I wrote some code to update the count of a field in a table, but it is very slow. So I'm trying to do it in a subquery to speed things up, but I'm not very good with subqueries. I'm getting the error "Subquery returned more than 1 value".
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I have a RDLC report with a list that contains a table. I require a calculated column whose value depends on values from previous rows. Outside of a report I accomplish the same thing using code in a DataGridView's DataBindingComplete method.
From within a report how do I refer to specific cell values from previous rows? embedded code, but I have not had luck (#Error).
I am linking to an SQL table with 'Money' field. When i try to update this field in VB.NET I get an error message that "Can not convert a character value to money. The char value has incorrect syntax".
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I am working on a 1-page report, that basically consists to select 1 record from table and bind values to proper fields (eg. =Fields!name.Value).However, I have one field in the table that will be just "Y" or "N".When this field will be "Y" I would like to show in the report "Yes, I do."; otherwise I would like to show "No, I dont."
View 1 RepliesHow 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'.
View 2 RepliesI'm trying to insert and update from a table in MSAccess I've declared everything: Connection, DataAdapter and Commands.I didn't use the Command Builder instead I supplied my own Queries.My problem is if I add three rows to my table all the three rows in my database have the same values from the first row. It seems like the parameters are stuck on the values from the first row. [code] I'm using a DataTable with my DataAdapter since I'm dealing with a single table.I'm filling the table with a parametrized query, and updating it with the same dataadapter.I'm adding rows to my datatable and manipulating the table through code. I know that my data is there and every row has it's own values, I can see them when I debug my program.
View 1 RepliesI want to update a date field in my table when a record is updated to reflect when the last update was made. I have this for the parameter: objEXTCommand.Parameters.AddWithValue("@entryDate", Now.Date)
However, this inserts the Date and a time of "12:00:00". I want the date and current system time. I've gone about several ways, but none seem to work. I try this: [Code]
I'm trying to query old Access database tables and compare them with SQL Server tables.They often don't have primary keys, or they have extra fields that had some purpose in the nineties, etc., or the new tables have new fields, etc.I need to find records - based on a set of fields specified at runtime - that are in one table but not another.So, I do this kind of query all the time in SQL, when I'm comparing data in different tables:
dim fields_i_care_about as string = "field1, field2, field3"
'This kind of thing gets set by a caller, can be any number of fields, depends on the
'table
dim s as string= ""
[code]....
It tells me it can't convert a Boolean - Is there any way to do this without Linq expressions? They seem far more complex than what I'm trying to do here, and they take a lot of code, and also I can't seem to find examples of Expressions where we're comparing two fields in a subquery.Is there a simpler way? I know I could do the usual EXISTS query using JOIN or IN - in this case I don't need the query to be super fast or anything. And I don't need to use a DataTable or DataSet - I can put the data in some other kind of object.
I have some reports that I use with the MS ReportViewer and I need to get a count of the physical pages (as opposed to logical page count) to use with a print dialog. I've implemented a workaround so the ReportViewer control displays the correct number of physical pages, but is there a way to get that value from the ReportViewer control? The only publicly accessible property gives the logical page count.
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There are lots of questions about this but I've not been able to solve my problem using the answers to any of them (after many, many attempts..)
I'm working in vb.net creating an asp.net web application. I have an SqlDataSource and a GridView on my page.
I want to change the DoNotMail boolean value represented by a Gridview checkbox and automatically update in the database if the checkbox is checked from 0 (False, Will Mail) to 1 (True, Won't Mail) here is the code I used. [code]...
is it possible to do a two way sync on the entire gridview when the user hits a button so you don't have to do an update every time a row is changed? because the user might check the box and then check another box then uncheck a box and it would be a lot of updates...
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.
View 8 RepliesI 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.
I want to do something like this:
Code:
'create a dataset and a table
Dim ds As New DataSet
[code].....
I know how to display or manipulate (add,delete,update,search) records using the OleDbDataReader and OleDbCommand class. But I'm clueless in getting the total record on a query.
View 1 RepliesI have an multi dimed array of stock sizes, material type and count. The array could have duplicate arrays. In the end I need an array that is condensed with no duplicate and the count field is how many there were in the array.
Example:
Original array
Material: STL TUBG Stock Size: 3" X 3" X 0.250" W/T X 254MM
Material: STL TUBG Stock Size: 3" X 3" X 0.250" W/T X 254MM
Material: STL TUBG Stock Size: 3" X 3" X 0.250" W/T X 254MM
Material: STL TUBG Stock Size: 3" X 3" X 0.250" W/T X 254MM
Material: STL TUBG Stock Size: 3" X 3" X 0.250" W/T X 102MM
Material: STL TUBG Stock Size: 3" X 3" X 0.250" W/T X 102MM
Material: HRS Stock Size: 1" X 4" X 175MM
Material: HRS Stock Size: 1" X 4" X 175MM
Material: HRS Stock Size: 1" X 4" X 175MM
Material: HRS Stock Size: 1" X 4" X 175MM
I need
Material: STL TUBG Stock Size: 3" X 3" X 0.250" W/T X 254MM Count: 4
Material: STL TUBG Stock Size: 3" X 3" X 0.250" W/T X 102MM Count: 2
Material: HRS Stock Size: 1" X 4" X 175MM count: 4
I have been learning visual basic and this is my code I have
Imports System.IO.StreamWriter
Imports System.IO.StreamReader
Public Class Form1
' Form Load
Dim w As IO.StreamWriter
Dim r As IO.StreamReader
[Code] .....
My problem is that I want label1 to count one when the information in Textbox5 is matching a line of info in Listbox1 so far I can do this but when the info changes by me pressing Ctrl+C it works it counts 1 but my problem is my clipboard info is updating automatically I can see the change in the textbox but it wont count.
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
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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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I am having trouble Counting the number of rows in a specific column in a datatable.
View 2 RepliesHow can i declare a simple variable in a form that is the count of the amount of times a field appears in a database.Basically i want to count the amount of times the word "Saloon" appears in a column in my database (access 2007) and then assign that value to a variable.
View 22 RepliesI have a form in whcih users will be able to select the required field that has to be printed.. can u tell me how to add field in CR at runtime ?
View 1 RepliesI am using VB 2005 pro and sql 2005 express.I have a form linked to a sql database. and linked a sql field to a textbox. All I get when the program is running is what is in the database displayed.
But what I would like to do is take a value from a textbox and add that to the chosen field database.
I am a beginner and looking for simple code.
I've placed this on a VB2008 project but it's telling me adNumeric,adVarChar & adBoolean are not declared, I'm assuming I need to "DIM" them, but what as? plus I need each field to accept NULL values, how do I do this? Also I'd like to add a field for accepting images.
Code:
Dim cat As New Catalog()
Dim col1 As New ADOX.Column
Dim col2 As New ADOX.Column
Dim col3 As New ADOX.Column
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This error has me completely baffled. There is no indication (that I ca FinD as to what field won't handle the information. Heres the situation:I am using an Accees query to insert a new record in a table with 49 fields. Of these fields, 1 is an integer, 7 are booleans and the other 41 are text fields. The text fields represent either Time of Day or a Timespan.
My field sizes are:
For time of day 8 digits(example 08:00 AM)
For a time span 5 digits(example 03:30) I will never exceed 2 digits for
hours
I have checked every field in the dtatbase and they are all as noted. I am at a loss as to how to proceed.
I have an open database (dataset) with two tables. It is binded to toolboxes, but I have one field, what I have to calculate about other parameters. I have binding navigator, and I can set field values from controls (eg. toolbox). I can step my rows, with binding navigator. I can update my database. But how can I set field value from code?
I want a code line:
database.fields("fieldname") = something - or something like this
Rather than running numerous queries in Access I am trying to write a front end for a DB2 database. The Access database is getting to a size that it is causing Access 2007 to have reliability issues and frequent compacting is required. I have created the Dataset, the Table Adaptors, and the Connection String already, but when I put in a bit of code in to fill the Table Adaptors the remote connection I have to work is going crazy (chewed up about 180MB before I realised it was pulling data from work).
Before I started the project I copied the .accdb to my local PC HDD and I pointed the connection string to it, but it still looks like it is trying to pull data from the work network. If it was a small database I wouldnt be concerned but it is pulling major data every time I run it. I have only 2 out of the 4 Table Adaptors running and it didnt fill them even after 10 minutes.
Here is the code I was trying to run... Server name has been substituted for Server for obvious work reasons.
Because the tables are so large I was looking for a way to pull only the columns I need to from the tables, I tried adding .SOFT_ID to the first line of code but the TA spat the dummy message below...
Value of type 'System.Data.DataColumn' cannot be converted to Application_Name.DS_DB2Database.Server_SOFTDataTable'.
Code:
Me.TA_ServerSOFT.Fill(Me.DS_DB2Database.ServerSOFT.SOFT_ID)
Me.TA_ServerSOFT_FOUND.Fill(Me.DS_DB2Database.ServerSOFT_FOUND)
Me.TA_ServerHARD.Fill(Me.DS_DB2Database.ServerHARD)
Me.TA_ServerREF_SUP.Fill(Me.DS_DB2Database.ServerREF_SUP)
I would also like to pull just the data columns I need to speed up the query.
Note: In case youre wondering why I am not connecting directly to the DB2 database. I currently dont know where it is stored and while leveraging Access I am trying to put a level of separation between the app and the db for the time being, later I will try connect directly.
I am using Visual studio 2008 to build a web application. What I am trying to do is retrieve data from a database and populate text boxes based on the results.
View 4 RepliesI am using VB 2008 and SQL Server 2005. I have a texbox in which I need to show the field 'domain' from the table x. I am getting the field in the format needed from a stored procedure.Below is the Vb code that I am using in which I am getting an error message: Invalid attempt to read when no data is present.at this line sDomain = sDomain & " " & v_DR!Search
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I've got a database with the fields: tuneName, Artist, Sales and yearIssued I'm trying the load up just the first field (tuneName) into a list box. I've managed to load the database into VB but I dont know the code to do this specific thing.Also I want to be able to select one of the items in the list box and the rest of the fields to appear in text boxes on the form.
View 2 RepliesI have a database and I wanna select a field ..I usually do this with access:
dim chosen as string
chosen = textbox1.text
Dim querysql = "select * from table where field = " & chosen & ""
But with SQL it doesnt work =S I really need to make this work .