My current problem is this:I have a form and I have in it three textboxes, 1 button and 1 datagridview; I also have an acceI'm learnig now on how to create a report without a database. But In how to set the datagriview as the datasource for my report
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I have a datagridview bound to a datatable setting its datasource property to the datatable. I would like to have a child form that contains a list of columns associated with the datatable that contains a checkbox that will allow the user to hide and show the columns ( I do not know the best control to use here) (I assume this is the easy part as All i need to do is loop through each of the datatable's columns to get the column name)
now I would like save these visible columns on some event like form_closing so that the next time the user opens the form up it will remember the settings
I have a gridview. Its datasource is set as follows.dtTable is a datable in which the values for the table will be retrieved. But when setting dtTable as datasource I get an error "Object reference not set to an instance of an object". What may be the reason for this?
gridview.Datasource = dtTable
gridview.Databind()
I am kind of an old 'newbee' at this, so bear with me for a moment. I am developing a windows forms application in Visual Studio 2010 Professional that connects to a remote database (MS sqlServer 2008 R2).To speed up development, I configured a DataSource and used the data objects associated with it. In VB6,
the data source could be assigned to the data objects during runtime using a variety of different runtime database connections, ODBC, ADO, ...
I have been unable to find a similar method with the VS2010 Visual Basic DataSource and underlying TableAdapter, BindingSource, BindingNavigator, down to the individual ComboBox and assorted other bound controls. It's convenient to have the integration, but I've got different users with different permissions, The long and short is that I'd like to be able to assign the data source during runtime operation, at least to the connection string level.
I want to maintain a list of potential ComboBox values over multiple executions of my program, and to use that list as the DataSource on multiple ComboBoxes. I also want changes made to the DataSource to propagate over all of the ComboBoxes already existing in the application.
Can someone recommend what type of object I should use as my DataSource, as My.Settings objects don't seem to support generic list objects.
Also, along with that recommendation, can I also ask for suggestions as to how to propagate the updates of the collection to all ComboBoxes? I would imagine I need a collection type which raises events when its contents change, but I can't think of any, and in any case do not know which are compatible with My.Settings.
In VS2008 we have menu Report->Data Sources... which opens "Report Data Sources" from here we can see Project data sources & we can add them into our report by pressing "Add to Report".but in VS2010 RC there is no such thing like this (no Data Sources... option inside Report menu)
View 1 RepliesI have a small requirement and that is as follows:
I am populating a ListBox using stored procedures and the ListBox is populated as follows:
lstItems.DisplayMember = "emp_name"
lstItems.ValueMember = "login_id"
lstItems.DataSource = accessFunction.getEmployees
The ListBox gets populated correctly. After it is populated, i have a CommandButton and on the click event of the button, i want to remove selected items from the ListBox. So in the click event of the CommandButton, i have written the following code:
lstItems.Items.Remove(lstItems.SelectedItem)
After selecting an item from the ListBox and when i click the CommandButton, i get an error as "Items collection cannot be modified when the DataSource property is set".
how i can delete items from the ListBox.
[code]My question is how can I remove xStopBits(0) before setting the DataSource?To get around this I currently have a check in the ComboBox1_SelectedIndexChanged event.
View 14 RepliesI have a datagridview that is populated using an oledbconnection:
Private Sub FileSpecs_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim cn As OleDbConnection = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & My.Settings.DBLocation & ";")Dim cmd As OleDbCommand = New OleDbCommand("SELECT specFieldno AS [Field No],specFieldName AS [Field Name], specFieldType FROM fileSpecs WHERE ClientNo='" & ClientSetup.clientNo.Text & "' AND direction=" & ClientSetup.fileDir, cn)
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The problem I now face is that the 'index' value of the combobox item for each row is in the field specFieldType which is populated into the datagrid.I need to be able to set the value of the ComboBox for each row when the form is opened, and also be able to save the index value of each row selection if any changes are made/saved.
I have to change my sql server and need to point all my crystal reports to that new server at runtime, some reports has StoredProcedures embeded inside and those are the problems.[code]....
View 2 RepliesI'm trying to open a crystal report and have the datasource to be a data set but i'm having some problems. here's what I got so far:
My application is using a sqlCe database. On form1, I dragged the dataset, from the datasource tab, onto the form. when the user clicks a button on form1, this is called:
Dim rpt As New WorkLink_Application() 'The report you created.
Dim MyCommand As New SqlCeCommand()
Dim myDA As New SqlCeDataAdapter()
[Code].....
on the crystal report, i went through the database expert wizard and selected the dataset from Create New Connection-->ADO.Net. I then dragged a field from my table onto the report. When the report is opened, though, the field is not shown.
I 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".
I have an RDLC report that I am rendering directly to the Response Stream as PDF (rather than using the ReportViewer). In the code that renders the report, it's DataSource is bound to a List(Of ClassA) objects defined in a custom assembly. This seems to work for the most part. My problem is that I can't seem to handle the situation where a nested object is null. For example, given ClassA and ClassB (the nested object) defined as follows:
Public Class ClassA
Public Id As Integer
Public Name As String
[Code]....
the report displays "#Error" if TheNestedObject is null. If TheNestedObject is not null, it correctly displays the Name.
My application must display some data in Datagridview (status of COM ports communication) and i Used .mdb databases before for faster search and Datagridview update. How i understand Datagridview is importing data from DataTable and data in DataTable is imported from .mdb file, so i decided to make shortcut - stop to using .mdb file (data must be erased every time application start and it is useless make .mdb file and erase it every time, becouse it is increasing even when drop is used) and using only DataTable..
I want to row in Datagridview change it color to red when it's Collumn(6).text countains %error% string..
When Error in COM port is starting, i can fast find row in DataTable for that port and write information that Error accured for that port and DataGridview automatically updates:
Dim RRow as () DataRow
RRow = ds.Select("Port = 'COM3')
RRow(0).Item(6) = "Error Opening COM3"
Can I set custom paper size in my crystal report? For example, i want to show 8.5X5.5.
View 4 RepliesI need to print the bill and the paper size is 204 by 152 mm and its a continous paper. i did write the code as follows [code]i have done enough research but came with nothing thats why m posting here.I just need how to set custom paper size to crystal report.
View 7 RepliesHow I can set a Textbox or the report header title programmatically at runtime?
Like as in a form - Me.text = "Sales Report"
Depending on how I query the report I'd like to give the report a descriptive report name.
in Crystal reports ( crystalreport1 )how can i change the textbox text in report header ( say for Eg textbox3 ) to some thing of my own,during run time for visualization i can say, i need to set the report header textbox that states the report filtered date, which can be set while the run time only
View 4 RepliesColumns 0 & 1 are filled from a DataAdapter from Access Database and three are added. I had this working, but I changed it to check for the column "Feed" so I could add several Locations. At first this worked,but I did someething in perfecting it and it now fails after filling the first row of the datagridview (dgvFdMed).I ran a check and the table LotsTab has 8 rows filled. Column 1 & 2 are strings and the database appears they are fine. The added columns have just been created with no value. My plan is to enter the values and then use the data from the grid.
Private Sub sfillGrid(ByVal Loc As String)
Dim i As Integer
Dim column As DataGridViewColumn
[code]....
I have created custom paper Size "XPaperSize 15 x 12" in Printers - File - Sever Properties. In VB .net 2005 I am trying to set custom Paper Size for Crystal Report. My problem is when I run report from Vb .net, Crystal report viewer showing correct preview for custom paper size but when I give print command it's print default printer paper size e.g. Letter size.
Here's the code I'm using to print:
Dim ObjCrReport as new ReportDocument
ObjCrReport.SetDataSource(ObjPrintDataSet.Tables("PrintData"))
SetReportPageSize("XPaperSize 15 x 12", 1) ' call Procedure for setting Custom Paper Size
End Sub
[Code] .....
If I used "myAppPrintOptions.PaperSize = PaperSize.PaperLegal" then print preview & Printing coming correct. Why it's printing Letter Size where Crystal preview showing custom paper size preview? & How to set Crystal Report Printer Paper Size?
When I try to change the datasource of my DataGridView, I am loosing the order of the columns and their type(checkboxes,comboboxes) that i specified on designtime! It's like changing the datasource is generating again the datagridview, why ? and How can I change the datasource without losing these information ? on form load i do something like
Private Sub frmGrid_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim Path as string
[Code].....
I have created a Datagridview by dropping in from the Datasource. After I changed one column to be a Checkboxcolumn but it does not represent the values. In the table (smallint) I have 0s and -1s but it doesnt matter what I enter as True and False Value in the column it just shows that the box is checked.
View 5 RepliesI have a DataGridView and in it a CheckBoxColumn, when I click a cell of that column the check box gets checked.I do it like this:
dgvMessages.CurrentRow.DataBoundItem("have_read") = 1
but the change does not get committed to the DataSource (or at least not immediately), so when I search through it I get wrong results.
I can't call AcceptChanges as that will refresh the grid and cause unwanted side effects... What can I do about this? Is there such a thing as an 'AutoCommit' property on a DataGridView?
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?
I simply cannot understand or see when a DGV's DataSource (a DataTable in my case) get's updated when a new row has been added to the DGV by the user. I have looked at row counts in the DataTable at every possible event and cannot "get" the correct number of rows (which I ultimately need to "get" the GetChanges(DataRowState.Added) of the DataTable.So, here's what I've done.1. The DGV is populated on the FormLoad event. It includes a ComboBoxColumn which has it's own datasource. All fine.Now, let's say initially there is 1 single row in the DGV. There is also and "empty" row at the bottom of the DGV, all cell values are empty.if the user Clicks the ComboBoxCol and chooses an item, then this actually creates a NEW friggin' row, RIGHT?!No. Not exactly. At least NOT in the DataTable (The DGV's datasource).I attempted to "check". Looked at the editingComboBox_SelectionChangeCommitted event:
Private Sub editingComboBox_SelectionChangeCommitted(ByVal sender As Object, ByVal e As System.EventArgs) _
Handles editingComboBox.SelectionChangeCommitted
Dim rct As Integer = ImprovementsEntity.improvementTable.Rows.Count
[code]....
I have an app that has a DataGridView with a few buttons. My intent is to have the DataGridView populate with the data associated with the button clicked. So if you click the States button it'll fill the DataGridView with the DataSet I have created with a link to a SQL table with a list of States.
View 7 RepliesI'm working on VB .NET 2008.
Target: Bind dynamic datasource in a cell of a Windows.Forms.DataGridView depending on the selection in previous column. The grid must have 7 columns. If the selection on comboboxcolumn 2 or 4 is done, the datasource of comboboxcolumns 3 and 5 mus change using a query with previous selection as parameter.
In a first try to develop this functionality i've tried to use Telerik.WinControls.UI.RadGridView control. I've created a customized celltemplate with a combobox in order to have different datasource for each cell on the same column. All worked fine but seems to be some kind of bug in RadGridView, because when the combobox is presenting the list, after selection the list continued showing, doesn't dissapears as expected.
Ok, after several days of fight with RadGridView, I give up, and I tried to use same strategy but using Windows.Forms.DataGridView. I've created two classes one inherited from DataGridViewComboboxCell and other from ComboBoxColumn, in order to insert my own combbox or have the chance to have access directly to the combobox values. But the combobox showed is the default combobox not my own combobox.
how can I create a custom comboboxcell but using my own combo, and having access from outside to this combo?
public Enum ClaimStatus
Ongoing = 0
Completed = 1
[Code]....
With code above, how do I assign the value to the combobox while retrieving data from the table so that it point to the corresponding combobox item. For example, if the value of status_ID is 1 then the combobox should show "completed" in the datagridview.
I have a datagridview with a datatable in a dataset as a datasource. When i add a new row in the datagridview it is automaticaly added to the to the underliyng datatable (its datasource) . However it will only be addad after i click another datagridviewrow. I would like that update to be just after i added the row or after i edit one of its cells and not only after i click a different row.
View 8 RepliesPosted this over at WinForms forum, just not much activity and thought I might get a quick response here....Not real certain if I am implementing this correctly, but I am attempting to programatically modify cell values in a DataGridView control with an underlying DataTable as it's DataSource.
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