i have a dataset and i want to create a textbox and a button that once you click on it it will search for the word in that textbox in the dataset, for example like in sql with the "LIKE %xxxx%" format.
here is an exapample:
Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
Dim dr As DataRow()
[Code].....
I need to cycle through a controls binded sources data.For instance I have a text box bound to a dataset, the datamember is a column in that tableadapter
I then would like to click a button that will show the next record.
How do i search a dataset or datatable for a record by entering 3 values in the search. If the row exists, I want to amend some of the data in that row?
View 1 RepliesI have a Dataset Lets call it Dataset1. I have 1 table in this dataset created in designer called settings. I want to be able to declare the intial dataset in one form as a global variable and make a copy of it in another form. However I don't want to fill it until after I have made the copy except that it is not working.[code]The problem is the Dt returns the same amount of columns and the exact column names that I have in the settings datatable. When I do Dt.ReadXml("Myxmlfile") I don't get any rows populated yet the columns are in the xml file and in the dt copy of the datable.
View 1 RepliesI 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 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
[Code]...
I have designed an application for a company which has 5 client computers that read and write data to an sql2008 instance on a server.I would like to know the way to detect a change in a table whithout having to refill the table adapter.Let's say that all the client applications have a datagridview on the main form which binds to a table on the database lets say Members table (members binding source)Whenever a client makes a change to that table (lets say that it updates the Last name of a member) i would like the rest of the clients to detect that update and as a result ,update the specific row or cell in the datagridview.Is there some kind of event that is raised?
View 1 Repliesi am trying to copy data from a standard Dataset to a Type Dataset (XSD) of same table structure. i want to use Automapper to do that one. So how can i do that using automapper?
View 1 RepliesI have two Datagrids, One grid has all the customers garments on it with style number and contact length. The other grid has the users who have garment issued to them. the style number is in both grids. I need to loop through the users grid and say if the contract number is 1 from the first grid then the contract date on the second grid will be todays date + 365 days (year contract) I have looked at using a stored procedure and also a for each command but I am just getting stuck with it all. [Code]
View 1 RepliesI have an application has a data entry form, and currently I'm using the form validation and validated events to validate the data - along with an error provider. I've read that this logic should be placed in the Dataset rather than the form. To that end, i've started exploring how to do that.
[Code]...
My task for the moment is just to find out what the height of ListView's data row is (not the header--different height). The height of a ListView meant to fit exactly the contents of the list can't be set statically. This is because, when a system uses font scaling, the ListView rows are going to be scaled relative to the scaled font. So, I have to find out what the height of the first row is (since they're all the same height) and then multiply that by the number of items in the list. This should get me an exact fit for the height of the ListView.
View 7 Repliesi can connect to only one Data Base with dataset in Visual Basic . but i want Have Dynamic connection to data base i mean in want to my appliction users have ablity to connect to any data base they want (For Example : Choose file from menu and then open and then Select any Data base.)
View 4 RepliesI'm having trouble locating a specific value in a dataset.
I have a datatable with 2 columns... "TaskName" and "TaskID" ...I need to look against the dataset using a "Task Name" to return a "TaskID"
on button click...
dim dv as new dataview(ds.tables("TaskTable")
dv.sort = "TaskName"
dv.RowFilter = "TaskName = '" & Textbox1.Text & "'"
Textbox2.text = dv.item(0).toString
This doesnt work, and I don't really want to use a dataview object when I'm not publishing the data to a datagrid or anything like that..
I have this code so I can grab the values ind the dataset before i bind it.can't get the dirctcast to work
dim ds as new dataset("Mytable")
gridView.DataSource = ds
Dim dataRow As DataRowView = DirectCast(ds.Tables.Item("MyTable").Rows(), DataRowView)
Dim ID_Equipamento As String = dataRow("ID_Equipamento").ToString()
Dim ID_Password = dataRow("ID_Password").ToString()
I have made a small "front-end" application for an Access databasefile.
I set up 3 tables with relations in Access, and added the database as a datasource in my project. I have done no database programming, and the app has worked nicely for about 2 years. It's a simple master-detail form with 2 datagridviews dragged from the datasource window.
Yesterday I opened the project to add a new form. The form is just a "setttings form" with no database activities.
When I press F5 - the main form do not start, and I get the error message "DataMember property '{0}' cannot be found on the DataSource." - where the property name is the name of one of the 2 relationships in the datasource.
I am making an sql search engine. I need it to find a row of data take some of the columns and paste it to some labels or textboxes.Need some help with the code got my connection, command, I am thinking on how to split the notes and the username onto two different controls or should I get two different sql statements for them ?
Private Sub btnFind_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnFind.Click
Dim con As New SqlConnection
Dim cmd As SqlCommand = New SqlCommand("select owner, notes from orders where orderref = '" + txtReference.Text + "'", con)
[code]....
I pass it a valid dataset that has the department name and the Department id as a number..20, 40, 30..... I want to get the department number.. I pass it HR(which is in the ds.table) but I am getting an error on the rows.find() "Input string was not in a correct format" it is a string.. what else could i be doing wrong here...
Public Function GetDeptID(ByRef ds As DataSet, ByVal strDepartment As String) As Integer
'Dim dr As DataRow
' Check to see if date is already in the table
[code].....
How to find record on a table using dataset?
View 2 RepliesI get a strange error when I am dragging tables from the server explorer into the datasetSome updating commands could not be generated automatically. The database returned the following error:Failed to find or load the registered .NET Framework Data ProviderI never had it before. I reinstalled .NET Framework 3.Some specs:
Local SQL Express 2005
Windows authentication
Visual Studio 2008
[code].....
Only my local dataset updates when adding, deleting or editing records.The Source Database is supposed to update on issuing DataAdapter. Update(dataset )However, when I check my source database after running the operations it remains the same as the original.
View 6 Repliesi have a situation where I need to search a table for a specific record that matches an ID number the user will specify. I know 2 methods to accomplish this. The first would involve writing some VB.net code that would call a TSQL statement and return the value through the return parameter. The second method would involve creating a dataset and populating it with a select statement.
View 2 RepliesWhen i load my database i load it into a DataSet.When i search the database i load the results in to a DataTable.I want to find what index a search result has in the DataSet.When navigating the dataset i can use this code to get the index ds.Tables"Filmer").Rows.IndexOf(ds.Tables ("Filmer"). Rows(inc))But i can't make i get the dataset index of a search result from the DataTable.I thought that i could use the same code when navigating the DataTable, but it only returns.
View 3 RepliesI've got a databound query in my application which is querying the "Customers" table in our database.I've created this directly from the ComboBox's datasource creator in the Design view.Various bits of code created in the designer include:
Me.CustomerBindingSource.DataSource = Me.CustomerDataSet
Me.ComboBox_Customers.DataSource = Me.CustomerBindingSource
What I've done in the first stage of developing this feature is to show my users a ComboBox showing a specific subset of the customer list by applying a filter to the BindingSource.
Me.CustomerBindingSource.Filter = "someColumn = 3"
What I want to do on a second pass is to allow the users to type a specific bit of information into a textbox and check whether it appears in Me.CustomerDataSet like so:
Dim x As IEnumerable(Of CustomerDataSet.customerRow) = From cust In Me.CustomerDataSet.customer Where cust.custno.Trim = "test"
If x.Count <> 0 Then
At this point, I have a customerRow object. I want to check whether this customerRow object appears in the list presented to users in Me.ComboBox_Customers via the filtered Me.CustomerBindingSource. Me.CustomerBindingSource does not (directly) contain customerRow objects, it contains Object objects.How do I find out whether Me.CustomerBindingSource contains the customerRow object at whatever lower level?Also Once I've determined that Me.CustomerBindingSource contains the item, how do I select that entry in the ComboBox?
I have a dataset (WW1Dataset) with one data table(WW1).(database used in an access database) I'm trying to filter the dataset e.g a user wants to filter by a chosen surname (SurnameTextBox.text) so the datset is filtered to display only those records wherethe surname column in the dataset matches SurnameTextBox.text.
View 1 RepliesI have a situation where I serialized data from a dataset to an xml file as a method of backup.I am trying to get the data deserialized back to the dataset.But for some reason, I cannot get the data to persist back to the DB.I don't receive any error messages either.The first chunk of code is the serialization code and the second chunk is the deserialization code.I can show that the deserialization back to the dataset is complete because this code in the 2nd block DataGridView2.DataSource = Movie_dbDataSet.movie_tb - displays the data in correct form all it is all there in the datagridview2.I call the update method but it does not get persisted back to the db.[code]
View 3 Replieswhen i try to insert data from database into dataset using data adapter, it takes long time, i want to use hourglass but i'm confused how or when i type the code so user will know that application still work.
View 1 RepliesI've got a form - CMCConsole It pops up a dialog form for adding a new case.If the matter number in a textbox on that dialog form matches an existing cases matter number I would like to find it in the binding source of the CMCConsole form
Private Function CheckMatter(ByVal MtrNum As String) As Boolean
Dim cfIndex As Integer = CMCConsole.caseBS.Find("MatterNumber", MtrNum)
Dim cfIndex2 As Integer = CMCConsole.casefileBS.Find("MatterNumber", MtrNum)
[code]....
But it appear the filter for the CASE we were just on that is set on the binding source is keeping the FIND from seeing other cases.
caseBS.Filter = "CaseId=" & e.Node.Tag.ToString
Do I have to clear the filter in order to find a matter number in some other case??
how to search xml file and display the result in list box.then export a xml file to excel in the search result
View 4 RepliesI 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've written a very simple program that writes a tiny "config.cfg" (text) file to the computer (using StreamWriter), and a second program that is supposed to read that data back.
Unfortunately, it appears you can't save to the same folder as your program under Win7 ("Program Files (x86)" is a restricted folder.) So instead, VB automatically saves my data to the "C:Users(myname)AppDataRoaming..." folder. This is annoying, but tolerable.
PROBLEM IS: How does my second app then FIND my data file (without doing a time-wasting drive search every time the program is run?)
My code:
' Program #1:
Private Sub cmdSave_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles cmdSave.Click
Dim FileWriter As New StreamWriter("config.cfg")
[Code].....