I 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
[Code]...
In an attempt to learn VB I'm trying to build a database project for a friend's business. This db will be used to track customer information, predominantly for targeted marketing purposes. So far, the development has been slow (I'm still trying to adapt from VBA to VB), but its all starting to make sense now. I'm using two different forms for adding new customers and reviewing the information of existing customers, mainly because the database will grow by about 2,500 customers per year and we wanted to be able to search the records without returning every record when the forms load. Most of this works so far, but I'm having trouble with two issues.
When I open the new customer entry form, I want the form to automatically begin entering data without clicking the "Add New" button. The second problem involves the row ID from the database. It keep showing up as "-1", "-2" etc. The row ID records properly in the table, so no big deal. I have read that this problem is a bug in VB and that its nothing to worry about. However, down the road I will need to access the correct row ID from this same form in order to print out a report for the customer (as needed).
For what its worth here is the code I have so far:
Code:
'Update current record when the form closes
Private Sub frmNewCustomer_FormClosing(ByVal sender As Object, ByVal e As System.Windows.Forms.FormClosingEventArgs) Handles Me.FormClosing
Me.TblCustomersBindingSource.EndEdit()
Me.TblCustomersTableAdapter.Update(Me.dsNewCustomer.tblCustomers)
[Code] .....
I 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 hav a web service which pull records from a database and I am hosting these services in IIS which works fine but I am trying to retrieve the record and display the record in a listbox displaying the time field as the text for that record.I have created the following function
public sub get_data()
dim dt as new data.dataTable
dim service as ws webservice.webservice
[code]...
Please any genius can help me about how to display record in text box.and my database is attached in my project not with sql [code]with this connection how i show data record in text box please every one Student
View 7 RepliesI have a small copy/paste type of program. You put text in the boxes, click copy and it copies it to the clipboard. I have a text file attached to format the text when it is copied. what I want to accomplish is...If I don't fill in every single textbox with text, I don't want that particular field to show when I paste it. Example, I have the layout like below on the text document.
textbox1.
textbox2.
textbox3.
No matter what, when I click copy, the text document is going to copy textbox1,2,and 3. If I only put text in textbox 1 and 3, I don't want it to copy textbox2 if its empty.
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 RepliesMy database : table1
ID FIRSTNAME AGE
1 Sumit 22
2 Sanjeev 23
i have gridview 1 and textbox1 and button1 i want when pages load the gridview displays the all records from table1 and also ...i i wanna search record for firstname by typing sumit in textbox1 and click on button1 then in gridview the record of sumit will be shown ..by default gridview display alll records from table1 How to do this My Selct Query is below : but it doesnot display all record ...but it can display record if you search for a particular record .
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I 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'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
[code]....
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
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 RepliesIm trying to find out what code i would use if i wanted to search all my records in a table for those who are female...but the problem is what kind of place i should store these records initially, Mdf or Mdb? i've tried using dao code (rs.findfirst...but it says theres an error about read only database or something...)
View 8 RepliesWith printing a record in Visual Basic. I have an access 2007 datasource. I'm running VB2008 express.
View 2 RepliesWe are busy with crystal reports, vs 2005. We put a simple table on the report and we want to see on every page a record. How can we force a new page in the report for the record? We don't want to do it in script.
View 1 RepliesI have used a data repeater, some of the data it repeats are URL's taken from the SQL DB. How can these link labels be made into links that will open the clicked URL in a browser?
I know i have to use the
System.Diagnostics.Process.Start("IExplore.exe",
url) command but i dont know how to get the URL from the current record.Is there an easy command to get a field from the current record?
im connect the database using the OLEDB, how to write the code when the user types '02' in textbox1, 'myname' in textbox2 and 'myqty' in textbox3, if database table itemcode field same with textbox1 then will only update the textbox2 and textbox3 in other field, if it does not exist then create the new record.
View 5 RepliesI am trying to do a SQL query to see if an Address already exists in my database. My addresses are structure like this:
line1
line2
line3
city
state
zipcode
country
Sometimes line2 and line3 are NULL values in my database.I am using .NET TableAdapter and DataTable to make my query. When I try to pass in my line2 parameter (@line2) it is equal to a string with value = nothing. My database does not interpret this as NULL and says the records don't match, but I know they do? How do I pass in a string = nothing and have it compare to a NULL value in the database as being equal? I have tried string = DBNULL.value but won't compile.I have done similar comparisons with integers etc. using integer = Nullable (of integer) but this does not exist for strings.
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 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'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 .
I know this sounds simple to the majority of the database gurus out there but I am finding it difficult to find anything related.I am using Visual Studio 2008 VB.net winforms application.I have a form which contains a datagridview. what I want to do by push of a button is set the field "OnHand" either to default or 0. The 'either or' is really for you guys. Which ever one works the best in terms of reducing code or functionality is obviouls prefered.Once the 'OnHand' Fields in every record has changed then I would like to save all the data back to the database'This is more than likely very simple I just cannot find anything that discusses this kind of thing.
View 1 RepliesI'm using an access database in a program that I'm making for my school, the user is able to select an item from the menu, then it sends it to a list box, there is also a textbox to put a quantity of how much of the item you want. I have a field in my database called Amout Ordered, I want to update it with the amount of each item ordered, and I can't figure out how.
View 1 RepliesI have a dataset; I want to create an equivalent record set. What I really want to do is create the XML that a record set can load; I have no other use for the record set per se. I want to be able to load recordsets on other machines (which use VB6 ins of vb.net) with this data. I found some code that loops through the columns in the dataset and creates the fields in the record set; that's executing. However, the code given to open the record set fails with "incompatible or incorrect parameters" or some such. [Code] I can see that a recordset is a construct meant to bridge between running code and a data store of some sort, but in this case the data is "stored" in the dataset, not anywhere else. I want to put that data in the XML form that the recordset uses, so that other code that can only use recordsets (ins of datasets) will be able to read it.
View 2 RepliesI want to know the code used to ADD, SAVE AND DELETE records in VB 2010. eg. I have a fully created DataSet, etc and I have three Buttons.. So to add a new record what code do I put in, same for the other two ( Save, Delete)
I know the code for VB6: Adodc1.Recordset.addnew ......
I just want to add a value from a textbox/variable and save it as a new record in a MS Access Database after a button click.
I've set up the database, set up the tables required.
From what I gather, I need to first link declare 'Imports System.Data' outside all the code. And also define a variable as a connection (Dim con As New OleDb.OleDbConnection) then access the database with "con.ConnectionString = "PROVIDER=Microsoft.Jet.OLEDB.4.0;Data Source = PathName").
What else do I need to include?
I have this code that Deletes a record by its IP address inputted by the user. How do you check if that record is available? how do evaluate first that the IP address inputted is not in the database before deleting anything? in vb 6.0 I used to do this line:If rs.EOF And rs.BF Thenbut it doesn't work anymore in vb 2008
Code:
If TextBox1.Text = "" Then
MsgBox("Input IP Address", MsgBoxStyle.OkOnly, Title:="")
[code]......
I am having a ton of trouble trying to check if a record exists. I continue to get a data mismatch on my command.ExecuteScalar().
Code:
Protected Sub btnRegister_Click(ByVal sender As Object, ByVal e As EventArgs) Handles btnRegister.Click
[code].....