Get A Specific (row, Column) Field Value String From A Sql Table?
Nov 21, 2009
I'm a beginner developer using VB 2008 Express Edition and SQL Server 2008 Express. I have tried my simple problem using many different ways and also have searched the web, LINQ to SQL, SQL commands, MSDN library, MSDN Forums, 'How do I' help document, and ... but come up empty. In my simple Table.mdf (see below), I have created some tables (T1, T2, T3, ...) which none is joined together. What I try to do upon request is to get a value string of specific row and column of table?
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Jan 31, 2012
I have a problem deleting specific field in the table. Instead of deleting specific field in the table, the entire row that is selected in the flexgrid is being deleted. please give me idea what code should I add to delete my last row in the flexgrid at the same time delete the data from the database. This is the code i have so far.
Private Sub cmdUnload_Click()
Dim db As Database
Dim sql As String
[Code].....
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May 19, 2010
From within Excel, I want to import data from Access. This is simple enough using Microsoft Query. What is not so simple, at least to me, is how to get the SUM of numbers in a specific field in a specific table in Access. I do not need to import every number in the field only the SUM of the field. I need this 'total figure' to be placed in a cell in an Excel spreadsheet.
The data is listed in the Access table in this order: (there are others but these are the three I am interested in)
TimeStamp, Terminal, TransActionTotal
Simplistically, there are three cells (A2, B2, C2) on on the spreadsheet (one for each terminal). The first should show a total for the day for Terminal 1, the second for Terminal 2 and the third for Terminal 3. Is there a way to get Excel to read the data in the table, add up the appropriate fields by date and then write this total in the appropriate cell? If it makes it any easier, the date is recorded in another cell on the spreadsheet (let's say E1).
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Oct 21, 2011
I need to add a new field to an Access database table, the user has filled the table with data, so I have to add the new field but to preserve the old data.
I have found the ALTER TABLE statement, but it gives me an error (ALTER TABLE is not a valid statement)
I done this in php+mysql with "ALTER TABLE People ADD Address TEXT NULL AFTER Name" (as an example)
How can do this in VB2010?
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Feb 24, 2011
how can i insert record in specific column name..i've used this code it works but how can i insert my record in a specific column name?? here is my code in my btnAddRecord :
If frUpdate = False Then
IsConnected("Insert into products values(" & _
Me.TextBox1.Text & ",'" & _
Me.TextBox2.Text & "','" & _
[code]....
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Oct 15, 2011
I have a gridview loaded with data from my database and a gridview swapping function which after exchanging data between rows with a column call "Priority", I want to save these changes back to my database. Only the "Priority" column value will be change, how do I update only that Column of my dataset table to my SQL database?
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Oct 28, 2011
I'm trying to get the list of field names for a given table, to turn them into a string which I can to post back as a variable to another function.I've Googled loads of stuff regarding GetSchemaTable but all I seem to be able to output are field parameters, but not the actual value of these parameters (ie ColumnName, which is the one I actually want!)
Found this page; What is the SQL command to return the field names of a table?But all the queries on there give me an error "You do not have access to Table 'Columns'"I feel sure this is pretty simple, can someone give me a little function that will simply give me fieldNames = "fieldName1, fieldName2, etc"I am using a MySQL server and ODBC connections ASP.NET using VB.
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Oct 24, 2011
Using VB.NET i want find a specific string that occurs in column B of an Excelsheet and copy that entire row and paste it in a new worksheet. This string occurs a couple of times in this B column.I know how to open up an excel sheet in VB but I'm having difficulties searching for the string and then copying that entire row and do it multiple times (loop until the end of the column)
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Apr 24, 2012
I am using a list<of T> as a data source for a datagridview and would like to handle the draw event of the datagridview to evaluate the string length of the column cell. If larger than a particular number then I would just do something like
cell.value = string.substring(0,(whatever number I need it to be)).
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Apr 17, 2010
How to check if string entered in a text box matches a field in a data table
I have a form with two text boxes for users to enter their Username and Password. When they enter their details and click the 'Login' button I want their details to be
checked against data in a data table to see if they match or not. I am using an 'if...else' statement but can't work out the syntax to use. My code is as follows[code]...Check when string entered in a text box matches field in data table?
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Apr 17, 2010
How to check if string entered in a text box matches a field in a data table.I have a form with two text boxes for users to enter their Username and Password. When they enter their details and click the 'Login' button I want their details to be checked against data in a data table to see if they match or not. I am using an 'if...else' statement but can't work out the syntax to use. My code is as follows:[code]The fields I want to match the textbox strings against in my database table are called 'Username' and 'Password'.
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Jul 14, 2009
Would it be possible to search a table, confining to a specific date range based on a date-time column, and get a count of the 10 most used words in a particular var-char column excluding a list of words?All in SQL?Currently I am pulling out the records that match and sorting through the contents outside of SQL, I would think where I can do it directly on the server it would be more efficient.(SQL 2008)
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Jun 8, 2010
This should be an easy one, looks like I got myself too confused.I get a table from a database, data ranges from varchar to int to Null values. Cheap and dirty way of converting this into a tab-delimited file that I already have is this (shrunken to preserve space, ugliness is kept on par with original):
da.Fill(dt)
' da - DataAdapter '
' dt - DataTable '
[code].....
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Feb 24, 2010
I 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.
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Jul 22, 2010
I 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.
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Mar 23, 2011
I have a program and I get time data from a sqldb and display it in a column in a listbox. What are the proper steps for adding the time as I iterate through the data in the column? I figure I will need to do some conversions on the time to be able to add it and display it as a total.
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Jul 8, 2009
I 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]...
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Feb 23, 2011
I 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).
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Oct 5, 2010
Dim query as String = "Select * from openquery (devbook, 'SELECT wb.arrival_time FROM web_bookings wb ')"All I need is to convert my arrival_time into a datetime field in the query
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May 23, 2012
I have two text files, the first text file has two columns separated by a space (" ") and the second text file only has one column.
The column 1 in text file 1 and text file 2 match albeit in different order, what I'm trying to achieve is for every field in column 1 text file 2 I want to search for column 1 in text file 1 and display the matching column 2 field in column 2 text file 2.
Dim*OpenTextFile*As*String*= IO.Path.Combine("C:Test1.txt")
Dim*OpenTextFile2*As*String*= IO.Path.Combine("C:Test2.txt")
Dim*SaveTextFile*As*String*= IO.Path.Combine("C:Test2.txt")
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Dec 13, 2010
i am a beginner in vb8 i have a text file named alarm.txt,sample alarm.txt file is shown below
can someone help me to read the alarm.txt file and extract data.for eg
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Dec 14, 2011
I have:
- Table1 with columns: PK_ID1, LOCATION, DIRECTOR, SELLER, SELLERID, WORKTIME (relationship), WORKCODE
- Table2 with columns: PK_ID2, WORKCODE (relationship) & WORK_DESCRIPTION
My DataGridView do a SELECT * FROM Table1;How can I replace WORKCODE with WORK_DESCRIPTION in DataGridView, please?
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Mar 24, 2009
I am getting the error "system.argumentException; Column ' test_id2' does not belong to table Table. At System.Data.GetDataColumn( string columnname0 at system.data.datarow.get_item(string columnName).
This error is occuring right after I set the parametervalues in the report object of the Crystal report.(Note this a visual basic.net 2005 windows form application.)
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim cryRpt As New ReportDocument
Dim sql As String
[code]....
The value for the first parameter @Parm_1d1 value to the crystal report version 11 is correct. However, when trying to access the second @Parm_1d2 parameter ,the values past to the crystal report is not correct.
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Oct 23, 2009
I get a Syntax Error with the following code"ALTER TABLE receipts RENAME COLUMN payees TO payee"what I am doing wrong
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Jan 20, 2012
i 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.
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Jun 16, 2011
I am going to make a invoices then.. they are going to have a id it is not going to be identity, it is not my idea, this is the idea's my professor's. then he want it so..he didn't want i change id to int, he want it was varchar..but now i have seen this is as identity.. id =1, next id=2, next=id=3.. but it doesn't mind he told me in the future it is going to be so..
abc000002
abc000003
abc000004
[code]....
then for that he doesn't want i change it to int how can i get the last? i want it one plus next i want it was
abc000010
how can i do it? i am working on visual basic and visual studio 2008i can use a loop-for, or a query for solve it?
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Mar 8, 2010
I 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 ?
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Nov 9, 2010
I am querying a MS Access 2007 database to get a recordset in this manner
SELECT LastService Is Not Null AS [Svc], WeekEnding, CarName
FROM tblService;
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Dec 9, 2010
I need to be able to double-click a row or column in a row to use a field (in this case the Student ID field, the 4th column if counting form 0) to get that row from a database onto a separate form and be able to edit and save it. I have no idea how to make this happen since it is not covered in the class beyond basically displaying database data in DataGridView, I chose to use this functionality in my final project (to be fancy I guess) with the thought that it will be easy to accomplish but am finding it is not quite as easy as I thought. My current code is below;
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Apr 22, 2010
It is not so hard to get the field names from a database via GetOleDbSchemaTable and OleDbSchemaGuid.Columns. It works fine. The field names come i alphabetical order though. I really need them in the correct field no order.
Used code:
connection.Open()
Dim schemaTable As DataTable = _
connection.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, New Object() {Nothing, Nothing, tblname, Nothing})
[Code].....
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