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.
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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:
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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
[code]....
I have an unbound datagridview, the datagridviews columns count may very depending on how many are needed like so
For i = 1 To myColumn
Dim RP As DataGridViewColumn = New DataGridViewCheckBoxColumn
RP.AutoSizeMode = DataGridViewAutoSizeColumnMode.None
[Code]...
The problem with this is that it puts everything in the first column instead of each column.
What I was trying was to have it place each value into its own column.
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.
View 2 RepliesAs a preface, I am brand new to using SQL Server 2005; I know how to use the SELECT, UPDATE, DELETE, and INSERT commands and that's about it. I am also using Express Edition on my local PC (E8400 processor, 8GB of DDR2-800, 2 x 640GB SATA-II HDD in RAID 1)
I have a table that I set up with 8 columns, all are NVARCHAR(Max) and I allow Null. I know in concept what a primary key is, but I don't have one (nor do I know how to set one up).
My VB.NET program that I'm working on is downloading a historical stock price chart from Yahoo, for every single ticker symbol in existence. The first 50,000 rows or so I added was super fast. Then I went to bed, and when I woke up it was still running - but the rate of row additions has slowed waaaaaay down; I noticed this around row 300,000. I always expected the rate of row addition to be constant over time, but obviously this is not so!
From browsing other Stack Overflow questions, I suspect my slow down is related to my piss-poor table setup. If this is the case, where should I begin first to fix this, and are there any good resources I could read up on to get started? I'm hoping this is something simple I can fix [code]....
I created a reporting utility for my users to view, send (via email), export SSRS reports. I have set up date parameter boxes with calendar drop down and they are able to send via email a URL link that would either display the report via ReportViewer or send a link that would let then view the report in Excel or PDF. This is working just fine. Now I just added a button for adding new email addresses and a new windows form with a textbox for entering the email address and a command button for Save Email Address. I get an error msg Quote: Objects added to a BindingSource's list must all be of the same type.[code]
View 5 RepliesPresent 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.
-31
3101
3102
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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 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 RepliesI 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] .....
with a Unbound datagridview how to add a row at a specific location say for example after row 8 i want to add a row.
View 2 Replieshow do I count all non-new rows in a datagridview?
datagridview always give a blank row at the last row, and when i do a rows.count, it always adds up
is there a way to count only non new rows, or do i just need to subtract 1 every count (which is weird)
Is it possible to show columns as rows and rows as columns in DGV? If yes, how it can be done?
View 2 RepliesI am loading data from a Textfile into a datagridview. I want to limit the amount of rows created at any stage to 9. How can i do this?
View 2 RepliesI had a DataGridView in which i want to fetch the data from the access database,so i did this
Dim connString As String = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Etech.mdb"
Dim myConnection As OleDbConnection = New OleDbConnection
myConnection.ConnectionString = connString
[Code]...
In the above snapshot,after fetching the data from the access database to the DataGridView,i want to remove the PplicyHolderName,PremiumAmount and a few other columns since these are the columns which do not contain any data....
I'm trying to populate a datagridview with rows in the sqlserver 2005.how to use DataAdapters too well so I go back and forth between hard code and controls.I used the Datagridview control and added columns to it this way. 2 combo boxes, a check box, and 2 text boxes.The 2 combo boxes are populated with values that are already in sql Server for users to pick from. The task is displaying the description while the value is the task_ID. Here is my form on load:
Private Sub frmTimeSheet_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
currentDate = Date.Now.ToShortDateString
lblDate.Text = currentDate
[code]....
i want to save into my sql server 2000 database multiples rows of a datagridview. i tryed something that first was working good, but i did a code change removing a column so now i'm trying to save again but i can't do it. It's shows me a message error like this: THERE ARE FEWER COLUMNS IN THE INSERT STATEMENT THAN VALUES ESPECIFIED IN THE VALUES CLAUSE. I rewrite the code, delete and add a new table and my code has the same values in the insert than my values clause. I don't know what else i have to do.
Here is my code
Private Sub cmdAceptar_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdAceptar.Click
Try
[Code]....
I have a datagridview control. I want to save the rows and then restore them the next time I run the program.
How do I write the rows out to an XML file?
I know how to fill the rows from an XML file. But when I've done so I can't add any more rows. It gives the following exception when I try: Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound. What can I do about this?
Or is there an easier way to save and restore the rows?
VB6 had a feature for it's datagrid where the user could use the mouse to drag the row divider in a datagrid and when the user released the mouse button, all the rows in the datagrid would resize to match the one the user resized (Excel does the same thing if you have all rows highlighted).
View 11 RepliesI 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."
View 2 RepliesHow to display datagridview with default six blank rows and two columns.
View 4 RepliesI have added an unbound checkbox column to my DGV. I have two questions on handling it:
1. How to have a checkbox on this Column header, which on checking must check all the rows in the DGV and vice versa?
2. How do i get the Boolean value of the checked rows in DGV on event handling? In other words, how do i know what rows are selected?
I am a student working on a project for my company. I work using Microsoft Visual Studio 2005. Language is vb.net. I also work using windows application.
I have a form(EmailContacts.vb) which contains a datagridview and a button(btnAdd) to add the data to a textbox of another form. My datagridview consist of 3 columns; CustName, Email and Selection. Selection column being the column with all the checkboxes. Everything is working fine and i can display data from the database on the datagridview properly.
The problem is how do i add a 'Select All' feature such that when the user clicked once on the 'Select All' checkbox, all the checkboxes in the 'Selection' column are selected?
These are my codes for the form:-
[Code]....
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.
All fields from my class objects are added to the columns collection of DataGridViews, when the forms or custom controls that contain them are viewed within the VS 2005 designer. I haven't been able to figure out how to stop the designer from auto-adding all of the fields found within the bindingsource object.
View 6 RepliesIs there a way to make a DataGridView's column a combo ONLY in the "new row", and a read only textbox in all other rows? I want the user to be able to make a selection from the combo box, and when the row is finished and the "new row" moves down one, I want the column to become a textbox containing the what the user selected. My grid will be bound to a table witch contains a "category" column, that is drawn from a seccond table that i want the combo box bound to.
View 1 RepliesHow 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
[code]....
