IndexOutOfRange From Datagridview When Refreshing Dataset?
Oct 6, 2010
I have a datagridview on a form that is bound to a table in a dataset from another class.I use a data adapter to .Fill a table in that dataset and the grid displays the data fine.Works fine.On my form I have a textbox the user can type in that will will pass a parameter to the storedprocedure used to fill this table. So on startup the textbox will have "%" in it. and then the user can type in "F%" and get everything that starts with an "F"
So when that textbox changes I launch an async refresh (.BeginInvoke) to do my refresh. The table gets populated with the reduced number of records (I check ds.table(0).rows.count and it is correct)
But the datagridview then starts throwing datagridview.dataerror events. "System.IndexOutofRangeException : Index # does not have a value".It looks like the dataset is getting filled correctly and not having any issues, but the datagrid is not liking this update. The index out of range error is so common that I'm not finding what I need through searches.
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May 4, 2011
I'm working on a punch-card type program and I'm designing a password change form, so that employees can set their password whenever they first log in, or whenever their password is reset.
The Program works like this: (Code to follow)
1) User starts application
2) User types in their username, and then enters their username as the password. (first time the program is ever run.)
3) The password change form appears, and they enter their desired password in two text fields and clicks OK.
4) The punch-clock form appears, and they begin using it like normal.
The problem I'm having is that at the end of step 3, the program updates an access database, changing the row with the correct username to have the new password. The password in the database changes, like it should, but when the application is exited and then started again, it acts as if the username is still the password.
Below is the code I'm using for the Login Form, the bottom section is a user class that I built just to hold username and password for the logged in user.
Public Class LoginForm
'Creates a new object to house the logged in user's information
Public persona As New User
[Code].....
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Jul 26, 2010
I have a form that uses a tab control. On the main tab is a DataGridView containing Customer information. If I double-click on a row in that DGV, I go to another tab in which I can either make changes or delete the record. Whatever I do, whether it be delete it or modify it, after clicking on the appropriate command button, focus goes back to the main tab. What I wish to do is have the changes be reflected on that DGV. If the record is deleted then I want the DGV to not have that record present. This DGV is bound to a BindingSource. What control/dataset to I need to "Refresh" in order for this to happen?
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Jun 12, 2011
I need to "refresh" a DataGridView, bound to a database table, on a form within a TabControl The DataGridView is loaded correctly on strartup... But if the data in the DataBase change, How do I refresh it to reflect new records or updates?
this is what I am doing in code, after looking for some examples on the web:
MyTabBindingSource.EndEdit()
Me.MyTableAdapter.ClearBeforeFill = True
Me.MyTableAdapter.Fill(Me.MyDataSet.MyTable)
[Code]....
but nothing changes at all...Do I need to refresh/repaint the TabControl as well as th Form containing it? or what else??
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Sep 11, 2010
I have a datagridview control on my form which i have populated it with values from a dataset. Now i am using a button to delete these values from the database which is working perfectly for me but the problem now is anytime i delete the old value still shows in the datagrid which shouldn't be so so i wrote the code to refresh the grid after deleting but is still not working for me as i want.
I am using this code:
Me.UserAccountsDataGridView1.Refresh()
But onething is the value i deleted doesn't show when the form reloads again. but at run time it still has the old value in it again.
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Jan 24, 2011
I am trying to refresh a datagridview from a second form to display newly written data. I have read the posts on this topic and can't figure mine out. My first form opens and you input data into text fields, etc. and then you need to select items from one table to copy and write to a new table. The datgridview on the first form shows the new table, and I have a new form that pops up to select the line items to add. Everything works perfectly except when I close the selection form after selecting lines, I would like the datgridview on the first form to refresh to show that the lines have been selected and displayed in the datagrid.
My data is loaded into the datagridview as so;
Public
Sub ShowVoucherLines()
cmd =
[Code]......
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Apr 20, 2010
I am attempting to refresh my datagridview but it does not seem to work. I have a separate frm where people insert data, and then I have a button on the main frm where people can click refresh once the other frm is closed. I click refresh and yet the data does not update in the datagridview
Private
Sub
KryptonButton3_Click_1(ByVal
sender As
[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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Oct 13, 2011
I'm facing a problem with a datagridview datasorce, or refreshing it. I'll try to explain what is happening. So I have a datagridview called dgvMaterials, I'm binding datasorce to the datagridview from one table in mySQL server. Here is the code:
Dim ds As New DataSet
Private Sub frmSettings_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code].....
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Jun 11, 2010
Dim myQuery = "UPDATE table1 SET data= CONCAT (data,'" & vbCrLf & "[ " & Date.Now() & " ]" & " " & "[" & getCN() & "]" & " " & txtTelenotes.Text & "[ item1 ]" & "') WHERE id='" & txtID.Text & "'"
[code].....
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Mar 12, 2011
I have a DataGridView bound to a datatable which comes from an SQL Server database.When the user edits a record my update statement changes the field datetimemodified to reflect the last date and time the record was edited (as stored procedure). The new value for datetimemodified is not brought into my DataGridView.
1) How do I refresh a DataGridView bound to a DataTable? Is there any way to refresh or resync only records that have changed instead of the entire DataTable? (Note: my update statement is working fine. I'm only wondering about refreshing the DataGridView.)
2) Would it be better to change the value of DateTimeModified on the client side so that I can avoid a refresh (assuming that this is the only reason I need to refresh the data)?
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Mar 28, 2011
I have a Data Grid View that is attached to a binding source. The binding source is pulling from an SQL database. The form I'm creating has a bunch of text boxes and then a record button which records the information back into the sql database. After the record button is pushed I want to have the datagridview pull the data again from the SQL database to pickup the new information. The BS has another BS for its data source, the other BS has another BS for its data source. That final BS has the DataSet for its data source....
BS3 --> BS2 --> BS1 --> DataSet...?
The .refresh for the datagridview does not pull in the information. I do have a filter applied to the binding source that the data gridview is pulling from.
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Mar 5, 2011
the Datagridview is included in first tabpage. first tabpage is the search form and the second tabpage is the record detail view. user is switching and working between those two continuously.
The problem is that everytime user selects the tabpage1 the datagridview repaints itself. there is about 6000 rows in datagridview so it takes about 2-3 sec to paint itself. I know the delay is normal and can't avoid that. but it affects the tabpage selection. tabpage1 isn't selected completely until the Datagridview1 finishes it job. in this time the tabpage1 and tabpage2 gets combined and confused.
is there a way to put datagridview processing in backgroundworker or something that doesn't affect main UI ?
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Oct 13, 2010
I am getting an IndexOutofRange exception when using a datatable. Here is the code: Dim DR As DataRow = DT.Select(String.Format(SelectString, Val1, Val2, Val3, Val4))(0)
The select should find a record to match - I used debug to verify the format string substitutions and there are matching values in a record in the datatable. So how can I determine the value of the index error?
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Dec 16, 2010
i dont understand what this means. im not using an array as far as i can tell. i am in a vb class and wou. here is my
Public Class frmMain
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
[code].....
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Dec 14, 2010
I have created in Visual Basic .net a new DataGridView in my form. I have used the wizard to show some fields of a table in my access database.I would like to add a refresh button and force the datagrid to load the data again from the database, but I'm not sure how to do that. I have tried several refresh method but it does not work.
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Mar 1, 2012
Im making scraper that should get values with regex to datagrid, but after getting first value, it doesnt update datagrid untill I click there or use ctrl + a to select all.
[Code]...
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Jun 13, 2012
I have a combobox bound to a dataset. I want the combobox to update when changes are made to the dataset.I thought i read soewhere that it is supposed to do that on its own when bound to a dataset but I don't see it happening.Now I am having to refill the combobox from the updated dataset.Is there a way to get that to work?
Code: Public Sub FillDomainDropdown() DomainDropdownDS.ReadXml(My.Settings.DomainDropDownList)
some code here that remove certian rows based on other conditions
With ComboBox1 .DataSource = DomainDropdownDS.Tables(DomainDDTableName) .DisplayMember = "Name" .ValueMember = "Name" End With End Sub
Then if the user makes changes I then call the above sub (from another form someone clicks "done") again to then refill the DS based on the new conditions.so it may add/delete rows from the DS and then fill it. But when its is called from the other class it does not 'refill'
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Nov 10, 2011
I have a DataGridView on FormA and a DataGridView on FormB. The DataGridView on FormA is initially populated from a file. This same file is being reused when data is saved from either form.
What works: I show FormB by clicking a button (control) located on FormA and all of the data that is in FormA's DataGridView is read into the one on FormB from the file. I can make changes to the DataGridView on FormB and save back to the file but when I close FormB, the data on FormA remains the same as originally read in.
What is needed: If I make changes on FormB, what is the best way to refresh the DataGridView on FormA when I return to it? FormB is closed at this point. I tried to include a call (as the last statement) in the button control on FormA to read the data from the file again as this works initially but nothing happens.
Note: the FormA's DataGridView is also in a Tab control if this makes any difference to try and get it to refresh.
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Jun 22, 2011
i want to add the last row of the dataset but it is only displaying System.Data.DataRow in one of the colums
con.Open()
cmd = New SqlClient.SqlCommand("select product,Quantity,MRP,Sale_Rate,Disc_Amt,Amt from sale_table ", con)
[code].....
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Jan 27, 2009
I have a datagridview that is linked to a bindingsource....which is linked to a table in a dataset. (and i have tried it with the datagridview linked to the dataset and table directly).
When i make edis to the datagridview, and check the DataSet.Haschanges, it returns false.[code]...
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Apr 28, 2011
is it possible to add two defferent datatable (single dataset) into datagridview? what I mean?I have a datagridview and one dataset with two datatable. here on the datagridview, I have 3 columns on datagrid as (code, name and unit (combobox)) first two from table 1 and 3rd from table2. there is relation between table1 and 2 (code). so, in combo, I have to fill the unit depents the column1 (code).
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Jul 28, 2010
I have data that I'm taking from an Excel sheet with the ultimate goal of displaying in a DataGridView.
Currently I am just going over the UsedRange of excel data and plugging it into a datagridview. This works fine, but can get bogged down when there 100+ rows of data.
I have also toyed with going from excel into a dataset (using the same wasteful method), and as expected it takes about the same time to load the data. Maybe use the XML from the Excel file?
EDIT:
Some Additional Information:
This is a WinForms application and the user will be picking and loading the excel file at run-time.
EDIT
The Return of Some Additional Information:
The Excel file is located on the user's pc. The general assumption is that they will be loading different files each time they use the application. [not sure if this helps, but might be good to know :)]
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Apr 9, 2012
Okay so I have a datagridview that is bound to a dataset. I have a column called type is a string char of either C, R, A, or V. The problem is that I want to sort the datagridview rows using that column and do so in the order I just gave so I want rows with C on top and then R and then A and then V. Because these aren't alphabetical, how could I sort the items this way? I did look into the icomparer, but really wasn't able to figure out how that works.
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Jan 13, 2012
my question is, is there a way to filter records in the dataset and use that records to fill in the datagridview? for example, a datatable (with 3 columns: ID, StudentName, Gender) is filled with list of students. i have two datagrids in the form namely DatagridView1 and Datagridview2. DatagridView1 is where the the list of student where Gender is equal to M and DatagridView2 is where the the list of student where Gender is equal to F.in my current solution, i am using a loop.
[code]...
is there a way without using a loop?
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Apr 22, 2010
I have a data bound datagridview where I am allowed to add and delete rows.So a new row is the last row in the grid with the '*'. When a user starts to type in the new row, that row no longer is considered the new row. It is then inserted into a row above the new row (*). The user, however, can press 'Esc' key and this row gets deleted.If the user does not pressed 'Esc' but move the cursor along that row, this row will be permanently there. I have tested this scenario and check the underlying dataset and it registers no changes as in the myDataset.hasChanges=FALSE.If I call myDataAdapter.Update(myDataSet), nothing gets updated. How do I save this row to the database?
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Jan 19, 2011
I am not sure why my dataset is not being posted into datagridview
Sub to load the form and datagrid view
Private Sub btnMueME_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnMueME.Click
[Code].....
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Jul 5, 2009
this code that i use just update the datagridview not update at dataset..anyone can tell me what wrong with my code.
Dim mResult
Dim ObjConnection As New SqlConnection()
mResult = MsgBox("Are sure want Update this record?", _
[Code].....
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Feb 23, 2012
I have a DataGridView with 4 columns which I transfer toa dataset - this works fine, i posted the code belowHowever I adde a CalendarColumn into my DataGridView but this doesnt transfer over to my dataset.Does anyone know how I can add this Calendar column onto my dataset along with the other 4 columns?
Dim col As New CalendarColumn()
Me.dataGridView1.Columns.Add(col)
Me.dataGridView1.Name = "Trip Date"
[code].....
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Jun 10, 2009
I have a datagridview that was bound using the wizard and all the column created that way. So I haven't done any code to bind the datagridview. It will pull the data from the database and dataset just fine. My problem is when I create a new row it won't update the dataset or database. I have tried different ways that I thought it would work in the code and still haven't found a usable way to do it yet. Or if I need to do all my binding and columns through code give me an idea where to start if I have to go that route. This is my first experiences with Datagridview. I normally use comboboxes and textboxes to write to a dataset and database which all work very well.
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