Combobox That Gets Its Values From A SQL Express Tabl
Jul 13, 2010
In a VS2008 VB project, I have a combobox that gets its values from a SQL Express table. This table has three columns. I want to display the value from one column in the combobox, and obviously the user will select from this. I want to then write the value of the selected record from a second column back to a different table, and I also want to change the value of a radio button (on the same form as the combobox) based on the value of the third column of the selected record.I'm setting the ComboBox.Text value to be the first column, the ComboBox.SelectedValue to be the second column, but how would I change the radio buttons in the most efficient way? If it was VB6, I'd probably make another trip to the database to find the value of the third column based on the selected value from the combobox. I'm not familiar enough with the tableadapter concept but I suspect I should use them to do what I need.
My problem is when i insert new row from vb.net 2008 to table build by sql the process already done but i can't see new row in the table, this is my code
I have filled a DVG with information and added another column to index(8) pragmatically Now i want to create a combobox with values depending on values in other cells on the same row so each row will have a combo box with different selections. below i have placed the code and hoped someone would have some input on how to approach this. i have tried datagridviewcolumn but that fills every row with the same information regaurdless of a if statement
I have created my first ComboBox form but now I am stumped. I am using VB Express 2010. What Toolbox or Property buttons do I use to generate code for the following:
(1) Title.Text (to add text on my form)
(2) Title. Location (location on the form)
(3) Items.ADD (to add the options on the drop down)
(4) Dropdownstyle
Please give instruction like On ToolBox (left side) click XXXXXX , then click, then click.
I'm following this example code: url... but doing it in c#.I don't know how to express the following in c#:[code]Specifically, I do know to prefix hex values with '0x' but what is are the S's all about on the end of some of these values? Also on the third line when I convert it to 0x80000000 I get an error saying it can't convert from uint to int implicitly. Not sure if I should just cast, or change the type of the variable?
I would like to have one combo box associated with another combo box. When the first one is selected the price is displayed in the next one. The information is got from a txt file and the item name loads in the first combo box and the price loads in the other combo box. What I want it to do is to show the correct price when the first box is selected for the item Here is a copy of my code at the moment. [code]
I have started a form application using visual studio 2010 express, vb programming. I'm using Access as my database.My goal is to have ComboBox1 display a ProjectID and ComboBox2 display a TestNumber. Once the Test Number is selected I want my textboxes in the form to display fields from the row that the selected Test Number is in.I have 2 tables set up right now "Projects" and "TestData". The "Projects" table has a [ProjectID] field, the remaining fields are just misc. project data. The "TestData" table also has the [ProjectID] field, and then the [TestNumber] field, then the remaining fields are misc. data.
Filling [ProjectID] in textbox1 is easy, in the properties I select DataSource from the Projects table, display [ProjectID] field. Where I'm having troubles is ComboBox2 displaying the TestNumber from the other "TestData" table. If I select that field, it fills the ComboBox with EVERY TestNumber there is. So for Project 1 there is a test 1... over 500 projects, that combobox lists 500 Test 1's, no way to tell what project it belongs to...How do I make ComboBox2 only display Test Numbers that pertain to the Project number selected in ComboBox1?Using this code I can get it to work:
Dim ProjectNo, SQLString As String Dim dtTableData As New DataTable() Dim dbDataAdapter As OleDbDataAdapter
[code]....
I also imported system.data.oledb Problem with this code is it will only filter data in ComboBox 2 but when you make your selection from ComboBox2 it won't activate the row so none of my databinding textboxes fill anymore. Before the code/query is ran it fills up the textboxes perfectly after every selection I just have no idea what project that report number belongs to because the whole field is displayed in the dropdown. I can fill the form with ComboBoxes and they display the corresponding row data because I use a "datasource" instead of textbox "databindings" but I don't want to use 20 comboboxes as my entry form...
In a combobox dropdown. What toolbox or properties do I use in VB Express 2010 to add a default to my drop down so the user will see the default when the panel is first shown?
Intellisense in VB 2005 Express is showing lots of member items when hovering over a variable instead of showing the variable value. For example, when hovering over DataRow("Field"), instead of showing what's in Field, it shows all the members of the Datarow object.
Is there a way to change this, so I can see variable values without using the debug window like so, ?Datarow("Field")
I have a simple windows form application (I'm working in Visual Basic Express 2008). There are some forms that have simple text boxes. When somebody wants to edit something in this boxes he pushes edit button and then they are enabled. I insert some text and when I save this text is saved for good.
When I reopen the application this text is there like I want it to be. Just for information, this text is always the same in one text box, until I change it (me or some other user) - so I think there is no need for databases. For my needs this is ok because I don't need to change this data often. This is code in Form load event (for calling back the data)
i'm using visual basic 2008 express edition and having a problem in saving the data i've added in datagrid to excel. i use inputbox to add data into the datagrid. when i click the save button, the data from the datagrid must be save to excel. this is the code i get from some forum and i already edited it but it only saves the last data/row i inputted.
I was useing VB a lot for some years ago and now I have started again..then, think I was useing VB3 or VB4 there was a property on ComboBox and listboxes that allows only to select the values in the Combox.. Not able to write own values..
I have an XML file, and a ListView control shows the data through aDataGridView control as shown below.Now,This Japanese web site helps me understand how to get cell values.And I'm trying to populate ListBox and ComboBox with the values from ListView's Column 2.
For j As Integer = 0 To ListView1.Items.Count - 1 ComboBox1.Items.Add(ListView1.Items(j).SubItems(1).Text) Next j
I display some values in a combobox that come from an array.By default the selected index of the combobox should be the first item.
If cboAtt.Items.Count = 0 Then For i = 0 To nums(att) cboAtt.Items.Add(cat(att)(i)) Next
[code]....
This works perfectly, but now I want the combobox to display the new (initial) value that is swapped, except than when I do that the cboAtt_SelectedIndexChanged event is triggered which results to an infinite loop --> crash.
for example TextBox1.Text= 12,34,45,67,67 Dim process_string As String() = TextBox1.Text.Split(New Char() {","}) Dim process As Integer
[Code]....
i want to add values in reversed order in combobox2 that are available in combobox1 but when i run the application the second combobox remains empty and not showing any value.
When I update but do not really made any changes to the value and press the update button, the data becomes null. And it will seem that I deleted the value.I've taught of a solution, that is to add both combobox1.selectedtext and combobox1.selecteditem to the function. But it doesn't work.
combobox1.selecteditem is working when you try to alter the values when you update. But will save a null value when you don't alter the values using the combobox combobox1.selectedtext will save the data into the database even without altering.But will not save the data if you try to alter it.-And I incorporated both of them, but still only one is performing, and I think it is the one that I added first:
I'm using ms access 03 to fill a datagridview no problem. I have 4 fields(id, first, last, points), but I just want to fill one in a combobox I have. Here is what I'm using to fill the datagridview:
Dim con As New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:Documents and SettingsPC #6My Documentsstudent.mdb") Dim sql As String = "Select first,last,points from student" Dim oledbAdapter As OleDbDataAdapter Dim ds As New DataSet [Code] .....
How could I get a combobox to just display just one field, like idk if I'm explaining myself correctly, like a SQL statement look like this: Dim sql As String = "Select first from student" but just for my combobox.
Is it possible to have a different selection of values in the 2nd combobox depending what was picked on the first combobox? For example an American state is picked in the first combo box and the second combo box loads the cities in that state? I'm just using a basic form in Visual basic 2010 there is no database behind it.
sqlsub = "SELECT distinct field1, field2" sqlsub += " FROM tbl I Dim da As OleDbDataAdapter Dim lsdataset As New DataSet
[code].....
My prob is how should I bind the combo with field1+"("+ thpr+ ")" thpr is the string i get from function by passing field value 2 from query my combobox should be displayed as field1 + (thpr).
I want to check if two combobox values are equal. The comboboxes are in a datagridview.I found you need to use datagridview_EditingControlShowing to add a handler to the comobo boxes for selectedindexchanged. I can do this with this code.
Code: Private Sub dgridRegisters_EditingControlShowing(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewEditingControlShowingEventArgs) Handles dgridRegisters.EditingControlShowing Dim combo As ComboBox = CType(e.Control, ComboBox)
[code]....
However, the message box comes up for every combobox in my datagrid when I change the index, not just the cmbPort2. I would like to have something like this...
If cmbPort1.selectedindex == cmbport2.selectedindex then 'do something endif
How I could go about checking a typed value in a combo to the values in the combo box. I am making a system to select lockerID and Supplier ID I want the user to be able to enter the value in the combo box as well as select the value form the list in the combo box. Here is the code I have been trying.
If cboStockID.Text = "" And cboStockID.Text <> cboStockID.Items.ToString Then MsgBox("Please enter Stock ID") Exit Sub ElseIf cboSupplierID.Text = "" Then MsgBox("Please Enter Supplier ID") Exit Sub End If
the combox is bound database table,but it is not displaying the contents of table in database,instead it is displaying corresponding null values(blank).it is showing just "select" and the blank spaces corresponding to the number of items in database
here is my
Function combobfill() As DataSet addconnection.Open() Dim selectstring As String = "select materialsname from materialtype_table"
I have a form with a number of controls based on those controls and a database i filter what data i want to be in AllowableHeightsCombobox. I am using an Arraylist to hold the data. The problem i am encountering is that after filling allowableHeightsCombobox once, it will not update or change the values in it. this is the only place where i change the AllowableHeightscombox's datasource.
Is possible to have different values of combobox on the multi same form?
Actually I want to make a multi same form, but with one combobox to set the authority. When different persons to use this same form, I will have different selection limited on this combobox,
