DataTable Field Type From SQLServer Table
Mar 5, 2009If the field type in the SQLServer db is 'nvarchar 10', what would be / is the field type in a DataTable filled by rows from this SQLServer table? String?
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Call SQLServer CLR Storedprocedure From Client Returning A Datatable?
Nov 29, 2010Call SQLServer CLR storedprocedure from vb.net client returning a datatable
View 1 RepliesLoop Datatable And Select Checkboxlist Item Based On The Datatable Field Values
Aug 18, 2011I am trying to display value of the field ("UserID") for every row exists in datatable to checkboxlist(make the checkboxlist item selected).
I used for loop, but only the field value from last row of RoleUsers table is selected in the checkboxlist.
Here is my code
Private Sub DisplayRoleUser()
Dim conn As SqlConnection
Dim cmd As SqlCommand
[Code].....
VS 2008 Select Command - Sqlserver Table ?
Jan 22, 2010Sqlserver Table1 has following data
CODE:
I want to get following result
CODE:
That is grouping on date.
What command should I write to get above result
How To Update SQLServer Database Table Balance Column
Mar 26, 2011I'm maintaining a Table in SQLserver, the Table contains Transaction of Cash In (Debit) and Cash Out (Credit) as follows:
Table Name : "BankLedger"
DATE...DETAILS........DEBIT...CREDIT...BALANCE
1/1/11.Opening Balance.................5000
1/1/11.Rent payment...........2500.....
2/1/11.Mobile Bill.............500.....
3/1/11.Monthly Share...5000............
6/1/11.Emp Salary.............3000.....
Now my requirement is how to update the Balance column respectively same as "Running Total" method???
DATE....DETAILS........DEBIT...CREDIT..BALANCE
1/1/11..Opening Balance................5000
1/1/11..Rent payment...........2500....2500
2/1/11..Mobile Bill.............500....2000
3/1/11..Monthly Share...5000...........7000
6/1/11..Emp Salary.............3000....4000
My application in Visual Basic 2010 and Database SQLserver 2008.
Check If A Field In A Data Table Is Null Before Creating A Textbox Bound To That Field?
Feb 24, 2010I am building a data based application using VB 2008 an SQL Express. I need to create textboxes on my form using code, (With & End With) method. I need a simple code string that will allow the app to check if the field to wich the textbox wil be databound is Nul, If so the textbox will not be created.
View 8 RepliesRename Field Headings And Change The Field Type?
Jun 28, 2010I am trying to edit a dbf table. I would like to be able to rename field headings and change the field type, ie string or dbl, and the size of the field. is this possible to do with vb.net. I have connected to the dbf file but after that am lost on what to do.
View 3 RepliesTransferring Data From One Field In A Table In A Database To Another Field In A Different Table But Same Database In .NET?
Jul 22, 2010I am creating a database in VB.NET for a movie rental place. I currently have three forms;
Member Information
DVD Information
Borrow DVDs
What I would like to do is when I am viewing a member's details, if I click a button 'Borrow DVD for Member', the member's ID number transfers over to the Borrow DVDs table in the Member ID which also would hold some information from the DVD Information table, but I'm sure if i can figure out how to do this firstly, I will be able to apply the same rule and work it out myself.I have been trying to use a query statement like;
INSERT INTO [Borrow DVDs].[Member ID] [IN goodstuffvideos.mdb]
SELECT [Member Information].[Member ID]
FROM [Member Information]
but that has been coming up with error codes and completely not working.
Borrow DVDs table fields are: Borrow ID, Member ID, DVD ID Number, Hiring Fee, Borrowing Limit?
DVD Information table fields are: DVD ID Number, Title, Rating, Hiring Fee, Borrowing Limit Member?
Information table fields are: Member ID, Family Name, Given Name, Address, Town/Suburb, Postcode?
The error coming up is; Error in INSERT statement. Unable to parse query text.And under that it says The query cannot be represented graphically in the Diagram and Criteria Pane.
Conversion From Type 'DBNull' To Type 'Decimal' Is Not Valid When Field Has Data?
Feb 7, 2012I am pulling data from a local MSSQL database using a stored procedure, then send the data to a web service. Every part of the component works well except for a pesky problem will a DBNull being returned from the DataRow field, when I know that the field is not null and has valid data. The database and associated INSERT statements that add to this field are designed to not allow NULL entries. When I debug break the program on or right before the line that throws the error I see that the field has valid data for the current row.If I add a null check to the code (as below) the operation continues as normal:
Dim dataResultsTable = Me.myViewTableAdapter.GetData(int)
For Each myDataRow In dataResultsTable.Rows
If worker.CancellationPending Then
[code]....
Why is the read operation returning DBNull instead of the data in the database?
EDIT: Just to be clear, the operation does return the proper data, but the data is not being saved into the variable.
Display Data Stored In A Sql Sever DB Table, The Table Has A Field With 6 Values?
Jul 8, 2009I currently have this working already for one of my combo box's, but when i try to use the same code i get this error ''There is no row at position 6.'' . The are 2 fields in the table asset_type_id, asset_type_name', im trying to dispaly the values in a combo box for the field 'asset_type_name.
the code for ' Friend Sub RetrieveCustomerInformation2()' works but the other friend sub throws the error.
Imports System.Data.SqlClient
Imports System.Data
Imports System
Imports System.Data.OleDb
[Code]...
SQL Server Query Combination - Get Rows From A Table Based On The Value Of A Field In Another Table
Feb 23, 2011I have a query that I have to run that requires me to get rows from a table based on the value of a field in another table (which I have gotten earlier). I currently have it done like this (simplified).
[Code]...
Conversion From Type 'DataTable' To Type 'String' Is Not Valid
Aug 9, 2011i encounter this error while passing a string as datatable.
I populate combobox1 with tables/sheets from excel and each table has datarows which i want to get the data and import to sql corresponding table, so, I declare
Dim XLSTableName as String = Combobox1.SelectedItem
And I encounter the this error : Conversion from type 'DataTable' to type 'String' is not valid
how do i return the combobox1.SelectedItem as Datatable cos if i declare
Dim XLSTableName as DataTable and pass it to the select Command thus:
Dim objCmdSelect As New OleDbCommand("SELECT * FROM [" & XLSTableName & "], ODBConn)
to obtain the dataRows I got the following error: operator '&' is not defined for types 'String' and System.Data.DataTable'
[2003] Update Unable To Find TableMapping['Table'] Or DataTable 'Table'?
Sep 26, 2008An unhandled exception of type 'System.InvalidOperationException' occurred in system.windows.forms.dllerror in line: dbAdp.Update(dbDset) in btnSave_Click, (elseif editflag = true) blockdescription: Update unable to find TableMapping['Table'] or DataTable 'Table'I was also wondering if I could simply use the ExecuteNonQuery for the delete statement, but since I've placed my data in a datarow, I'm not sure if i can actually use it. Any thoughts on this? Btw, this is my first time using a datarow, and I've recently been studying how to use ADO.net.
dr = dbDset.Tables(0).Rows(CurIndex)
dr.Delete()
dbAdp.Update(dbDset.Tables("addresses"))
[code].....
How To Get Value From Field In DataTable
Mar 15, 2009I am trying to use the value of a field of the last row in a table. I have been trying to use tables().Rows().Item() but somehow it always returns the value of the first row instead of the last one. here is the code:
Dim accion As String
Label1.Text = ""
Label2.Text = ""
Label3.Text = ""
Me.HorasTableAdapter.Fill(Me.ControlDataSet.Horas)
[Code] .....
Calculating Datatable Field?
Mar 15, 2012I'm having some problems calculating the values for two diferent fiels of the datatable. it return " Object reference not set to an instance of an object"this is How I feed the datatable
Dim daProd As New SqlDataAdapter
Dim conProd As New SqlConnection
conProd = Connect()
Dim cmdProd, cmdSave As New SqlCommand
[code]....
C# - Getting Value From Field In DataTable When Column Name Has Spaces?
Mar 8, 2010I have tried:
ObjDTOleDBNFeIntegra.Rows(I)("[Cnpj Cpf]").ToString() //with brackets
ObjDTOleDBNFeIntegra.Rows(I)("'Cnpj Cpf'").ToString() //with apostrophe
ObjDTOleDBNFeIntegra.Rows(I)("Cnpj Cpf").ToString() //without anything
I'm using VB.NET, but comments with apostrophes in here don't seem to be identified.And I get the exceptions for each case:
Column '[Cnpj Cpf]' does not belong to table Table. (fail)
Column 'Cnpj Cpf' does not belong to table Table. (fail)
Column ''Cnpj Cpf'' does not belong to table Table. (fail)
What should I do in order to ger a value from a field in a dataTable when the column name has spaces ?
Have A Field In A Datatable (dt) That Can Be Integer Or NULL?
Mar 1, 2010I have a field in a datatable (dt) that can be integer or NULL.
View 7 RepliesHow To Save Contents Of Field From Row In DataTable
May 27, 2010I have a "For
Each
Row As
System.Data.DataRow
In
DataTable.Rows" type loop. I want to save the contents of a field to use in subsequent processing.
It looks to me like the proper way would be to use something like the following:
Dim saveCatalogWorkID As VariantType
For Each clsWTRow As System.Data.DataRow In clsWTDataTable.Rows
saveCatalogWorkID = clsWTRow.Field("CatalogWorkID")
Next clsWTRow
ASP.Net Error - Unable To Cast Object Of Type 'System.String' To Type 'System.Data.DataTable'
Oct 4, 2009I get the below error Unable to cast object of type 'System.String' to type 'System.Data.DataTable'.This is the code I'm using
Dim str As String = String.Empty
If (Session("Brief") IsNot Nothing) Then
Dim dt As DataTable = Session("Brief")
If (dt.Rows.Count > 0) Then
[code]....
Unable To Cast Object Of Type X To Type X On Setting DataSource To A Table?
Feb 19, 2012Columns 0 & 1 are filled from a DataAdapter from Access Database and three are added. I had this working, but I changed it to check for the column "Feed" so I could add several Locations. At first this worked,but I did someething in perfecting it and it now fails after filling the first row of the datagridview (dgvFdMed).I ran a check and the table LotsTab has 8 rows filled. Column 1 & 2 are strings and the database appears they are fine. The added columns have just been created with no value. My plan is to enter the values and then use the data from the grid.
Private Sub sfillGrid(ByVal Loc As String)
Dim i As Integer
Dim column As DataGridViewColumn
[code]....
Assign Several Field Values In A Datatable Into A Single Text Box?
Jul 9, 2009I have this working for a single field in a text but im trying to add more than one fields data .[code]...
View 7 RepliesVS 2008 Datatable - Select And Filtering Year On A Date Field
Aug 16, 2009I need to use .Select and filtering year on a date field,how can this be done,the next code give me error : the expression contains undefined function call year() vb.net For Each wRwTmp As DataRow In wTblC.Select("year(start_date)=" + wYear.ToString)Next
View 11 RepliesSql Server :: Display In A Bounded Datagridview A Field From Another Table Related To The Bounded Table?
Jan 20, 2012i two tables named tblaccess(nID,nRoleID,nModuleID,cAccess) andtblmodule(nModuleID,cModuleName) and i have a datagrid which is bounded to tblaccess. the problem is, I want to display cModuleName from tblmodule instead of nModuleID. please tell me how.
View 1 RepliesSet Field Value On Value Type Using Reflection?
Mar 23, 2010.NET I want to clone a value type's fields. How can i set a field value on a value type using reflection (or something else dynamically)?
This works for reference types but not for value types. I understand why but I don't know an alternative.
shared function clone(of t)(original as t) as t
dim cloned as t
'if class then execute parameterless constructor
[Code]....
Got A SQL Database With The Field Type Date?
Nov 22, 2010I've got a SQL Database with the field type Date, when i load any data such as 06/04/2010 into my masked textbox it shows as 64/20/10 (without the leading zero's so the date shows wrong.
Also how can I set it to be dd/mm/yyyy and not mm/dd/yyyy?
Insert Value In NChar Type Field In Sql Using?
Jan 13, 2011I am inserting the nChar type value into sql db using the vb.net. Its simple insert query but i dont know why not inserting into db.
[Code]...
Get Sql Type From Datatable?
May 15, 2011I have a data table and when I try to get column type I get this: system.int32
but I want to get the sql datatype like int or smallint.
For Each Field In Mysql Table?
May 8, 2010still having problems with mysql... im trying to find out how i can you a for each statement when getting data from mysql table...i have a table with IP and Port fields in... i want to get each and every one of the ip's and use it...for each ip in heat table and then run my "query()" function how can i do this in vb.net?... i can get ALL ips and ports and put in a gridview but would like to use the ip and display the Game Server Data that my query() function gets...this is from a while back when i made my Game Server Browser and just tryiong to make a better way of keeping my ip and port data and mysql seams to be the best way as its online and it can be added to and edited as and when needed and no one has to "redownload" anything?
View 3 RepliesInsert One Field From A Table Into Another?
Mar 17, 2012Is it possible that i would only want to insert one field from a table into another table?
View 6 RepliesJust Need One Field Per Table Using Databases
Apr 23, 2012I have done plenty of VB programming using flat files etc... Now I am attempting to create a SQL database (I have my sql 2008 express box up and running) I can connect just fine, I made my database, made an account and made it data reader and data writer. I even gave dbowner to my user for testing. I created some tables, and I can access them through the dataset designer in VB 2010. Now what I have been trying to figure out all day.
[Code]...