VS 2008 Populating Textbox With Decimal From An Access Database?
Jul 7, 2010
I have a field in an access database with decimals in it. I am using ADO to read in the data and are trying to assign it to a textbox in a form. This works fine when its a whole number. But it doesnt seem to work when its a decimal for some reason.
I have declared the variable i have assigned the access field to as a double, but when i set up a test textbox which i point the variable at and times it by 1000, it doesnt work. Works perfectly when i change the access field entry to a whole number though.
This sounds like im not using the right syntax or something.
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May 7, 2010
I have a database that has tables in it. Tables can be added to this databse programatically as well as the data that needs to be in those tables.I need to be able to query that database to get what tables are in it, place the names of those tables into a listbox so that when a user clicks on the name of the table, It will update a DataGridview with the data that is in that table in the database.I assume that you would need to build a dataset at runtime based off of what tables are in the DB, but i have no idea how to do this.
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Jun 28, 2008
I am trying to insert a variable in Decimal type into an Access table. When I use "decimal" field with 0 digits after the decimal separator (,) my program works properly. However, when i use the field with 2 digits after the separator I get a "Data type mismatch in criteria expression." exception. This happens also when I try to update the table. The debugger shows me that my variables contain the right values but the update or insert command gives the error.
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Apr 1, 2010
i am relatively new to VB and i am working on a Visual Basic Program to build a Student Record Book where all the information is stored to an Access 2007 database. If the user is an administrator they will be able to add a new student, update delete etc. I managed to implement INSERT/DELETE/UPDATE functions and also a search button and they all appear to be working fine.
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Mar 12, 2010
I have a few drop down lists that I'd like to populate from a table in an SQL database. I tried setting it in the DataBindings section of Properties but I guess that doesn't work.
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Nov 14, 2009
if this question has already been answered many times, but I am new to VB and I don't really understand any of the examples I have found by trying to research this topic. I am using VB 2008 Express Edition. My List View is called listView.
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Sep 12, 2011
In a textbox on my form, I have a value that loads in it that is something like "10.38 - 12.33"
I want it to where the textbox will display whole numbers only. So it will show "10 - 12"
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Dec 21, 2010
1) One Decimal Varibale stores a decimal value
2) The value must be converted in string ( some time the comma is used as decimalplaceholder some time the dot)
3) the user modifies the value
4) i need to riconvert the string back in decimal
how can i do this
so:
Variable 123.34D ----> textBox 123,34 or 123.34 -----> variable 123.34D
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Jun 3, 2010
I found a function that validates the numberic and decimal input for a textbox and works exactly like I want. But it does not let me limit how many numbers after the decimal. how to do this in the same function?
[Code]...
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Dec 10, 2010
I read a decimal datum from my database and ask the debugger what I got:?
reader.Item(idxItem)
0D {Decimal}
Decimal: 0DI want to convert it to a string because I am building an output record.? CSTR(reader.Item(idxItem))
"0.0000"I don't want four decimal places so I try to be more specific:? STRING.format(reader.Item(idxItem), "0.00")
"0.0000" {String}
String: "0.0000"How do I get 0.00? And if my input is 90.5, I want 90.50.
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Dec 22, 2010
I have a TextBox in a Windows Forms application in VB 2008 (.NET 3.5) where a user can key an estimate amount. I am allowing them to key dollars and cents, and I want to round to the nearest dollar. The original code had the rounding down when the data was written back to a table, and that worked fine - I have this code in a "Save" routine that fires when the user moves to a different screen or record:
Dim est As Decimal : Decimal.TryParse(txtEstimateAmount.Text.Trim, est)
Dim estimatedAmount As Integer = Math.Round(est)
I decided that it might be nice to actually do the rounding as soon as they leave the field instead, so they're not surprised when they reload the screen and find that 1822.60 is now 1823. So I took the exact same code and added it to the TextBox.Leave event handler. And the weirdest thing happened: instead of the variable est being populated with 1822.60 after the parse, it gets set to -1! What the...?
Debugging the handler shows that the value goes into the parser correctly, and if I do the parsing manually via the Immediate window, it parses correctly, but when I let the code do it, it invariably gets set to -1. What's even weirder is that any number gets parsed as -1, not just decimals, and any non-number gets parsed as 0 (which is correct).
Has anybody else ever run into this before? I tried moving the code to the TextBox.LostFocus event instead, but with the same results. I have no idea what in the heck is going on, and obviously there are workarounds galore for this, but it just makes no sense whatsoever.
EDIT: Here's the full event handler (current behavior for which is to put -1 in the TextBox):
Private Sub txtEstimateAmount_Leave(ByVal sender As Object, ByVal e As System.EventArgs) Handles txtEstimateAmount.Leave
' Take any dollars-and-cents amount and round to the nearest dollar
Dim est As Decimal
[code]....
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Aug 12, 2011
how can i read the access database and put it all in a multiline textbox?
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Oct 15, 2011
I have a form with multiple combo boxes and text boxes making an invoice.. I have the combo boxes linked to my database and I want each selection to fill a different textbox. The comboboxes fill on form load... How can I fill the textbox with the selected index from the combobox?
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May 18, 2009
Iam trying to add text from a textbox to a access database, tried different ways by tutorals but iam not getting it correct
Const SELECT_ADDRESSES As String = "SELECT * FROM Table1"
Dim inc As Integer
' Get the database file name.
Dim db_name As String = Application.StartupPath
db_name = db_name.Substring(0, db_name.LastIndexOf(""))
[Code]...
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Jun 27, 2012
What is the cleanest, most readable way to String.Format a decimal with the following criteria
start with a sign symbol (+ or -)
a fixed number of fraction digits
no decimal separator
right aligned
pre-padded with "0"'s
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Nov 28, 2011
What is the best way to populate a combobox from a database?I've looked at previous questions but they all seem more complex than my query.Data base table has just two columns, ItemId & ItemDiscription I just need itemId field to show in the combobox.
ie
Connect to DB
put data into dataAdapter
fill dataset from dataAdapter (sql statement)
Fill combobox from dataset
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Feb 3, 2010
how i will save my multiline textbox in my database access only in one field.. every time i click my button save, it will only save the last word that i've wrote. is access supported the vbnewline? here's my code..
rs.Open()
Dim ad0 As String = "insert into [monitor] (confirmation) values(" & confirmation.lblcode.Text & ") "
Dim ad1 As String = "insert into [monitor] (orders) values ('" & txtorder.Text & "') "
Dim ad2 As String = "insert into [monitor] (quantity) values('" & txtquantity.Text & "') "
[code]....
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Dec 16, 2009
I want to populate the textboxs with the access databse fields when i select the combobox.
my combobox is populating but my txtunivdetails is not being populated. I am not able to find my error.
Private Sub UiComboBox1_SelectedIndexChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ComboBox1.SelectedIndexChanged
On Error Resume Next
[Code].....
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Mar 10, 2009
I'm trying to populate an Access Data Table (5 columns) with a Visual Studio front end, but I'm not clear on how to pass the data through the parameters. I have created a connection, a data adapter, and a data set in the project by dragging them onto the form. I know the connection works because I can see my Access database using the Server Explorer. I have an INSERT command in the data adapter and the parameters are represented in this command with question marks. See my insert command below INSERT INTO tbl_ConstraintLogs (ConstrinatChangeReason, ConstraintTagName, ConstraintValueBefore, ConstraintValueAfter, onstraintTimeChange) VALUES The values that I want to pass to the database are coming from text boxes or they are program generated. For example: If I have a variable in my program called "AbcValue", how do I get the value of this variable into the database as the first parameter. I was trying to use the "Fill" command, but I'm at a loss here.
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Jan 4, 2012
I'm playing with an Access database file. And I want to populate a ListView control with Access data. I'm not going to use the DataGridView control. The following is my Access file, which has a table labeled Employ1 with three fields (Usernames, FNames, LNames) as you see below.
[Code]....
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Nov 5, 2009
I am using a textbox's AutoCompleteSource I would like to link a column of a Access database. Is there a reference to it.
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Apr 22, 2011
I've created a basic search form. I have a textbox with a search button and an Access Database as the backend. I have also added it as a new datasource. What I'm looking to do is grab the search string from one textbox and return the data to another textboxt. I have a table called "VehicleInfo" and I want to search the field in my table called "VehicleID" and return the vehicleID I searched for into another textbox. I'm really new to VB. I understand databases and basic code structure, I just don't have a good grasp yet on how these two work together.
Public Class frmMain
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'Garage_ServiceDataSet.Service' table. You can move, or remove it, as needed.
Me.ServiceTableAdapter.Fill(Me.Garage_ServiceDataSet.Service)
[Code] .....
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Apr 27, 2011
I have a listbox, a textbox, and a button. The button populates the textbox with the selected item & value of the listbox. As below:
Protected Sub GetVariables_Click(ByVal sender As Object, ByVal e As EventArgs) Handles GetVariables.Click
Me.txtLetter.Text = lstNames.SelectedItem.ToString & lstNames.SelectedValue.ToString
End Sub
The problem I have, is that when doing this it reloads the page each time. Any way around this?
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Oct 10, 2010
I have a form with several text boxes and check boxes.These are populated via a sql data reader during the form load event.
Private Sub TextFields_TextChanged(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles _
TxtBUsername.TextChanged, TxtBPassword.TextChanged, CBoxAccountDisabled.CheckedChanged
[code].....
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May 13, 2010
Entering Date in Access database form vb.net's masked textbox , just need insert qurey
like ; "insert into table1 values(" & age.text & ",'" & name.text & "',#maskedtextbox1.text# or ????"
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Aug 13, 2009
I am trying to set autocomplete for a textbox using data from a column in a table an Access database. Some of those records in the table have no values. I have set the AutoComplete Mode property to SuggestAppend and the AutoCompleteSource property to CustomSource. When I run the application nothing happens when I type into the textbox. The dataset is called DatabaseDataSet and the table name in the database is called Simple and the specific field/colum is called SIM_TAG1
'Create customsource for tag textboxes to suggest tag terms based on what is in database
Dim oTag As New AutoCompleteStringCollection()
For Each term As DatabaseDataSet.SIMPLERow In Me.DatabaseDataSet.SIMPLE
[code]....
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Sep 3, 2010
I am at a stand still on this one. I know how to connect and add to the database, I just don't know how to retrieve the information so that a user can see it! If anyone could help me with code or another example.
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Sep 3, 2010
I am trying to retrieve information from one row that has four columns(name,company,address,phone) so that once it is displayed in 4 different textboxes, I can transfer to a word document.
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Jan 2, 2010
I'm using a OleDB connection to a access database. I'm entering a row into the database to set some user preferences. What i need to get is get back the row ID of the row I just entered. I'm more familiar with PHP and with PHP I use use this entry
[Code]...
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Mar 10, 2012
I am getting an overflow somewhere while populating my database.The number of records inserted is different every time I get the error and I have been unable to trace where it is coming from.
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