1. I can check a DataSet for errors with DataSet.HasErrors and I wonder how to check the same thing for a DataGridView.
2. Coming from MS Access I am not used to batch editing a dataset via a datagridview for instance. Think of a multi user Windows forms application / SQL Server setup. So I wonder if it's ok to just save the data after a row has changed, edited or deleted and not wait till all modification are done and then do a batch update?
get cell value when checking on datagridview vb.net.
View 4 RepliesI 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
..but it doesn't seem possible.
I have an unbound Datagridview which gets its data from an array from an Excel sheet. I give the user the chance to amend this data in a Datagridview. I then need to know if the user has changed this data before processing it further. I have in vain, tried to use IsCurrentRowDirty, IsCurrentCellDirty, looping through DGV matrix etc. It seems that because the DGV is not bound to a dataset then the normal properties like HasChanged and the 2 above don't seem to work. Here is my attempted code which is not working:
Dim DGRow As DataGridViewRow
Dim DGCell As DataGridViewCell
For Each DGRow In DGV_ReviewDetails.Rows
[code]....
I doing something really simple on vb studio 2008 express, i added a table from a datasource directly to the windows form and created a datagridview the table has no data yet, it has a primary key id int, and some columns some of then allow nulls, i added the entire table with the common steps and when clicking in the add button of the bindingnavigator twice i get the not nullable column is allowed exception but i dont know where does this exception ocurrs beacuse it breaks with no code line another thing is that i clic on the delete button when theres no data and i get an invalid operation exception again with no code line break why is this configured that way? am i missing any step in order to avoid this exceptions?, i tried to handle the dataerror event of the datagrid and set throwexception to false but some errors are not trapped like the ones at the top of this?
View 2 RepliesProblem: Calling a method which uses a cell's value from a DataBound DataGridView. Works as desired without adding an image column.When I add the image column, the method attempts to use the value from column 1 instead of column 2, as the code in the 2nd method below ("findSign") states:
vb
Private Sub getAtmTOF()
Try
[code].....
I am adding the text of a label into a datagridview. But before i do the insert, i want to check if the text does not already exist in the datagridview.
View 1 RepliesI have a datagridview with a bunch of columns, one of them being an Image type (DataGridViewImageColumn).What I want to do is basically check to see what the file path of the image in one of those cells is.
I've tried doing like:
If (DataGridView1.Item(7, Number).Value.ToString = "some path" then
'do stuff here
End if
but it always says DataGridView1.Item(7, Number).Value.ToString is just "System.Drawing.Bitmap", instead of the actual file path of the image in the cell.I've also tried the above, without the .ToString, but I get an error saying System.ArgumentException was unhandled (Argument 'Prompt' cannot be converted to type 'String'.)
I have a DataGridView1 populated by sql searches. On the rare occasion that nothing is returned, my app cannot make use of data so I'm trying to check for null values. My code below is not correct because IsDBNull is not a member of the of the DataGridView1.
If DataGridView1.SelectedRows(0).IsDBNull Then
MsgBox("Nothing to display")
Exit Sub
End If
how the various elements that help you handle errors work together. Have tried several options and can't make head nor tail of it. The underlying table has two columns, an autoincrement integer and a text column with the following settings:
[Code]...
I'm trying to read rows in a DataGridView and the following error is thrown up. The DataGridView was filled from an Excel Sheet with a column of currency. Ideally when the For Next loop finds a cell it doesn't like, I want to to ignore and resume the loop. The error message is: Object reference not set to an instance of an object
HTML
Try
For Each row As DataGridViewRow In Me.DataGridView2.Rows
FirstString = row.Cells(0).Value.ToString
[CODE]...
I have a .net application that uses customerrors web.config module to display meaningful messages for errors. It works without any issues for 500 errors/exceptions caused by non-ajax and ajax components (updatepanel). However, in a scenario where updatepanel's asynchronous request times out, there is no error raised at all. I was able to see the timeout in firebug and come up with a solution that would at least display the error message as an alert and then redirect the user to the 500 error page using javascript but it's not quite doing what the rest of the application does in case of an unhandled errors like these. I basically just want everything to go through "LogEvent" mechanism so based on the severity of the error, it does the necessary work.This 500 error page doesn't have anything in the Server.GetLastError() for these timeout scenarios. Is this an expected behaviour? Can it be changed so I do have access to these timeouts in Server.GetLastError() OR maybe just run this error through "LogEvent" mechanism? Is there a better/more graceful way to handle this issue?
Below is my code to give you an idea, not exactly what I have in my application but pretty close.
Web.Config
<customErrors mode="On" defaultRedirect="~/Errors/ErrorUnknown.aspx" redirectMode="ResponseRewrite">
<error statusCode="500" redirect="~/Errors/Error500.aspx" />
</customErrors>
[code]....
Is there any better performance by checking for a true value like this:
[CODE]..............
Than like this:
[CODE]..............
How do i mask my DataGridView (column Date) in the following format MM/DD/YYYY and if its in the wrong format MessageBox.Show ("Check Date. It must be in the following format: MM/DD/YYYY") This is what i have so far in my code....
[Code]...
So when i build or click debug on my program. No errors come up and its smooth. So i decide to publish my programme. However. I come up with a bunch of errors during the publishing.
Here they are:Error 1 Cannot publish because a project failed to build. 1 1 Simple CALC
Error 2 Unable to copy file "binReleaseSimple CALC.exe.manifest" to "binReleaseapp.publishApplication FilesSimple CALC_1_0_0_0Simple CALC.exe.manifest". The specified path, file name, or both are too long. The fully qualified file name must be less than 260 characters, and the directory name must be less than 248 characters.
I am writing a app in VB and get errors with inserting or deleteing records. I can do a try catch in by app, but I would like to know how to make the cryptic error messages that I get back from my tableadapter queries into messages that make sense to the end user.
Ex. ERROR [23000] [Microsoft][ODBC SQL Server Driver][SQL Server]The DELETE statement conflicted with the REFERENCE constraint "FK_License_Vendor". The conflict occurred in database "AssetsSQL", table "dbo.License", column 'VendorID'. ERROR [01000] [Microsoft][ODBC
[code].....
i get this big error whenever i run my program on another computer. Basicly it says im missing a dll. Is there a code that if there is a error i will just continue running insted of pulling up this window and saying .Net Framework Error.
View 2 RepliesFor some reason this is giving me errors..
Private Sub Button4_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button4.Click
Dim ConnectionString As New ADODB.Connection
Dim rs2 As New ADODB.Recordset
[CODE]...
So I've made an dll file from an .vb file .dll file : Public Class ControlDigits
[Code]...
i just started programming using DAO recordsets and almost everything works great, most of what I did is database stuff.including movefirst and other stuff like that. But when my boss came and deleted everything in the database and clicked on movefirst i got an error that says no current record. is there any way for me to trap that error
Dim AccessEngine As New DBEngine
Dim db As Database = AccessEngine.OpenDatabase(DatabasePath)
Dim dbs As Microsoft.Office.Interop.Access.Dao.Recordset = db.OpenRecordset("myTable",
[code].....
why ( toolkit script manager ) the error is:
Could not load type 'System.Web.UI.ScriptReferenceBase' from assembly 'System.Web.Extensions, Version=3.5.0.0, Culture=neutral
I have the following asp:HyperLink which opens in ColorBox:[code]The above works fine if the Eval("album_name") is without space. The problem is when i have spaces the colorBox doesn't open. For example: delete_album_confirm.aspx?AlbumName=testing album cover& PhotoFilename=resized_ CIMG1426. jpg&AlbumID=41..Can anyone tell me how I can use spaces and still get this working?
View 2 RepliesI'm suppose to do an application as follows..I should dial a modem with Phone number using Gsm Modem. i Searched a lot in Google for some source/idea's in vb.net but i dint get .I have code in vb6.0 so I converted that in to vb.net. In that i'm getting errors correct my code.Here is my code.I'm fresher as well new to VB.net programming.Because of stress for urgent completion of work,not able to spend much time.
[Code]...
I want to catch all error handling without using try in each sub, since
View 8 RepliesI am making a vb.net program that calls several other subprograms. None of them effect the other.If there is an error in 1 of them, how do you record the error but continue on to the next subprogram with out stopping everything ?
View 1 RepliesI'm new to visual basic 2008 and have worked on this question for quite a bit before deciding to come to this website and asking for someone to walk me through it."Write a program that requests an amount of money as input and displays the names of all liquids for which a gallon could be purchased with that amount of money. The information in the (table 6.2) should be read from a file. As an example if the user has $2.35, then the following should be displayed in the list box: "You can purchase one gallon of any of the following liquids:Bleach Milk".[code]
View 1 RepliesI have a program that runs fine untill i build the app. then try to run it i get an error when it would be calling the second form. im not sure how to find the error since vb thinks the code is fine
View 2 RepliesI'm having problems moving some VB scripts that create web pages from a Windows 2003 server with no service packs to a new Windows 2003 server with SP2.If I go to the web page that calls the scripts on localhost, every thing runs fine.IfI go to another computer an bring up the web page, I get this error:
Microsoft VBScript runtime
error '800a0046'
Permission denied
[code].....
I am making a new application and now I want to make sure if I forgot to handle any errors that might occure I want to put in a handler to handle all the other unhandled error's.[code]...
View 12 RepliesHow can I make it so that when my Webbrowser returns an error - such as 404 or 407, it shows a web page of my choice like a webpage designed by me instead of the IE version?
View 1 Replies