Working With Datagridview?
May 17, 2012i got problem while saved the record.here is my code.
Imports System.Data.OleDb
Imports System.Data
Imports System.Configuration
Public Class Form2
[code]....
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Sort Not Working Datagridview Gives "DataGridView Control Must Be Bound To An IBindingList Object To Be Sorted?
Dec 4, 2009I have a few classes, one is a form, the other is the source of the datagridview. I want to be able to sort the columns of the datagridview by clicking on the header. Here are the classes that I am dealing with:
Imports DiscoveryByte.AddTools.Misc_Tools
Public Class ViewDiscoveryFlashCards
Private DBBindingSource As New BindingSource
[code].....
My DataGridView Can Not Appear To Be Working Right
Aug 15, 2009I can edit values on the DataGridView and as long as the program is running it is there exit the program and restart the program and return to the DataGridView and all changes are gone. I know there has been a lot of posts on this subject and I have read many of them but nobody seems to be using SqlClientCE for the data base and I need instructions of how to make a table adapter say like the following do the trick.[code]...
View 1 Replies.net - DataGridView.Refresh() Not Working?
Dec 17, 2011Private Sub DataGridView1_CellClick(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellEventArgs) Handles DataGridView1.CellClick
If e.ColumnIndex <> 3 Then
Exit Sub
[code]....
I am using the CellClick event to update DB column PaidStatus from Paid to Un-Paid and vice-versa....Once updated i want the updated data to be reflected..i am using DataGridView1.Refresh()....but it does not show the updated data from the DB..i have to close the application and re launch it to see the changes.
Datagridview MaxInputLength Is Not Working?
Aug 8, 2011[ VB.NET 2008 ]
I'm facing new problem that MaxInputLength is not working in my code, my code is here.
I have set 12 for NQty . New Row allows only 12 chars but already existing rows are allowing more than 12.. so here maxinput lengh not working
i have set 7 for N1 Qty but it allows 7 chars for already existing and new rows because i did not assign any values to that column..
Private Sub Load_Grid()
With DataGridView1
.Columns.Clear()
[Code]....
DataGridView Not Working With An Array?
Mar 9, 2009I have the following code, what it should do it write 98 columns down and 15 columns across.but what it seems to be doing to just writing into the 1st column over and over again.
Dim TBF_IST_Min As DataTable = TBF_Dataset.Tables.Add("TBF Minutes")
' Add columns to the TBF_IST_Min table.
TBF_IST_Min.Columns.Add("0-2", GetType(Integer))
TBF_IST_Min.Columns.Add("2-3", GetType(Integer))
[code]....
Datagridview Readonly Not Working?
Oct 30, 2009I have a form with a button and a tabcontrol that has 2 tabs, on each tab I have 1 datagridview in them
both datagridviews are bound in the load event to a different bindingsource each.
When I click the button I fill the datatables programatically, and set some cells and columns on the datagridview to readonly.
The columns are set to readonly on both grids, but the cells are not. Only the cells in the first datagridview are being set to readonly and the cell on the second grid are not.
Further info:
If before clicking the button i switch to the second tabpage on the tabcontrol, and click the second grid on a column, and then go back to the first tabpage, the readonly cells are set fine when I click the button
If I press the button a second time, the readonly cells are set on both grids are set fine.
It seems to me that this error is presented on non-active (in lack of a better name) datagridviews.
I have tried, to call update, refresh, focus, endedit, etc etc on the click event of the button for the second grid but nothing seems to make it work.
Checkbox In Datagridview Not Working Properly?
Aug 16, 2010I have an unbound checkbox in my datagrid view along with other bound fields from a dataset. I do not need to send back the checkbox status to my dataset or the DB. Instead I will loop though the DGV and look for those checked and do another process with them after its done being loaded. The problem is this. When I check a checkbox, then check another, the first one goes back to unchecked and so forth, back and forth. There is no add, update or deletes needed for this DGV.
[Code]...
Datagridview :: Saving Changes Not Working Properly?
Jan 25, 2010i have a windows forms app which displays a bunch of records from my sql database. when i modify records in the grid and click on save, all changes are saved EXCEPT the changes made to the currently highlighted row. they aren't written out the database until i exit the actual program, despite clicking on my save button.so for example, if i change 5 different records in the grid, and click on save, and then click on refresh to reload the data from the database, 4 out of the 5 are saved correctly, but the row that is currently highlighted (meaning, the last row i changed) still has the old data.My code for the save button look like:
Code:
Private Sub TerritoryBindingNavigatorSaveItem_Click_1(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles TerritoryBindingNavigatorSaveItem.Click
[code]....
DataGridView Sorting On Columns Not Working?
Apr 28, 2010I'm using vb 2005, seems sorting is not working if I change the data by code. For example, if I have a simple form with only one datagridview and one button, grid was sorted on column 1, then I press the button to randomly change data in column 2, then use column 2 to sort, the display order is not correct, but after the button click, if I click on a cell, the grid will re-sort by itself, and get the right list. I know DataGridView is not for Editing data...
Public Class Form1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim dt As New DataTable
dt.Columns.Add("C1")
[Code] .....
Datagridview With Access - The Delete Is Not Working
Feb 1, 2010Datagridview With Access - The Delete Is Not Working
View 3 RepliesDatagridview.CurrentRow.IsNewRow Is Not Working?
Aug 21, 2010I can't understand is it VB 2008 bug or I am doing something wrong.But code like:
if datagridview1.CurrentRow.IsNewRow=true then msgbox "That is new row!"
Datagridview.CurrentRow.IsNewRow Not Working
Aug 20, 2010I want to delete rows in datagridview by clicking button. Have found on some sites code like:
[Code]...
But if CurrentCell is on new row and I click to delete row - it's deleting that row that is standing before current selected cell. It means that dgv.CurrentRow.IsNewRow is not showing is realy currentRow new or not! But why? Old VB version? I am using VB Professional 2008
Nested Loop For DataGridView Not Working?
Dec 3, 2010Dim cv As Integer
Dim cc As Integer
Dim CurrentValue As Double
Dim ObsoleteValue As Double
[code]....
Basically this code works for the first column of the DataGridView. It sort of stops iterating after the last calculation of the row is performed and doesn't change the cc value at all. Meaning the loop gets stuck after the first iteration.
Update Method Not Working On DataGridView?
Nov 17, 2011I've been trying to get the update method to work on a DataGridView for the past 2 days and I just can't get it to happen!I'm using a "Save Button" to invoke the update and no errors are thrown but the table is not updated when the save button is pressed.
Private Sub Main_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
With NodesDataGridView.ColumnHeadersDefaultCellStyle
.Alignment = DataGridViewContentAlignment.MiddleCenter
[code]....
VS 2005 Datagridview AllowUserToResizeColumns Not Working?
Aug 10, 2011I have some code written by another developer(no, really). The datagridview has the AllowUserToResizeColumns property set to true, but at runtime the grid will not allow column resizing. I've checked the code to see if the property is being set in code and I can't find anything. Is there some other grid property that, if set to a certain value, will disable column resizing?
View 2 RepliesVS 2005 Datagridview Update Not Working
Nov 27, 2009I am trying to update my DGV with the following code. i have generated SQL update command in the tableadapter. but still the changes are not affecting the DB.
[Code]...
.net - Working In Combination Of TabControl And DataGridView Control?
Jun 3, 2011I am not sure whether it is possible or not? need suggestion.I want to display filenames from 2 different folders into 2 different DataGridview controls that are placed in 2 tab pages of TabControl1. Here is the code that I have tried. By running this code, I can able to show the filenames from a folder onto DataGridView1 in Tabpage1 but not in DataGridView2 of tabpage2.
[Code]...
DataGridView Cell Content Click Not Working?
Apr 6, 2012Private Sub dgvTransactions_CellContentClick(sender As Object, e As System.Windows.Forms.DataGridViewCellEventArgs) Handles dgvTransactions.CellContentClick
If e.ColumnIndex = 0 Then
[code]....
DisplayName DataAnnotations Not Working In WinForms 3.5 DataGridView?
Sep 7, 2011I've used DataAnnotations attribute DisplayName successfully using MVC model binding, and even with WPF/Silverlight model binding and of course it works just fine, but now I'm on a project that I'm forced to use VB.NET 3.5 WinForms.
I have a Linq2Sql model and I created a partial class for one of my classes and included a MetadataType attribute to point to a metadata class. I added a DisplayName attribute to a property in the metadata class. I then bind my datagridview with an IQueryable(Of mydatatype), but the column name in the grid is the Property's name and not the DisplayName.
Am I missing something? Is there something else I need to do to get the datagridview to use the DisplayName?
In my Model class:
Imports System.ComponentModel
Imports System.ComponentModel.DataAnnotations
<MetadataType(GetType(vwREVIEW_ECRMetadata))> _
[Code]....
File I/O And Registry :: Recursion In Datagridview Not Working
Aug 13, 2009In my application I am selecting a folder path and then asking the user if he/she wants to display full path or file names only.
My problem arises when I want to insert the results in a datagridview. The datagridview has 2 columns:
column1 ----> shows file name
column2 ----> shows file size in MB.
with the below code I get the file name and then the file size on the same column one after the other
I want to show as follows:
File Name Size (MB)
sample.txt 1.2
myspreadsheet.xls 0.6
Seanie.bmp 0.8
What do I need to modify in order to achieve this?
Code:
VS 2008 Proper Way Of Working With Percentages And DataGridView And Dividing By Zero
May 31, 2011What is the proper way of working with percentages and DataGridView and dividing by zero..In my code I am attempting to divide two numbers, sometimes one of the numbers is zero..Then I need to add a column to my datagrid, I think i need it to be decimal? So i can sort it later. I had it as a string and everything worked fine excpet i couldnt sort properly.[code]If I change column to Double it handles it fine, then i am not sure how to read the value as a percentage?
View 12 RepliesVS 2005 Datagridview Sort Not Working / Wrong Filling Cells?
Nov 8, 2011I'm working with datagridview.I found an example on the web about creating a datagridview: firs I make my array containing data, then I make a datatable from array, then I make datagridview from datatable.I don't know if it's the correct way but it seems work.In a column I make random numbers for test: for example I have on column "Time" these values: 1155, 1725, 584, 996, 1352.Then I try to sort with code when I press pushbutton: it doesn't work because I have the values:1155, 1352, 1725, 1758 (until now it seems to work correctly), but then I have 584 and 996 values: wrong!Ok, let's try with the manual sorting: same result.I filled cells with "integer" values, let's try using strings, then I used "value.tostring" same result.I also tryed to fill strings with blankspaces to obtain same length, but nothing changed. "1155", "1352", "1725", "1758", " 584", " 996".Then I tryed to fill with "0" values:"1155", "1352", "1725", "1758", "0584", "0996".The same.How can I fill cells values?
View 9 RepliesUnhandledExceptionEventHandler Samples From Msdn Working, In My Code Not Working?
Sep 3, 2009I found on msdn samples and modified (add Thread.GetDomaind.UnhandledException)
<SecurityPermission(SecurityAction.Demand, Flags:=SecurityPermissionFlag.ControlAppDomain)> _
Public Sub Main()
' Add the event handler for handling UI thread exceptions to the event.[code].....
VS 2008 Cannot Seem To Get A Working Filter In Working Order
Jun 18, 2009It appears that my favorite thing in the world is tackling projects that are beyond my current knowledge and abilities. I have a little project that I am working on which is a simple image viewer stocked with (upon completion) your standard Load..., Next/Previous, Zoom In/Out, Actual Size, and Full Screen capabilities. However, I am running into a few snags:
(1) I've been able to get my "Load..." button to display a file dialog box, but I cannot seem to get a working filter (with which only image file types are allowed to be selected) in working order.
(2) I have a PictureBox object (entitled PictureBox1) that displays the image selected via the file dialog box, but it loads images in their full size (1:1/100% zoomed) state without scrollbars, etc. to allow me to navigate the loaded image. I would like to have it load the image, initially, to fit within the dimensions of PictureBox1 and from there be able to zoom in/out via my "Zoom In/Out" and "Actual Size" buttons and be able to scroll if the zoom level is beyond the dimensions of PictureBox1.
(3) It dawned on me that I haven't the faintest idea how to get my "Next/Previous" buttons to allow the user (me) to navigate, in succession, the images contained in the folder in which the currently loaded image is stored. [code]
If it is deemed that this thread is inappropriately requesting help, I ask that it be locked/deleted quickly as I recognize that this is a large community with many discussions going without need of unwelcome posts.
DataGridView Input Validation - Certain Column On Datagridview Should Accept Integers Only, Otherwise, It Will Return A Messagebox
Jun 5, 2011Some codes here on how could I validate my datagridview? I mean, a certain column on my datagridview should accept integers only, otherwise, it will return a messagebox. Kindly include on which event it should be posted.
View 17 RepliesDB/Reporting :: Displaying DataGridView Text Column In A Mixed Bound/Unbound DataGridView?
Mar 15, 2011I have a DataGridView (dgv) on a Windows form (VB.NET) which is bound to a datatable. One of the bound columns is a an ID (Foreign Key) to another datatable. All I want to do is Hide the ID column and populate an unbound column with the Name (ParmName) for the user. I searched the foreign value in the datatable and retrieved the information. I set the Value of the cell in the Datarow. All works well, but does not display. The cell accepts the value...I can even Debug.Print the values to the console. They are there just nothing displaying in DataGridView. Nothing odd about DataGridView. Should be straight forward...
My Code
,
Dim dtParm As DataTable = MyDataSet.tblParameter
Dim dgv As DataGridView = Me.dgvResultNum_DataGrid
[code]....
Sort DataGridView Numbers (when Clicking The Datagridview Column Header Text)
Mar 11, 2010A datagridview is sorting numerical values (when clicking the datagridview column header text) in the wrong order based on the initial digit:
[Code]....
DataGridView - Group The Displayed Data Of The DataGridView By The Primary Key Of Both Tables?
Jul 20, 2011I want to see if anyone has used one table that has a primary key (not displayed) in the DataGridView. Then use a text box on the same form to call and group what if viewed in the DataGridView table. I want to group the displayed data of the DataGridView by the primary key of both tables.
View 1 RepliesDataGridView - Nonvisible Rows Are Still Visible And The DataGridView Is Empty Despite Having A DataSource
Jul 30, 2009I have several problems with rows in a DataGridView. Background information: The DataGridView (DataGridViewCalib) is in one TabPage of a TabControl, some columns of the DataGridView are automatically DataGridViewCheckBoxColumn as the DataSource have some colums which are Boolean. This is a Windows Form written in VB.Net with Visual Studio 2008. The user loads an input data file.
The problems:
1) At first arrival in the TabPage, ShowDataGridViewCalib (code below) is called. All rows are then shown in the DataGridView, despite the code saying that some rows should not be visible. Breakpoints in the code show that the code do arrive at the Rows.Visible = False events. Despite all rows beeing shown a Watch in the debugger shows that:
[code]...
There are two alternative ways of handling the rows in the code. The first attempt (commented away here) is probably the "nicest".