How To Save Contents Of Field From Row In DataTable
May 27, 2010
I have a "For
Each
Row As
System.Data.DataRow
In
DataTable.Rows" type loop. I want to save the contents of a field to use in subsequent processing.
It looks to me like the proper way would be to use something like the following:
Dim saveCatalogWorkID As VariantType
For Each clsWTRow As System.Data.DataRow In clsWTDataTable.Rows
saveCatalogWorkID = clsWTRow.Field("CatalogWorkID")
Next clsWTRow
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Mar 25, 2011
I've created and populated a stringbuilder for a csv file. Normally I write it directly to the response object for the user to download through the browser.However, now I want to save it to a SQL DB image field. Is there a direct way to stream it in?
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Nov 18, 2009
load the contents of a query from a dataTable Adapter into a datatable?
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Aug 18, 2011
I am trying to display value of the field ("UserID") for every row exists in datatable to checkboxlist(make the checkboxlist item selected).
I used for loop, but only the field value from last row of RoleUsers table is selected in the checkboxlist.
Here is my code
Private Sub DisplayRoleUser()
Dim conn As SqlConnection
Dim cmd As SqlCommand
[Code].....
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Feb 20, 2010
I want to create a datatable using he contents of a DataGridView.
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Mar 9, 2012
I've got two lists, ones a DataTable, the others an array list. I want to populate a CheckBoxList with the contents of the DataTable, and check any entries that exist in the array list:
Heres the DataTable that will populate the checkboxlist with the product column:
index product
1 Prod1
3 Prod2
5 Prod3
[Code]....
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Jan 26, 2009
Am using the following code to print the contents of a DataTable
[Code]...
The columns are overlapping each other and am not able set the printed page to landscape
I checked the example in the code bank but it is way more complex than what I need
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May 8, 2008
I am working on a 1-page report, that basically consists to select 1 record from table and bind values to proper fields (eg. =Fields!name.Value).However, I have one field in the table that will be just "Y" or "N".When this field will be "Y" I would like to show in the report "Yes, I do."; otherwise I would like to show "No, I dont."
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Mar 15, 2009
I am trying to use the value of a field of the last row in a table. I have been trying to use tables().Rows().Item() but somehow it always returns the value of the first row instead of the last one. here is the code:
Dim accion As String
Label1.Text = ""
Label2.Text = ""
Label3.Text = ""
Me.HorasTableAdapter.Fill(Me.ControlDataSet.Horas)
[Code] .....
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Aug 26, 2011
I am having a heck of a time with some very simple json. I have a very basic VB.NET webform which which writes out the contents of a datatable serizlized with JavaScriptSerializer.
CODE:
On the jquery side I am doing this.
CODE:
This is returning "invalid json"
Here is the output
CODE:
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Mar 15, 2012
I'm having some problems calculating the values for two diferent fiels of the datatable. it return " Object reference not set to an instance of an object"this is How I feed the datatable
Dim daProd As New SqlDataAdapter
Dim conProd As New SqlConnection
conProd = Connect()
Dim cmdProd, cmdSave As New SqlCommand
[code]....
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Mar 8, 2010
I have tried:
ObjDTOleDBNFeIntegra.Rows(I)("[Cnpj Cpf]").ToString() //with brackets
ObjDTOleDBNFeIntegra.Rows(I)("'Cnpj Cpf'").ToString() //with apostrophe
ObjDTOleDBNFeIntegra.Rows(I)("Cnpj Cpf").ToString() //without anything
I'm using VB.NET, but comments with apostrophes in here don't seem to be identified.And I get the exceptions for each case:
Column '[Cnpj Cpf]' does not belong to table Table. (fail)
Column 'Cnpj Cpf' does not belong to table Table. (fail)
Column ''Cnpj Cpf'' does not belong to table Table. (fail)
What should I do in order to ger a value from a field in a dataTable when the column name has spaces ?
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Mar 1, 2010
I have a field in a datatable (dt) that can be integer or NULL.
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Mar 5, 2009
If the field type in the SQLServer db is 'nvarchar 10', what would be / is the field type in a DataTable filled by rows from this SQLServer table? String?
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Jul 9, 2009
I have this working for a single field in a text but im trying to add more than one fields data .[code]...
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Jun 28, 2009
Is it possible to save listbox contents, on form_closing event, and reload them on the form_load event? If so, could you please show me how?
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Sep 5, 2009
How would I save the contents in the textbox so that next time the form containing the textbox is opened, it will still have the same text?
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Jan 24, 2011
I want to save the listbox contents in to xyz.txt .How can i do this in VB? I want it to save automaticaly into C:xyz.txt .
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Aug 16, 2009
I need to use .Select and filtering year on a date field,how can this be done,the next code give me error : the expression contains undefined function call year() vb.net For Each wRwTmp As DataRow In wTblC.Select("year(start_date)=" + wYear.ToString)Next
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Jun 22, 2010
I have tried many methods to save my datagridview contents to a file but with no luck does anybody have a good method for xml to datagridview, datagridview to Xml,or any other methods to read/write a datagridview.
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May 2, 2011
Ive built a very small application for personal use only. Ive been working on it for around 2-3 weeks & have just finally completed it this morning.
Basically what I want to do is add a button to my form which will allow me to take the contents of the listbox and print it out or atleast be able to save it to a word document or something of that kind, I'm not entirely sure how I would go about doing this. Bare in mind, Ive only just stepped into VB around a month ago.. self learning myself via internet & several books I have at hand.
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Mar 30, 2010
I have tried the internet and I got this [code]...
So Please help me I have spent 3 days on the internet searching and I have finally came here. I am using Visual Basic .NET 9 if you want to know.
How many linux users does it take to change a lightbulb?
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Dec 14, 2010
I have a combo box, that i have linked to a text box, to save continious data. How would i save the contents of that combo box?
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Aug 2, 2011
I've created a windows form in VB Express 2005 with lots of combo boxes and print and save buttons.I would like to be able to save the contents of the populated combo boxes, labels etc ie the whole form from the save button, preferably to excel 2003. However, would be just as happy to save it in the form format. The only code behind the save button I have so far is this, which just navigates me to the directory. When I enter a filename and extension, the directory is empty:
Private Sub save_Click(ByVal sender As System.Object, _
ByVal e As System.EventArgs) Handles Save.Click
' Displays a SaveFileDialog so the user can save the file assigned to the Save button.
[code]....
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Feb 5, 2009
finding a solution on how to save a four level treeview on each table in the database? each level must be saved in the table w/c includes their parent-child relationship.
[Code]...
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Sep 26, 2009
How would I save the contents in a textbox? Right now I save a "Save" button, and heres the code
1.Text = My.Settings.1
2.Text = My.Settings.2
3.Text = My.Settings.3
[Code]...
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Oct 5, 2010
I have used the XML serialization to save a single text and a picture in a XML file.However, I am confused on how to extend the concept further.I have a second Windows Form which has a TableLayoutPanel in which each cell has a Picture Box and a TextBox. The user has the option to set the number of rows and columns himself, so I do not know about the number of pictures that have to be saved in the XML file. Further, when the user pressed the load button, the same pictures have to come back to their original pictures boxes in the TableLayout.
How can I save the contents of the TableLayout in the XML file and retrieve them in their corresponding cells?
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Jun 22, 2012
I have been trying for days to work this code. I want to transfer the information from a listbox to a table in an access database. The listbox gets its information from a text file using stream reader. My code so far has produced an error at the NewRow Method. I am using VB.Net 2010
[Code]...
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May 22, 2009
I have an application that pings IP addresses. When complete it will probably have close to 1000 IP addresses it will ping. I have a settings page that has a textbox that stores the IP address (one IP address eg. 192.158.1.1 per text box) for the object to ping. I want to be able to save all of the textbox IP address into a text file, and then be able to load the IP addresses from the text file into the respective text boxes.
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Mar 12, 2010
I want to be able to save anything the user typed in the rich text box in my form into a .txt file in a location of their choosing after using the 'Save' option on the menu.[code]...
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