Get Some Typicall Errors When Adding Or Deletting Rows For The First Time In A Datagridview?
Apr 17, 2009
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?
Problem: 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:
I am trying to code a DGV that can insert(update when row exists) and delete records. I use Visual Studio 2005, and code in VB.NET. I am using a MS SQL Database. Some pages i have tried but are either lacking in detail or what i need:
I am trying to Add multiple rows to a datagridview using the below code, but at the moment it only adds 1 row and when i click add again it overwrites the previous entry and not add a second row: Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim dt As New DataTable() dt.Columns.Add(New DataColumn("Make", GetType(String))) dt.Columns.Add(New DataColumn("Model", GetType(String))) [Code] ..... How do I manage to append the previous entry in the datagridview so multiple rows get added?
VB.NET 4.0 framework Windows Forms Application. So I have a DataGridView that I have dropped on my form in designer, set all the columns to readOnly, AllowUserToAddRows = FalseAllowUserToDeleteRows = False. Now for the part where it the code is going bad at.
My function Looks Like this: Private Sub fill_items() Dim prop As List(Of property_info) = db.property_info.ToList
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
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.
Present i am working on TreeView and Datagridview in VB.NET 2008. In the Treeview one of Node if i will expand, corresponding number of ChildNodes, i want to create same number of rows on the DataGridview.
Assume my treeview Control Nodes and ChildNodes like below.
I see the DataGridView control has a property "AllowUserToAddRows" that I can turn on or off but what if I want the ability to be context dependent. i.e. I want an event that will fire when the user attempts to add a row in which I can cancel if certain conditions aren't met but I can't find an appropriate event.
I am trying to insert an initial line (0) into a datagridview (named params). The program will then read each cell in that row, pass them through a function and return values be placed into the next line (1). This will continue until one of the parameters reaches some set point. The problem that I am having is that when I try to insert a new line, it appears above the initial one and not below it like I would like it to.
Here's my code so far: Private Sub HurricaneWinds_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load Dim init_xrange() As Double = New Double() {0.0, 0.0, 0.0, 40.0, 0.0} For i As Integer = 0 To 4 params(i, 0).Value = init_xrange(i) [Code] .....
I am having trouble adding a row to a databound datagridview on a parent form from a child form. I have two forms, one contains a datagridview that is bound to a table using 'datagridviewbindingsource' and contains an 'add' button. The second contains a checked listbox that is populated correctly and has a "Cancel" and an 'OK' button - when i check several items in the child form, i would like to hit okay and update the bindingsource of the datagridview on the first form with the checked items.
Code: in form1 when btnAdd is clicked dim f2 as new form2 'call it as a dialog to check for the cancel button f2.ShowDialog() [Code] .....
Its working for only single row.I got the Error Message is: "Index was out of range. Must be non-negative and less than the size of the collection. Parameter name: index"
Private Sub ViewButton_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles ViewButton.Click con = New SqlConnection(Constr) cmdstr = "Select * From Mcdaily where Mcno='" & McnoCombo.Text & "' and Day(Edate)=" & Dtlog.Value.Day & " and Month(Edate)=" & Dtlog.Value.Month & "" [Code] .....
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."
I've got a method that makes a request to a service that queries an SQL database, and then adds the result of the query in a datagridview row. I call that method in a "for each" loop.
It looks like this:
For each item in BigListContainingHundredofItems Dim rowdata As String = GetRowResult(item, SomeDatabaseConnectionString) Datagridview1.Rows.Add(rowdata) Next
Basically hundreds of inputs are sent to the "for each" loop, and the way I've written it now it becomes "Not Responding" until all the rows have been added to the form (I can see the scrollbar handle size shrinking, which means rows are getting added).But I'd like to know how to keep everything responsive, and I think multi-threading or background worker thread might be the solution. I just wanted to get some input/feedback from the community.
How would i delete only the successful inserted rows for insert and then move the non successful rows up and allow the user to correct the data and get it ready for an insert. If i dont delete the successful rows then i will have multiple inserts of the same dataRow and we dont want that! AND if i dont move the data up then it will have blank rows uptop and will end the try and not insert the corrected data. You can better see what logic i am trying to perform at the bottom of my code, right after I insert into the database. Here is my code.
Private Sub btnLaserGenerateTicket_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnLaserGenerateTicket.Click 'Function declarations
How would i delete only the successful inserted rows for insert and then move the non successful rows up and allow the user to correct the data and get it ready for an insert. If i dont delete the successful rows then i will have multiple inserts of the same dataRow and we dont want that! :) AND if i dont move the data up then it will have blank rows uptop and will end the try and not insert the corrected data. Here is my code.
how to add Rows programmatically to the DataGridView's rows collection when the control is data-bound? here is my code but i got error as "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound? "
switching back to the code causes an error dialog to pop up with the message:"An error was encountered during code generation.The changes you have made in the designer have not been committed to the source code.it is recommended that you close and reopen the source file.The error message follows: Error HRESULT E_FAIL has been returned from a call to a COM component."The source code the Designer
I'm trying to add the export to word capability to my code and adding the following to my code gets me some warning and errors. I was able to find a download sample code to do this, however it's strange, when I run the downloaded code, it didn't encounter error but I put this together with my code it produced some errors.
Option Explicit On Option Strict On Imports System.IO
After adding a string to the program from the resources the build always fails, and removing the string and the code to load the string does not solve the problem, as the build still fails. We've been using multiple versions of the program since this started happening with the most updated one, and adding the string is what started the failure in building even though we added other elements (like an exit button) and other forms without it failing. With the one that started with the build failures we've tried it on all types of computers and it does not manage to build on any of them, even one's with a new installation of Visual Basic Express 2010.
The exact line added that apparently makes the build fail is:
And the string added to the Resources isn't anything unusal compared ot the rest we have but it is this is:
The Stegmaier Brewery business began in 1857 when Charles Stegmaier first set up a shop. Since then the Stegmaier business has grown greatly. The size of their operation has grown from the original shop to the large building pictured to the left (opened in 1863 and purchased from Stegmaier in 1978). The Stegmaier Brewery Company was purchased in 1974 by Lion, Inc. and Stegmaier Beer is still produced today by Lion, Inc. and remains a popular choice among consumers.
I have a project that as a standalone runs perfectly. There are a number of routines, forms etc. that I want to incorporate into another solution that I have created. Each time I try, it will load in the new project, but if I try to access anything by clicking on it, one of two things happens, either VS crashes and then restarts OR I get 100+ designer errors thrown.
been racking my brains on this one for a long time, and I've finally decided to ask the question. I had sevaral fields on a vb.net form which need to come together
I finish to makethe forms and the code of my project, but when I try to make the executable file it shows errors about some forms that I created as test but I deleted so I wonder where I need to go to take them out and try to build again my executable smoothly?Example: Unable to open module file :'C:....CrystalReport2.vb': The system cannot find the file specifiedNote: That CrystalReport file was eliminated because I didn't need it.
I have a form that i want to be saved to my database. The form is adding a new record to my sql server 2005 database but it is not bringing the text over with it. The new record in my db is just an empty row. Here is my code.Add to database section ( i have removed the connectionstring for privacy reasons)
<%@ Page aspcompat="true" Debug="true" %> <html> <head> <title>Form to database</title>
I am trying to create what I am sure is a simple program to add hours to convert UTC time. I want to type in a UTC time and have it convert for every state in Australia. [Code] Now that works fine however when the conversion goes past "midnight" it then shows the date and time. I have tried about 50 different things but cannot get it to remove the date when the converted time passes midnight. [Code] The string was not recognized as a valid DateTime. There is an unknown word starting at index 18.
Can anyone tell me why "Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound." I keep getting an error "Invalid Operation Exception was Unhandled" error. All I am attempting to do is allow the user to select products from a list(or a second datagridview) and have it added to the datagridview so they do not have to type in every cell since the other cells are not visible because they do not purtain to their needs. Plus they will be able to save all items at the same time.
It was even difficult coming up with a Question title for this.
Am not sure whether am using the right approach to my problem. See i have this datagridview that contains rows that i would like have saved back into the Database as new rows but with a column altered to a new value.
Eg
PKColumn1 FKColumn2 Column3 Column4 1 1
[Code].....
What am looking at is Change FKColumn2 (some foreign key, maybe i can also have a combo box somewhere on the form and an "import to") values to something like 2 and save the rows back to the database without loosing the original rows.
