apr 8, 2010
MsgBox(MyDataSet.mytable.Rows.Count)
Gives 0, why?
The table has data!
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Feb 11, 2011
I have a word document with multiple tables. How can I specify in VB.NET to find a specific table and insert rows only into that one? I've successfully implemented the Find&Replace in the document... but the problem is that I have an unknown number of things that must be added into the table based on the data I'm querying from my database. So there is no simple solution as far as putting placeholders in the table and using the find and replace function.
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Apr 2, 2009
How to find record on a table using dataset?
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May 10, 2011
The Project: We have ten athletes and the user defines the time they did. Those times are saved in a table called times(10). Clicking a button calculates the minimum time, the maximum and the average time. Also it finds the place of (i) in the table and sends it to a TextBox. The Problem: What if we have 2 same minimum times, for example (10 sec and 10 sec) or 2 maximum timThe
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim max As Double
[code].....
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Dec 9, 2010
I've create a new VS 2008 Window Form Project using VB. I added an oleDbDataAdapter to the first and only form, set it to a table in my Access 2007 Database (there is only one table, PK field autonum of course and two Memo fields). The Database is in the Project's folder. A standard oleDb Connection object was created, as I expected, then I select the DataAdapter and choose 'Generate Dataset' which produces a standard DataSet called 'DataSet1.xsd'. Now when I build the project I get an error 'Error 1 Type 'FontTest.DataSet1' is not defined.' I do have a reference in my new Project to System.Data.So what the @#%$@ is going on? Why isn't the Dataset create by the DataAdapter being recongized? I can get into the DataSet Designer. The DataTable create is perfect, three columns defined correctly as I expected.
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Nov 9, 2011
how to delete rows of data without using the primary key VB.netI am using Access 2003 & VB 2005
Private Sub BtnDel_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles BtnDel.Click
Dim dt As New DataTable
[code]......
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May 5, 2012
I use a dbDataAdapter to populate a DataTable from an unlinked oracle database.I have a dbDataAdapter that I want to insert rows into an SQL Server table using SQLCommandBuilder.I have been trying all day to update the DataTable that references the SQL Server table with the data from the Oracle DataTable so that I can insert the rows.
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Nov 24, 2010
I have a list of properties and values that i'd like to use to dynamically build an Expression(Of Func(Of MyClass,MyClass))
I can run through the list and create each Expression by itself, but the only way I know how to combine them would be to use Expression.And or Expression.AndAlso, but that returns a BinaryExpression rather than my original Expression(Of Func(Of MyClass,MyClass)).
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Apr 21, 2010
I have some VB.net code that inserts data into my SQL database using a typed dataset as follows:
dim usersTa As New authorizedUsersTableAdapters.Authorized_UsersTableAdapter
usersTa.Connection = New Data.SqlClient.SqlConnection(MY_CONNECTION_STRING)
usersTa.Insert(first_name, last_name)
[code]......
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Jan 4, 2011
I have a problem saving a dataset which contains rows that i have imported from another dataset. i can successfully view the imported rows in a gridview but i cannot commit the rows back to the database.
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Jan 18, 2012
I am currently using DevExpress 10.2 within Visual Studio 2010. In a previous question I was trying to print the current user view of a DevExpress GridControl with the user's choice of expanded or collapsed master rows and/or group sections. I was told this was not possible at this time. I have now decided to use the following code:
[Code]...
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Aug 18, 2011
I have Dataset ds filled up with values Until now I was displaying values in GridView. Now I want that all the rows should be columns and columns should be rows.I have 2 options: Either 1 I can directly convert grid to columns and display it, or 2 I can convert the GridView to html and then write loops to convert. I was trying the 2nd option but I cant figure out how I should do that.[code]With this code I am still getting same as GridView. Please help me for converting rows to columns and vice versa.
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Aug 27, 2010
I'm trying to compare two images to see if bmpComp exists in bmpSrc. At this point in the code, the first pixel of bmpComp matches the first pixel of bmpSrc at (intx, inty).[code]...
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Jul 27, 2010
when populating a data grid i keep getting a redundant row in the bottom. is there a way to lock grid rows to the number of rows in the data table?
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Feb 28, 2009
i'm unable to debug my project that i made. i save it and everything, but it just won't playit says Warning 1 Could not find type 'WindowsApplication1.My.Resources.Resources, Time table'. Please make sure that the assembly that contains this type is referenced. If this type is a part of your development project, make sure that the project has been successfully built. C:SchoolIPTTime table, using 2 loopsTime table, using 2 loopsForm1.Designer.vb 123 0 now when i open it up and try to debug it , it comes up with an error, i even try referencing it but it does nothing ,
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May 8, 2012
After days of labouring, debugging and researching, im on the 3rd to last line and im stuck. This isnt the full code, but the relevant parts.
Dim dbProvider As String
Dim dbSource As String
Dim con As New OleDb.OleDbConnection
[Code].....
I understand this means my table doesnt have a primary key, but i have set one.
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Oct 24, 2009
I would like to have some explaination about the characteristics of a primary key in the table of such database. This is for vb 2008 express edition,since im new to this language,if this is true, as far as i understand about the characteristic in setting the primary key on each field for true.My question is if you are doing an updates/edit records in your table using the DataContext,if you setup the primary key for true of one of your field in the table it would edit all records in one datarow but if you put the primary key for true in all fields except one of them,all the records in the data column of that field which primary key is false could be edited.Basically its impossible to edit all records in the datarow and all the records in the datacolumn of the table in such one event. Is there any further explaination about the characteristics of primary key in the table?
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Aug 3, 2009
I have an access database with 4 tables and two of the tables have absolutely no need for a unique field that would be a primary key. One will only have one record and the other is a detail table for two master tables. I of course get an error like "UpdateCommand is not supported against a SelectCommand that does not return any key column information." when I try to save. Do I have to just create a primary field key I don't need or is there a work around for this?
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Jul 19, 2011
I'm trying the fetch only the date within the current and return how many rows Dim dc as new dataclassesdatacontext dim q=from p in dc.worktime where p.name.equals(session("name") and p.date ).count what I should I put after "p.date" ? And if I want to search for the record which there are record that are insert five days earlier, how to do that ? use (datetime.now - 5) ?
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Mar 17, 2011
[Code]....
It is returning all the columns by id. I need only the primary key. When I add the following line it is empty: WHERE SIK.indid = 1 Why is that? Is there other ways to do the same thing and working? Since I am in the rush
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Jun 10, 2011
I'm having some problems trying to input records into a relational database. The design is really simple but I'm running into a wall when it comes to having the foreign key from my child table autopopulate the primary key from the parent table. I've made the connections in Access and from what I understood, so long as I committed a transaction, the child table would populate the primary key from the parent table. This is not happening.
my question is: is there a method that would do what I'm looking for? or am I cornered into using @@IDENTITY and manually inserting the primary key into the child table?
I've tried using datasets and data adapters and created a datarelation within the dataset, but it is still not doing what I need. everything I've tried thus far has allowed me to insert records into multiple tables, but won't relate them because of the missing primary key in the child table.
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Jun 8, 2011
So I have a program that I am converting to .NET FW 3.5 and I am getting the titled exception on the following line:If IsNothing(dsTopPI.Rows.Find(profile.Item("GEMSID"))) Then Continue For
which is in a for each loop. The thing is, I have set the primary key and when I put in the following code:Dim columns() = DSTop30Profiles1.DTtop30profiles.PrimaryKey Console.WriteLine("Column count: " & columns.Length.ToString)For a = 0 To columns.GetUpperBound(0)Console.WriteLine(columns(a).ColumnName & " - " & columns(a).DataType.ToString)Next
I get this in the output:Column count: 1 GEMSID - System.Int32
That would seem to indicate that there is in fact a primary key, right?
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Aug 23, 2010
Storage Unit application, 5 buildings, 107 Units split between the 5 buildings.frmBuildings is a form with:(from the botton up) 1 TLP 5 columns 2 rows5 Group Boxes, 1 per column, Group Box 1 & 2 each have a TLP with 2 columns & 3 rows. 107 buttons on the form that represent each building.The idea is that I want to change the BackColor of any button that represents an Available unit. This is a multi tier applaicationData Access Layer query function:
' Method name: getStorageUnitsAvailable
' Purpose: to return a Data Table from data base
' Parameters: none
[code].....
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