I used this code:
myCommand = New SqlComman("SELECT RackName FROM tblRack", myConnection)
myAdapter = New SqlDataAdapter(myCommand)
myAdapter.Fill(myDataSet, "tblRack")
cboRack.DataSource = myDataSet.Tables(0)
then in the combobox i got the display "System.Data.DataRowView".
I got the System.Data.DataRowView when I tried to select the data from sql database. These are my code:
......
myCommand = New SqlCommand("SELECT FirstName +' '+ LastName FROM tblVisitor", myConnection)
myAdapter = New SqlDataAdapter(myCommand)
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I have a problem when i add new data then when i choose course in combobox example i will choose items in combobox "Bachelor of Science Information Technology" then when i save. then the result in course is "System.Data.DataRowView". What should be the correct Codes?
View 6 RepliesIm getting that error in the da.Fill(ds)
Imports System.IO Imports System.Data.SqlClient
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Im using datagridview in asp.net.When im trying to add row using footer template in find error coming up.I have corrected syntax and column is in Database.
<ItemTemplate>
<asp:Label ID="lblMembershipName" runat="server" width ="150px" **Text='<%# Eval("MembershipName")%>' >** </asp:Label> </ItemTemplate> <EditItemTemplate>
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Im using datagridview in asp.net.When im trying to add row using footer template in find error coming up.I have corrected syntax and column is in Database.
<ItemTemplate>
<asp:Label ID="lblMembershipName" runat="server" width ="150px" **Text='<%# Eval("MembershipName")%>' >** </asp:Label> </ItemTemplate> <EditItemTemplate>
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I've got an xml file that i'm trying to bind to a combo box. i'm trying to save the selected value of the combo to another text box. when my form initially loads, the text box shows System.Data.DataRowView instead of the currently selected value.i've read on other posts that this can happen if you don't have the right column names specified. but i'm pretty sure that's not my problem... because i'm not using string values for names, but referencing them by index. also, the actual combo boxes do display the list of values.[code]...
View 3 RepliesI have two checkedlistboxes (chkLB_Sentinel and chkLB_Scourge) binded to my database.I have a listbox (LBPlayers) with 10 players in it (0 To 9) which I fill using the items checked in the checkedlistboxes and the display member is Nickname.Whenever I want a msgbox to popup containing the first player which is 0, I'm recieving the msgbox "System.Data.DataRowView"
I have this simple code:
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim con As New SqlClient.SqlConnection
con.ConnectionString = My.Settings.MyConnectionString
[code]....
The problem is if I write the msgbox without .toString I get an error "cannot convert to prompt" so I'm obliged to put .toString Why am I getting this kind of error even if I have the DisplayMember binded and how can I fix it ?
I'm populating a custom dropdown list control on the fly that's tied to data grid using VB .NET 2008. The form will display all the manufactures when the edit button on the data grid is selected.
The dropdown I created works fine. However, when I try to populate the drop down with the respected manufacture values from the database, I only get a value of "System.Data.DataRowView" that being populated in the dropdown list as opposed to my values from the database.
Here's the basic code I use to first create and populate the drop down control:
<asp:DropDownList ID="Manufacturedd" Runat="server" DataSource='<%# m_ItrackerData.Tables("Misc_Manufacture") %>' SelectedIndex='<%# getSelectedManufacture(DataBinder.Eval(Container, "DataItem.Manufacture"))
%>'></asp:DropDownList>
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I have 2 forms, frm1 and frm2. frm1 has a combobox, cboLocations and based on what selection is made here, frm2 is loaded and its combobox, cboOffices is populated. I currently have the following code on frm1:
Dim frm2 as New form(cboLocations.SelectedValue.ToString)
frm2.ShowDialog()
When running, I'm getting an InvalidCastException was unhandled...Conversion from string "System.DataDataRowView" to type 'Integer' is not valid." error.
I have 2 forms, frm1 and frm2. frm1 has a combobox, cboLocations and based on what selection is made here, frm2 is loaded and its combobox, cboOffices is populated. I currently have the following code on frm1:
Dim frm2 as New form(cboLocations.SelectedValue.ToString)
frm2.ShowDialog()
When running, I'm getting an InvalidCastException was unhandled...Conversion from string "System.DataDataRowView" to type 'Integer' is not valid." error.
I have 2 comboboxes who are loaded on the formload event with the folloving
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I have tried everything I can to get beyond this error which shows below as <<<<< error here. It is trying to fill a dataset from a data adapter. If I change the SELECT statement to just SELECT * FROM xTable I get the correct number of records in each table. But anytime I try with a more complex statement I get the error message shown below which indicates System.Data.Common.DbDataAdapter.Fill(DataSet dataSet. I've completely erased all data and entered a new set of test data so I know there is no problem with relationships. Each table has primary key which is foreign key in other table. IS there something wrong with the Imports section: Imports System
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I have a problem in my code I can't seem to find a solution for.. One combobox is being filled up with a datatable like this:
CbUsers.Datasource = usersDAO.getUsers()
The getUsers() returns a datatable from my acces database. Users have a name and id, I want to use both of them but it should be something like this:
CbUsers.DisplayMember = "username"
CbUsers.valueMember = "userid"
In other words, I want to see the user name, but work with the user ID. So far the code worked, but it only displays stuff.
Now, in a method I want to use the id of the selected user in the combobox but that has been given me some trouble.
If I use this line I get a DataRowView: CbUsers.selectedValue
When I try to retrieve information from it, it throws an exception. I've tried lots of different code and it never worked..
If I put the DataRowView in a local variable and do this:
id = drv.items(0)
I only get exceptions..
way to work with a combobox that displays usernames but works with their id's?
I set combobox.datasource to a dataview item (so that it binds to a table), When I get return value from combobox.selectedvalue. Error was returned bcos it is of type"system.data.datarowview" I don't know why commonly its return value as text
The code :
If ldstList.Tables(0).Rows.Count <> 0 Then
With CbStatus
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why does my listbox returns System.Data.Datarowview?can you tell me what i need to change or adjust?
Private
Sub txtAchternaam_TextChanged(ByVal
sender As System.Object,
[code].....
I am trying to perform a simple bound connection between an Access database and a text box on a form. This is actually Chapter 18 of the "Microsoft Visual Basic 2008" book.I get the same error message when trying to create my own project "MY ADO Form" or the "ADO Form" project supplied from the DVD provided with the book. I am running the 90 Day Trial Version of Visual Studio 2008 with SP1 and Net 3.5 SP1.
My operating system is the 64 bit Version of Vista with all updates.The error when I try to run the application in the debug mode is:"A first chance exception of type 'System.InvalidOperationException' occurred in System.Data.dll"and as a result no data shows up in the text box from the database and the data selection bar is grayed out in the form. The underlying database "Students Data Set" appears to be fine as I have seen the correct data for the fields "Instructor" and "PhoneNumber" prior to running the program and when connecting with the database.
I am attempting to discover how I can populate a ComboBox with the data values already located in a data source that has been added to my project. I know how to use the ComboBox.Add method. I also know how to add individual value items contained in a manually entered array at design time using the For Each Next loop. However, I am unable to populate a ComboBox with all values for a field of a table in a data source that has been added to my project. I assume that I am unaware of some simple referencing step that will solve this problem.
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I am trying to insert a small message of 150 characters into the "AdvertisingInfo" database into the "QuickPost" column. Right now there is only one row that will have various columns updated by several forms.I just started to teach myself VB10 and it has taken me 6 hours to get this far. I'm tired of trying today and am going to bed, but I need help trying to figure this out. I keep getting the error: Value of type 'Integer' cannot be converted to 'System.Data.DataSet'.[code]
View 3 RepliesI am designing a form to Enter new City Name list where i accept following fields
CityName, District, State, Country, Pin.
because a State names and Country names can be retrived from earlier entries, i want to allow user to select desired name from a list in combo box or a list in Auto Complete Custom Source for text box, to do this i have added a Table Adapter to underlying DataSet having Query "SELECT DISTICT STATE FROM CITY ORDER BY STATE".
Now, how do i use this Table Adapter to fill the ComboBox List without binding
And also Custom Source List for TextBox.
I am trying to export a dataset to a csv file
VB
Private Sub ExportDatasetToCsv(ByVal MyDataSet As DataSet)
Dim str As New StringBuilder
For Each dr As DataRow In MyDataSet
[code]....
I am getting an error on this line: For Each dr As DataRow In MyDataSet The error is Expression is of type 'System.Data.DataSet', which is not a collection type.
I encountered error message "Conversion from type 'DataRowView' to type 'String' is not valid" when listbox1 item was selected. Listbox1 items were imported/binded from Access.
View 5 RepliesGreetings, I have installed Oracle 10g Express Edition database on a server and install the client on my PC. Now, I`m developing a vb.net application using visual studio 2005 and I need to use the oracle 10g express edition database. SO I initialize the connection using the following connection string:
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I have 2 tables in a Access 2010 database. tblA that stores speciesID and weight and tblB has SpeciesID and SpeciesName.Now I want a Combobox that shows SpeciesName and a textbox that shows weight.A have one query that select everyting from tblB, qryB.I have created a form frmA:
in this I have
Combobox1
txt1[code]......
my system is fully designed but everytime I click a button that will to another form (which is also fully designed) the response of my system is to slow. Can you suggest anything to make it faster? I'm afraid that it will catch the attention of the panelist (I have a defense, 2 weeks from now).Here's the image which I've screen shot. Everytime I click a button it will take up to 3 seconds. Thats the sequence.
View 7 RepliesI have a laptop with vista and desktop with win xp. I am building the application on win vista but when i copy the same project and view it on win xp , then it only shows the fields that fits on the screen. the rest of the fields that needed to be scrolled on right , does not come at all. The project works fine on win vista. I even tried to tried publishing the project. it works fine on win vista but is missing some fields on win xp.
View 9 RepliesI have a timed event that displays a balloon in the system tray. I would like this icon to remain active for 2 minutes or when the user closes it. When this time expires, the balloon should close and begin a function. I am having 2 problems with this:
1) The baloon icon is limited to between 10 and 30 seconds, when the user is active, so it closes to soon.
2) when the user is not active, the inactive time does not count agenst the timer.
I've been wondering, how would you make a vBulletin system that checks what users are online and displays them?
I already know how to make a login system, but can't figure this out.
iam currently working on my uni project and i have encountered a problem with valadation section.My system displays a message telling the user to input any fields that they have missed out on, listing the name of the field. However as these IF functions are in order the user must input the data in the order of how it is in the code. for example if the "consweight" is inputed and the calculate button is pressed, it thinks that all valadation above it has occured, when those fields are still empty.
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Can someone please tell me why no data is being displaysed in my WPF DataGrid with the following code:[code]
View 2 Replies