i have a problem when add data into dataTable. The problem is that after populating the dataTable with the 1st, and when adding a 2nd column, the row that contain the data is not at 1st row of 2nd column. It is directly under 1st column row. For example, column 1 has 10 rows of data. After adding the 2nd column, the data is at row 11 instead on the 1st row. Can someone tell me how to add the data for 2nd column so that it will be in the 1st row. Code for adding the data
Dim col1 As DataColumn
Dim row1 As DataRow
col1 = New DataColumn("Column 2", System.Type.GetType(" System.String"))
dTable.Columns.Add(col1)
I have a session which contains a datatable and also have a function which returns a datatable. I need to add these two. How can I do this? The below code is to be replaced with correct code.
Session("Table")=Session("Table")+obj.GetCustomer() where obj is an object of the business layer.
The '+' sign cannot be used to add these two, so how can I do this?
I am updating a data table (dt_report_crypt) from an encrypted csv file in the code below:I decrypt the colums and update the same dreport_crypt, such that it will contain de-crypted data.This part is working wellI however need to use this de-crypted datatable as a data source to update a second table(dt_report), using the sql SELECT command to filter relevant data,
Dim dt_report As DataTable Dim dt_report_crypt As DataTable Using cn As
I have a DataTable oDT. oDT is populated from SQL Server with 6 columns including a column "bAAA" of varbinary(200) I have a function fx(ByVal byteArray As Byte()) as String I would like to add a calculated column to oDT something like this:
oDT.Columns.Add("sAAA", GetType(String), fx(bAAA)) 'bAAA is not declared oDT.Columns.Add("sAAA", GetType(String), fx("bAAA".ToArray))
I've VB.NET function that reads data from an Excel sheet and adds rows in a Datatable.
Private Function LoadDataToRows(ByVal TableName As DataTable, ByVal Header As System.Collections.Specialized.StringCollection) As Boolean Dim HeaderDataExcel As String = String.Empty 'Data Header
How do I go about adding a ButtonColumn to a DataTable.
I am basically using a DataTable as the DataSource of a DataGrid and need to add a ButtonColumn to the DataTable so that when I DataBind it to the DataGrid it all works.
Although when I try
dt.Columns.Add(buttonColumn)
This is not allowed. It has to be a basic DataColumn.
See the code below which is triggered on a datagridview row validation event where the datagridview datasource is a datatable.
The messagebox shows that it loops around as expected populating the datarow with the expected values (NOTE: There are no primary keys as this is a college assignment with specific requirement and all fields can be nullable).
I had to use ImportRows as AddRows would always error due to "This row belongs to another table" the odd thing was the values were different and again the table contains no primary keys.
The code below runs but never adds a datarow to the dataset datatable "Bookings", does anyone know what the problem might be?
I am trying to add a datatable to a database. Here's what I've been trying:
Dim newDataTable As DataTable = New DataTable("Example") VocabularyDataSet.Tables.Add(newDataTable) SqlDataAdapter1.Fill(VocabularyDataSet.Tables("Example"))
I've tried various incarnations of Fill and Update. But the tables will not save on the database!
I have a function that converts a .csv file to a datatable. One of the columns I am converting is is a field of names that have a comma in them i.e. "Doe, John" when converting the function treats this as 2 seperate fields because of the comma. I need the datatable to hold this as one field Doe, John in the datatable.
Function CSV2DataTable(ByVal filename As String, ByVal sepChar As String) As DataTable Dim reader As System.IO.StreamReader Dim table As New DataTable Dim colAdded As Boolean = False
I'm adding a DateTime DataColumn to a DataTable like this: Dim colDate As DataColumn = New DataColumn("Date") colDate.DataType = System.Type.GetType("System.DateTime") dt.Columns.Add(colDate) Then when I try to add it to my datatable, if the value is Nothing I get an error saying string was not recognized as a valid DateTime. I'm having trouble getting this to work.
Using con As New MySqlConnection(strCon) 'get users direct friends Dim cmd As MySqlCommand = New MySqlCommand("SELECT distinct f.* FROM friends f WHERE (f.UserID = ?UserID) AND (f.FriendUserID <> ?FriendUserID)", con) cmd.Parameters.AddWithValue("?UserID", UserID)
[Code]...
now I need to create another command, datatable and datareader in this same function and add the rows of that datatable to the one above. What is the most efficient way of doing this?
I have a datagridview that I've added a checkbox column to. When I preview my data without the checkbox it works fine. when I run the program and try to load the datatable, I get a data error. I'm not sure what may be causing this. Where can I look to figure out what's causing this error?
I have a data table in a loop that adds rows on each loop. During the loop i collect an array of unknown size. At the end of the loop i want to add a new row to the datatable with eachelement of the array as a field.[code]I could hard code this if i knew how many item would be in the array but i dont.Is there any way i can loop through the array and append the value to a row?
I am trying to add the returned values from an array to the rows in a data table: Here is my current code the values load properly into the list box but not the table, each row ends up with the same value.
current code not working correctly Dim dtrow As DataRow Dim lat As Double = CDbl(34.213209)
adding to the binding source then setting the combobox to selectedIndex of newly added row is not working.the new row is in there but it does not set the selectedIndex to the specified index. but if I run the code a second time it selects it.what can i do to make sure the combo uses the specified index?
Dim drv As DataRowView = CType(Dispatch.M8CustomersBindingSource.AddNew(), DataRowView) drv("custID") = "999999" drv("CustomerName") = "Select Customer"
I'm trying to connect a VB application (2010) to an MS Access DB by adding a data source from the data menu but I receive this error message "The connection you selected uses a local data file that is not in the current project.Would you like to copy the file to your project and modify the connection ?
If you copy the data file to your project, it will be copied to the project's output directory each time you run the application" and the options are (yes , No , Help)
If I choose Yes I will not be able to make the application 'device independent ' since it will not be copied under the bin , and if I choose No , changes won't be applied to the DB
I am trying to pass a different template to a Telerik Grid, depending on if the add button or the edit button is pressed (on creation: a few field to fill. on existing: add button : some extra fields to fill, edit button : most field are read-only, new field to fill).
Dim myGrid = Html.Telerik().Grid(Of SomeModel) _ .Name("myGrid") If Model.Action = AddNewData Then myGrid.Editable(Sub(editing) _
[code]....
I have no idea on how to do the if "gridBoutonPushed = Add" then part.
How would you add data source to your combobox from a combobox that is connected to the access atabase?they are both ın the same form of course and the software language ıs Visual Basic. I ve got two comboboxes that I need to connect with eachother combobox1 is showing the "itemsonsell" from the "table_items" table from my access database, the second one should show the "prices" value from "table_items" depending on which "itemsonsell" item is chosen on combobox1,I ve done the solution below,but it didnt seem to be working,it is showing all the "prices" that are under the "table_items" table's "prices" class.
i want to know that when im adding my data in form after loading one person data then 2nd person data the 2nd person data cannot come to next line it is adding on the same line.plz tell me wat can i do?
I have a datagridview on form1 but I don't want users adding data using datagridview, instead, I wanna use details view. So I created a form2, dragged and dropped details view on form2. I changed the Addnew on BindingNavigator to None and added a code to the Addnew click event handler to call the form2 out so that I could add data from there. But, when form2 loaded. the textboxes pulled out all the information from datagridview. I did not want that, I wanted all the textboxes to appear empty when it was loaded. so I deleted all the textboxes and added my own textboxes so that they appeared empty when form2 was loaded.
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Me.VendorTableAdapter.Insert(TextBox1.Text, TextBox2.Text, TextBox3.Text, TextBox4.Text) Me.VendorTableAdapter.Fill(Me.VendorDataSet.vendor) End Sub
I added the above code to allow users to add data into datagridview using data details view.
I'm displaying data from a database in a datagridview, but the player also needs to be able to add new rows, which isn't allowed because the datagridview is data-bound. What is the simplest workaround to this problem?
I would like to sum data in dataTable from to if ColumnLine <> SA sum only HINKSHKEY = 1 if ColumnLine = SA sum all data I try to use code below but it not work.
I'm not really sure how a datatable is really used, but I've used it in an application I'm writing, by way of examples I've found online. Basically can anyone give me an explanation of datatables in laymen's terms? Second I have an example to discuss. I have a datatable that is filled with a result from a MySQL query. How can I populate a textbox with a specific item from the datatable?
I am trying to import a large array of integers stored as a csv file into a VB.Net DataTable called BeamMap. The .csv file consists only of integers, with a delimiter of ,, no quotes around the data (ie., 1,3,-2,44,1), and an end of line character of line feed and carriage return. All I want to do is get each integer into a DataTable cell with the appropriate rows and columns (there are the same number of columns for each row) and be able to reference it later on in my code. I really don't want anything more than absolutely necessary in the code (no titles, captions, headings, etc.), and I need it to be fairly efficient (the csv array is approx. ~1000 x ~1000).
