Tinyint In Datagridview Combobox?
Dec 26, 2009
I have a bound datagridview on a form. The designer has added a column from my SQL DB(type tinyint) as a textbox colum. Now i'd like the cell to be displayed as a combobox column since its a month value column e.g. 0-12.
Through the designer I changed the column type to Combobox(which means the column is no longer bound) but when I try to load the form now its always coming back with a "Object reference not set to an instance of an object". The annoying thing is VS is not telling me exactly which line of code is bringing back this error but it does show me the stacktrace which points to the designer code.
*I've made sure to add all the possible combinations in the combobox column's items list*
I've been doing some research and some people point to tinyint dataype not being 'liked' in vb.net so a direct cast needs to be done. However since am doing this in the designer am not quite sure where exactly to cast?, assuming to type Byte? Going through the designer generated code I can see its already doing a cast of its own:
DataGridViewCellStyle9.Font = New System.Drawing.Font("Calibri", 9.75!, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, CType(0, Byte))
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Nov 2, 2009
I would like to know how can I use tinyint in SQL Server 2005 with VB.NET. someone know all data types in SQL Server 2005 are matching to which VB.NET Data types. I face that problem now. For example: tinyint in VB.NET, money in VB.NET, smalldatetime in VB.NET.
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Sep 26, 2010
I just read little bit about macro and was trying to create the one in .net I was able to do very small operations since I dont know much about vb.net and regular expressions.I want to create a properties and variable declaration for the below code.What will be the regular expression to parse this string. So that I can get all the components to create a property from this.
,<Status, tinyint,>
I am trying to create macro that can parse above string into
private byte _Status;
prublic byte Status { get; set; }
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May 2, 2012
DataGridView TIPs has TextBoxes and ComboBoxes in it and the data comes from an SQL table. I see how to get or set the cell values that come from the ComboBoxes using Item, but how do I access the actual ComboBox events and properties?
[Code]...
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Dec 5, 2010
I would like to manually insert values in a combobox colum of a datagridview.I am using the DGV as an UNBOUND control.
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Jun 29, 2009
I have combobox column in datagridview.I have loaded a particular database table column value into it from my mysql database. The combobox in all the rows is filled with my database value successfully.But i am unable to select values from it.
And my second problem is I am unable to retrieve the penultimate row values in datagridview before the new row which is automatically generated.The error for it is nullpointerexception. But i have values in that row.
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Feb 20, 2011
I have a dtagridview with textboxcell type. I want to add combobox at row9 and in coulum 1.[code]...
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Jul 6, 2010
I have a combobox on a datagridview on my form. The problem I encounter is I have to click the button twice to see the items at the dropdownlist rather than once at runtime. Is there any change I can make probably in properties of the datagridview / combobox to show the dropdown list by clicking once rather than twice..
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Jul 6, 2010
I though the problem was resolved but unfortunately is not.. I added this code to my form; Me.DgvReturns.Item(6, 0).Value = Me.DgvReturns.Item(5, 0).ValueThis Only affects the first line of the datagridview.. The second, third, fourth etc etc records are not reflected. Therefore, the vale of the textbox is not shown on the combobox.
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Jul 7, 2011
Is it possible to have a column in a Datagrid with Only one combox at the second row and rest of the column remains empty ?.. means I want to have only one combobox at the 2nd Row and nothing else in that entire column...
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Jan 20, 2010
i have seen the message describing the problem where the autosizing of the combobox column in the datagrid view will cause an error stating "datagridviewcomboxcell value is not valid"
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Nov 1, 2011
I am using visual studio 2008, vb.net Windows app and ms access 2003.I just wanted to know that there is a form in which i select an option from the list of options in combobox.. While the user selects a type, i want the data relevant to the type be displayed in the datagridview. I have bound the datagridview to datasource in design..But am blank as to which event can i use and how should i start it ?? Went through various sources, but seemingly vague.
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May 18, 2012
I have a datagridview which have a ComboBoxCell, ComboBox is bound to data,, I want to use it as Traditional ComboBox,, I mean I want to display its Item (from display members) on the base of its value.
For example:
When I do this
Datagridview1.CurrentRow.Cells(4).value = 4 'Cell 4 is the DatagridviewComboBoxCell
It gives me the error that
"DatagridviewComboBoxCell.value is not valid",
But I want that this combobox should Select And Display the item which value is 4.
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Nov 16, 2009
Using VB.Net, I have a DataGridView with a ComboBox Column. What even do I use for when the user changes a selection in the ComboBox?
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Jun 21, 2010
I am trying to add a combobox into my datagrid which connect to access database by using the code below. The result I wish to get is the combobox is locate at my datagrid column that already exist, but what I get now is it will add a new column with combobox that I want to add. Can I just update the combobox into my existing column7 but not a new column?[code]...
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Nov 17, 2009
I have datagridview connected with sql datebase and i want to add combobox to datagridvew (example:Time1 column)
Option Explicit On
Imports System.Data
Imports System.Data.SqlClient
[Code]....
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Sep 9, 2010
I bound a column ("Initials") of DataGridView (which is bound to dataset ds) to dataset ds2 ("employees"). This part works fine (comboboxes appear loaded with employees initials in combobox selection), but theere is no default value in the column. Do I have to add some event handler or binding stuff??
[Code]...
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Sep 3, 2009
Because there was no aswer in Windows Forms General general forum i decide to post the same question in here... is about cascading comboboxes in vb.net.. Could somebody give me a guideline how to stop previouses selections of dissapearing when another selection is madein a new row... [URL]
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Mar 3, 2009
I am trying to have cascading comboboxes within a datagridview.I have it partially working. dataset1 has 2 tables, with a parent-child relation built inDatagridview1 contains:column 1: combobox, bound to bindingsource 1 which is bound to dataset1column 2: combobox, bound to bindingsource 2 which is bound to bindingsource 1when column 1 is selected, column 2 choices are limited to those related to column 1however, if column 2 is chosen in a row that previously had data, and was loaded with the form, then its choices stay the same as the last row where column 1 was physically selected before column 2.I seem to need to refresh the binding source somehow to emulate how it works if I was to go into column 1 and make a selection by hand.H
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Jun 3, 2010
I add a combobox column in datagridview. When I select differnet value from the drop down list, combobox's text dose not change. What should I do for this?
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Aug 1, 2011
For example; I have a DataGridView bound to a MYSQL Database. There are two string columns "Name" and "Gender". I need to make the "Gender" column a ComboBox where they can select "Male" or "Female".
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Apr 1, 2011
I feel like this is simply but I can get a straight answer anywhere. I basically have a database hooked up to my program and what I'm wanting to do is have the database query "thedate" and only display the rows that much that selection.
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Mar 6, 2011
I am using vb.net and winforms.I have a Form with a Bound DataGridView. On the DGV I have 5 columns with ComboBox. I am using the Editing Control Showing Even to catch the ComboBox Selection. (see code bellow).Here is the problem: After I click on a Cell with a ComboBox and make a Selection and then update the underlying cell (cell = selected value) and then click on another Row of the DGV it goes haywire. If after I update the Cell I do and EndEdit on the corresponding row of the DataSource it seems to work find.How can I determine whe corresponding Data Source row so that I can automate this? [code]
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Mar 3, 2011
I have a Data Grid View and some of the columns are of type ComboBox. What happends is that when I click on a cell that's a ComboBox it Selects the ComboBox but I have to click it again for it dropdown and show the Combox Items
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Jan 21, 2010
In a form, I have a Combobox (named cbArt) with the values: 1, 2, 3 and 4
I have a table with the fields: Id, art, name, width
I wanna put a datagridview in my form, so always I change the value in the CbArt the Datagridview shows me the fields with this SQL:
"select * from artigos where art='" & cbart & "'"
But, how can I pass the value of the cbart to my Datagridview's SQL?
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May 22, 2010
I have a form with a DGV bound to a SQL database. the DB has three colums: ItemCode, ItemName, Status. The Itemcode field is a combobox complex binded (if this matters), the ItemName colum is a textbox. How can I have the ItemName colum auto insert the text for the ItemName colum when I select the associated ItemCode with the combo box. I'm pretty sure I need to use the "CellValueChanged" event. I'm thinking an IF Then statement with 'e' parameter and colum and row indexes just not sure how to address it.
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Jan 10, 2012
I have a datagridveiw combo box with a few values in there. I am trying to capture what user clicked. I tried CellValueChanged, CellContentClicked etc. but nothing works.I want to store this value to a variable (important) and then shift the cursor to Column after user has selected value.
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Jul 19, 2011
I have a datagridview containing 1st column (combobox), 2nd and 3rd column is textbox. The combobox was filled-up using datatable. My problem is on loading form, I will get a records from my database and set the value of my combobox base on those records. So if I have 5 records from my database then I should have 5 rows containing combobox in my datagridview.
I tried the code below but there's an error saying "the following exception occured in the datagridview...." but it will display correctly, but if I click in any cell that error always appear.
Private Sub frmEditIngredientManagement_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
sSQL = "SELECT * FROM fs_nutrient"
[CODE]...
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Aug 2, 2009
I m facing one prblem regarding combobox column in datagrid view I m using following code to fill months in combobox
Cmb_ApplicableMonth.Items.Clear()
For i = 0 To DateDifference - 1
Cmb_ApplicableMonth.Items.Add(DateAndTime.MonthName(DateAdd(DateInterval.Month, i,
[code]......
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Jan 10, 2012
I have a datagridveiw combo box with a few values in there. I am trying to capture what user clicked. I tried CellValueChanged, CellContentClicked etc. but nothing works. I want to store this value to a variable (important) and then shift the cursor to Column after user has selected value.
[Code]...
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