Datagridview With Manually Added Comboboxcolumn?
Jan 14, 2011
i am using a Datagridview on my form. It get's it's datasource from a dataset: grd.datasource=set_temp After that I add ComboboxColumns manually. At the end I loop columns and set values into that cells from the comboboxcolumns. Works perfect so far. Now I click on a header and the sorting is changed, and then the cells from the comboboxcolumns all lose their values, they are all empty.
Why and what do I do to avoid that? Or must i refill those manual Values after sorting?
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Nov 30, 2010
Dim pctofpax As New DataColumn
pctofpax = New DataColumn("PCTPAX1", GetType(Decimal))
pctofpax.Expression = "[ASOFPAX] / [YEPAX]"
[code].....
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Jan 8, 2010
I have a combobox column in a DatagridView, I was able to bind the column to some values from a database using:
Dim myComboBox = New DataGridViewComboBoxColumn()
myComboBox.HeaderText = "Header name"
imyComboBox.DataSource = myDataTable
[code].....
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Jul 12, 2009
I am populating a DataGridView from a DataTable with a DataAdapter (VB 2008 Express, SQL 2008 Express). The dgv is for editing (with SqlCommandBuilder) a SQL table. I have added a ComboBoxColumn ("Type"), with a list, and removed the column from dgv ("Reason") who's index it replaces. What I can't figure out is the binding(?) to have the selected text displayed the same value as that from SQL table that is being edited. The ComboBox displays an index of -1, I need the selected text to be the data from row and field which is to be edited. The list is constant. Code so far is below:
Public Sub LoadDgvComps()
Dim myDA As SqlDataAdapter
Dim dsComps As DataSet[code]......
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Sep 29, 2009
I'm creating a small game which when the user clicking a menustrip item "New game" adds event handlers to each label in a panel control.
For Each scoreLabel As Label In Me.panelScore.Controls
If Not (scoreLabel.Name = "lblLeftBonus" Or scoreLabel.Name = "lblLeftTotal" _
Or scoreLabel.Name = "lblRightBonus" Or scoreLabel.Name = "lblRightTotal") Then
[code].....
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Aug 11, 2010
I have a databound combo box column. When a value in another field starts with an 8, I want to make the combo box read-only and turn the background gray so the user knows it is read-only.
Here is the code I'm using, where am I going wrong? It doesn't change the backcolor to gray.
Private Sub dgvTest_CellFormatting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) Handles dgvTest.CellFormatting
[Code]....
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Jun 7, 2009
Is it possible to attach a context menu to a oomboxcolumn in a DataGridView? That is I want the context menu to display after the user chooses an item in the combox.
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Jun 21, 2010
I use:
CODE:
I want to show with the DataGridViewComboBoxColumn two fields from groups table . But i want only link field "articlenb" to column, but a want o show filed "Articlenb" and I want to show fields "groupnb" and "groupdef"
My question is how do this?
Here is my code for ComboBoxColumn, with one field from groups table.
This works well!
CODE:
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May 24, 2011
I have a child form in an MDI application with a datagridview comboboxcolumn. I'm filling it with string values. When I load the form independently of the parent, I am able to set values for the comboboxcells. But when the form is loaded as part of the MDi application, with the same exact code, the cells are empty.
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Mar 29, 2011
I have a child form in an MDI application with a datagridview comboboxcolumn. I'm filling it with string values. When I load the form independently of the parent, I am able to set values for the comboboxcells. But when the form is loaded as part of the MDi application, with the same exact code, the cells are empty. I've spent hours trying to figure out why this is happening but have no idea.
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Jan 24, 2012
I have a GUI which allows the user to select a report to view/edit. When the user selects a report, it shows the Items in the report. The Item has many properties - most of which are binding properly. One of the properties is Owner, and this is bound to a ComboBoxColumn.
Report
Items
Owner
I have done something very similar to this a few times and had no problems when I set the DataPropertyName, DataSource, ValueMember, and DisplayMember. The only difference is that this time instead of the Item type having an OwnderID it actually has an instance of the Owner object.giving the items bound in the list a self-referencing property that allows them to return themselves for the purposes of setting the ValueMember.However, When I bind it this way:
OwnerColumn.DataPropertyName = "Owner"
OwnerColumn.DataSource = ownersBindingSource1
OwnerColumn.ValueMember = "Self"
OwnerColumn.DisplayMember = "OwnerName"
I get a lot of errors like: Unable to cast object of type 'System.String' to type 'Owner'.
and:
The following exception occurred in the DataGridView:
System.ArgumentException: DataGridViewComboBoxCell value is not valid.To replace this default dialog please handle the DataError event.I was able to get around some of these errors by binding it like this:
OwnerColumn.DataPropertyName = "Owner"
OwnerColumn.DataSource = ownersBindingSource1
and also by making the ToString function on the Owner display the OwnerName property. This seems pretty hacky though - and I think I'm misunderstanding something fundamental as it still does not function properly.
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Sep 22, 2010
With the two lists (t1s and t2s), I want to display t1s in a DataGridView, and in one column show the T2 property as a comboBox column, which dropdown will show the t2s list such that a new list instance can be selected. T2 has a Name property that should be used for displaying it in the comboBoxColumn.
I'm able to display the dropdown, but remaining a few problems:
1. How to display the correct comboBox "selection" on "load"?
2. How to change the T2 child object instance when combobox selection is made?
3. This is a really basic problem, which suddenly happened and I just couldn't understand what I have changed; The code marked BLUE now just shows empty cells.. While the AutoGenerated columns do show values.. Shouldn't those "manual" columns work?
[Code]...
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Nov 25, 2009
I have a comboboxcolumn in a DataGridView. I have loaded int with string data that appears in the dropdown box. I have added an event to it for an SelectedIndexChanged. What I am trying to do is autosize the width of the cell in the column based on the string chosen in the drop-down box within this SelectedIndexChanged event. This seems to work but it does not work off the initial selection change. When I select the desired string in the dropdown box the width of the cell does not autosize. I am not sure why.
I was trying to get around this by wrapping an IF stmt around the autosize logic by saying if cell value = "" then cell.width = Max Width of all loaded strings/ However, I can't figure out how to access the string array loaded into the dropdown list
[Code]....
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Dec 16, 2009
I am using VB 2005 professional and SQL Server 2005 express edition.
For the last two weeks I have been trying to have a datagridview control on a form that will have datasource from a dataset with two tables that are related. I want child the column to be a ComboBoxColumn where userts can select options and update the other data(from the other table).
I have two tables in an sql server 2005 database named computers:-
computers
locations
Table computers looks like thisID is the primary key column)
ID Location
Computer139
Computer240
[Code].....
With the location column being a ComboBoxColumn so that when a user enters a new ID say Computer5,they have a choice of a dropdownmenu for the Location column. In the database table computers the item should be saved as well as the index value(to correspond to the LocationID).
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Jul 27, 2010
easy way to simply load the data from database into a datagridview with one of the columns being a comboboxcolumn. Apparently there is no selectedvalue, selectedindex or value as in a combobox to return the combobox value. What I need is to verify if the database value is 'true' and if it is then I need to set the comboboxcolumn with a specific value.
Ex:
if ds.tables(0).rows(0)("flag") = "true" then
datagridcolumn.selectedvalue = 1
else
datagridcolumn.selectedvalue = 0
end if
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Nov 27, 2009
I'm pretty new to VB.Net programming, but have already been able to figure out many things using this forum, but also via the many other forums on the internet.I'm currently stuck with a question though regarding getting the clicked value in a datagridview comboboxcolumn.When I use _Selected IndexChanged and then check the current cells value, what I get is the value before I clicked the new one in the comboboxcolumn.When I use _CellEditFinished, I can get the new value, but only after I selected another cell, or changed focus to another object.How do I get the new value from a DataGridViews ComboBoxColumn the moment I clicked it in the pulldown menu from the ComboBoxColumn?
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Jun 10, 2009
Historically I used Tek-Tips for stuff like this but I can no longer access my account there and they do not respond to form based mail. Maybe they got tired of the questions too :-)
I am not a student. I manage a 'large' network. Every now and then I need to roll up something for a specific task. Most of the stuff I write only sees my desktop so neatness and originality are not an issue.My current 'project' is throttling back a few of my users disk storage. I am not allowed to implement Quota's (Server 2003 infrastructure) so I thought the next best thing would be a duplicate file report. I purchased Folder Sized 4 which is a beautiful product (I have used it since it's humble beginnings as Bullet Proof Folders). The end users claim that the filename and date checks are not enough to prove a duplicate. Enter my idea.
I have cobbled together a MD5 hash generator from a function found out on the web. Now I want to send the results to a datagridview instead of my current disk files.I has thought that I could access the rows & columns like dgv.row(x).column(x) = "strFile", dgv.row(x).column(y) = "strMD5"Nope, hunting through the available properties did not point me to any likely candidates.
Again, if this is not the place for questions of this nature please let me know. I am not a programmer, nor am I in training to be one. I just toss little things like this together when needed. Importing a CSV file into Excell is working, but it seems rather lame to be taking so many steps.
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Sep 17, 2007
I'm adding rows to a DataGridView via the following function, passing in one or more DataTables.The DataGrid is not aware what column(s) are coming back, but appears to build the column names okay.It's when it adds the individual cells (highlighted) that I get the following message:
ArgumentOutOfRangeException was unhandledSpecified argument was out of the range of valid values.Parameter name: rowIndex
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Sep 11, 2011
I'm adding rows to a DataGridView via the following function, passing in one or more DataTables.The DataGrid is not aware what column(s) are coming back, but appears to build the column names okay.
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Apr 23, 2010
I would like to update data from my datagridview to ma database manually.
How should I determine which rows were edited?
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Oct 1, 2011
I have a datagridview on my desktop application, what I need is to show in a a textbox the sum of collums values, of rows selected manually. Is this possible?
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Nov 19, 2010
The situation: I have a datagridview with one column (col1). In the datagrid definition (design view), i have created this row, and set the formatting to C2 (or C0, or C - I tried them all). then, I load my datagrid view pro programmatically :
dbl_myValue as double
dbl_myValue = 6.99
datagridview1.item(0,0) =
dbl_myValue
The datagridView shows the data correctly : 6.99$. When I "spy" on the datagridview.item(0,0), the "Value" property is a Double.
the problem: It don't work if the user manually enter a value : click in the cell, enter a numeric value (let's say 100, without decimal to avoid complexity) and then LEAVE the cell (so no more in EDIT mode). The formating just don't applies. When I "spy" on the datagridview.item(0,0), the "value" property is a STRING. So I guess this is the problem, but how can i do?
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Sep 23, 2009
I've been playing with a DGV. Let's say for my question here, I want a grid that is 10x10. I would like the font in each cell to be Arial 10 regular. Only one character will be in each cell (I'll use "M"). I would LIKE the cells to be 17 pixels by 17 pixels. But, if I manually force the column width to be 17, I get about half of my M and three dots "M...". I'm thinking this is a padding thing but as far as I can tell, everything is set to 0. See code and then more comments below:
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
With DataGridView1
[Code]....
Question 1: How can I reclaim some of what seems to be lost space around the cell contents so I don't have to make them bigger than they need to be? I'd like them to be 17x17 with the single character centered within.
Question 2: Do I have to manually set the height and width of each row and column? I'm thinking the RowTemplate setting but can't seem to get it to work.
FYI: This is a new project with a DGV dragged onto the form. All changes have been made programatically.
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Sep 13, 2009
Is it possible to manually save data from my dataGridView to my SQL server database table?
if it is possible can some please tell me how to do it because i don't like using the data sets and reader VB has because it doesn't give me full control over the procedure.
please see the code below it all works fine its just the last two line im struggling with, which is where i am trying to save the data from the two columns in my DataGridView [code]...
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Sep 13, 2011
I have two datagridview's both are databound. First one shows items for sale and the second stores all the items that were sold. I am trying too transfer selected rows from one to the other but no matter what I keep getting told "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound."
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Feb 9, 2010
I need to move and set focus on a newly added datagridview row. My grid is sorted is descending order and will have the new row at the top. My code is currently highlighting the new row in blue, but focus will be on the bottom row, on the first cell.
[Code]...
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Sep 9, 2011
I'm using the following code to add a new record to a table in the database. However, the DataGridviewthat's binded to the DataTable, isn't getting refreshed /updated.[code]...
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Sep 16, 2010
With this project, I created a SQL Server DB with related Dataset and DataTable a while ago with about 10 columnsWith the code below, I fill those columns with values in a new row and add to the datatableThe datatable is bound in a datagridview and all has worked fine until I tried to add a new column to the dataset/table. After adding the new column and rebinding the datagridview to the updated table, the DGV now shows the new column, but the data for that column fails to show up in the DGV.
Dim dt As Date = DateAndTime.Now
If My.Forms.DataGenerator.TextBox4.Text <> "" Then
My.Forms.DataGenerator.TextBox8.Text = dt
[code].....
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Jan 7, 2012
I had a functioning datagridview that was created from VB2010's datasource by clicking on a table, picking datagridview and dragging to a form. I changed three of the columns of the grid to comboboxes bound to different tables. If I change a value in a column (not a combobox column which still shows the value from the original table), I receive InvalidOperationException was unhandled on Me.TableAdapterManager.UpdateAll(Me.MasterDataDataSet). What code do I need to add if I change columns to comboboxes?
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Mar 17, 2011
I have a datagrid view in my vb.net application. I want to update this DataGrid View so it shows any changes to the database (More specifically when a Column is added). I have tried
DataGridView1.Update()
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