Datatype In Manually Added Column?
Nov 30, 2010Dim pctofpax As New DataColumn
pctofpax = New DataColumn("PCTPAX1", GetType(Decimal))
pctofpax.Expression = "[ASOFPAX] / [YEPAX]"
[code].....
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Datatype - Use Value (23 - 32) In Sql Column And Comma In Column Datatype Int
Mar 27, 2011how can i use value (23,32) in sql column datatype int how can i use comma in column data type int
View 8 RepliesDatagridview With Manually Added Comboboxcolumn?
Jan 14, 2011i am using a Datagridview on my form. It get's it's datasource from a dataset: grd.datasource=set_temp After that I add ComboboxColumns manually. At the end I loop columns and set values into that cells from the comboboxcolumns. Works perfect so far. Now I click on a header and the sorting is changed, and then the cells from the comboboxcolumns all lose their values, they are all empty.
Why and what do I do to avoid that? Or must i refill those manual Values after sorting?
Events Firing Off Unexpectingly More Than Once , Manually Added/removed Event Handlers?
Sep 29, 2009I'm creating a small game which when the user clicking a menustrip item "New game" adds event handlers to each label in a panel control.
For Each scoreLabel As Label In Me.panelScore.Controls
If Not (scoreLabel.Name = "lblLeftBonus" Or scoreLabel.Name = "lblLeftTotal" _
Or scoreLabel.Name = "lblRightBonus" Or scoreLabel.Name = "lblRightTotal") Then
[code].....
Putting A Value In A Cell Via The Column Name When The Column Is Added At Runtime?
Apr 25, 2010I'm trying to create a datagridviewrow and add data to it at runtime. I want the row to have the cells correspond to the columns in a datagridview, so that when I add data to the cells i can call the column name (the columns are likely to change around, so i think the name is better to use then the index).I create the row using the following code:
Dim row As New DataGridViewRow
row.CreateCells(Datagrid)
and the column using the following code:
Dim col As New DataGridViewComboBoxColumn
col.HeaderText = "Reference"
col.Name = "Reference"
datagrid.Columns.Insert(0, col)
I would like to add data to the row via the following code (or something similar that uses the column name instead of the index:
arow.Cells("Reference").Value = Detail.Reference
However at runtime I get the exception Column named Reference cannot be found. Parameter name: columnName I have a sneaking suspicion that the cells cannot be accessed with the column name because the row isnt really attached to columns yet (the row hasnt been added to the datagridview yet. (I tried cloning the cells of a row and then adding them to the row but no success)?
2003 : Manually Increment A Data Column?
May 14, 2009What i am doing is trying to manually increment a data column with a range of my choice. Say i have a range from 1 - 10. Now with my update query i want to update a column with 1,2,3,4,5,6,7,8,9,10 UPDATE TABLE SET Type = [min_range] to [max_range] WHERE Po = 'A' AND Loc = 'F'; WHERE Po = 'A' AND Loc = 'F' will return 10 records but i want type to be 1 - 10 for those records couple of days trying to get this work and i am using VB 2008 .NET.
View 1 RepliesCreate A Column Name With Date As Its Datatype?
May 11, 2010is there a date datatype in visual studio 2008? cause i want to create a column name with date as its datatype.. but the one that comes out is datetime..
View 4 RepliesGet And Use Datatype Of Sorted Column In Datagridview ?
Jan 13, 2012What i am trying to do is get the data type of the sorted column that the user selects in order to properly convert a variable. the variable will be used to locate similar values in the dataset that populates the datagrid view.
View 10 RepliesChange Column Into Checkbox With Datatype Of Boolean?
Jun 23, 2009how to change column into checkbox with datatype of Boolean?
View 3 RepliesIDE :: Update Dataset Column Datatype In Bulk
Feb 2, 2009I have a dataset with numerous tables.I have changed the column type of a couple of columns in the source DB form smallint to int.No I need to update the datasets (and eventually the code) to the appropriate datatype.Rather than hunt around the dataset and find all the places where these columns are referenced is there a way to direct the dataset to go back to the DB, reread the queries and update the datatypes.I know I can either change the field or one by one go to each table and force it reread the query but I want the dataset to do it in mass.
View 3 RepliesRead XML Data From SQL Server (xml Datatype Column)
Dec 26, 2008how to work with XML.I need to create an multilingual application and need to save the controls captions in sql table with xml data typei started the following:[code]I know this is not very professional but thats all i did until know in SQLNow i have a problem in VB.NET i don't know how to read an xml data type (How to get the value from variables).If somebody can give me an exmaple how to read the xml than i would continue translating for each objects in the form where name is like the variable "btnLogin" and give it the controls.text property to the variables value.
View 5 RepliesSelect AVG Of A Column With Decimal Datatype From The Code?
Mar 9, 2009I have a column in DB called price with Decimal as its datatype. when I use:dim r as objectAccessConnection.Open()cmd = AccessConnection.CreateCommand()r = cmd.CommandText = "SELECT AVG (Price) FROM Sale;"I receive an error "Decimal byte array constructor requries an array of length four containing valid decimal bytes."It works fine with other datatype such as Integer and Double. What is my problem?
View 1 RepliesSum Of A Double Datatype Column In Crystal Report?
Dec 25, 2010I want this for a windows forms application (vb.net '08). I want a code for: I have a column called total that is of datatype double in SQL Server 2005. How can I sum this field or column in crystal report?
View 1 RepliesAsp.net Mvc - Sorting Datatable With Linq With Correct Datatype Of A Column?
Mar 27, 2012I have this code that use to sort a datatable.
Dim sortingIndex As Integer = orderby
Dim DataTableNew As DataTable = New DataTable
DataTableNew = dt.Clone
Dim query = (From c In dt.AsEnumerable Order By c.Field(Of String)(sortingIndex) Ascending)
query.CopyToDataTable(DataTableNew, LoadOption.OverwriteChanges)
My problem is that with this method I always need (Of String) for it to work, so the date columns are also managed as Strings witch is the problem. Is there a way to use the correct type so the sorting is based on the type of the column?
Csv Column Contain Mix Datatype Connot Read All Cell Data Using Oledb Provider?
Jul 22, 2010my csv contain mix datatype f.ex. in cell E8 data format is date, and other data in this E column are string.i use this connetion string in classic asp ,VB Script and back end SQl server
ChekCnn.Open "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Path1 & ";Extended Properties=""text;HDR=YES;IMEX=1;FMT=Delimited"""
Set rs1 = ChekCnn.Execute("SELECT * FROM myCSV.csv")
[code].....
Using Datatype Object And Determine Datatype In Class Property - Several Integers Columns That Are Null In The Db?
Mar 8, 2010anything wrong with using datatype object and determine datatype in class property? I have a typed dataset and it has several integers columns that are null in the db. and when I make a call it throws exception.is there anythign wrong with setting it as object in my dataset.. changing the throw exception property to Nothing and passing it to my property as integer?
for each row in myDS.DataTable
cRate.CustID = row.CustID
next row
and in my class
Public Property CustID() As Integer
Get
Return _custID[code].............
Store Bunch Of Jpeg Files From A Folder In Local File System To A Column In Database With Datatype Image?
Jan 5, 2012I Need to Store bunch of Jpeg files from local file system to a column with image datatype in databse.Can any one please provide me some code to do it?
View 6 RepliesDataGridView Not Showing Value In Added Column?
Sep 16, 2010With this project, I created a SQL Server DB with related Dataset and DataTable a while ago with about 10 columnsWith the code below, I fill those columns with values in a new row and add to the datatableThe datatable is bound in a datagridview and all has worked fine until I tried to add a new column to the dataset/table. After adding the new column and rebinding the datagridview to the updated table, the DGV now shows the new column, but the data for that column fails to show up in the DGV.
Dim dt As Date = DateAndTime.Now
If My.Forms.DataGenerator.TextBox4.Text <> "" Then
My.Forms.DataGenerator.TextBox8.Text = dt
[code].....
Updating DataGridView When Column Added?
Mar 17, 2011I have a datagrid view in my vb.net application. I want to update this DataGrid View so it shows any changes to the database (More specifically when a Column is added). I have tried
DataGridView1.Update()
Convert A TimeSpan Datatype To A DateTime Datatype?
Apr 30, 2002I'm using a 3rd party chart COM object (National Instruments CW graph) to plot data versus elapsed time.The x value needs to be a VB6 equivalent Date type which is a .NET DateTime datatype.What I need is a way to convert a TimeSpan datatype to a DateTime datatype.
Dim testTime as System.DateTime 'date
Dim plotTime as System.DateTime 'date
Dim elapsedTime as System.TimeSpan[code].....
Converting Timespan Datatype To Time Datatype?
Jan 15, 2012I have a database in mysql. The column in table is of datatype time(0)
Similarly I have a control datetimepicker in vb.net I have assigned format property as custom to the control and the CustomFormat property as HH:mm:ss tt so that it can just provide the time. I dont want the date to be in it.
Issue comes when I try to retrieve the value from database I get an error as Converion of type 'Timespan' to type 'Date' is not valid
Try
Dim myCommand As SqlCommand
myCommand = New SqlCommand("select * from [HMS].[dbo].[DoctorSchedule] where DoctorID='" & txtDoctorID.Text & "'", Connection)
[Code].....
C# - Added Overhead To Looking Up A Column In A DataTable By Name Rather Than By Index?
Apr 13, 2010In a DataTable object, is there added overhead to looking up a column value by name thisRow("ColumnA") rather than by the column index thisRow(0)? In which scenarios might this be an issue. I work on a team that has lots of experience writing VB6 code and I noticed that didn't do column lookups by name for DataTable objects or data grids. Even in .NET code, we use a set of integer constants to reference column names in these types of objects. I asked our team lead why this was so, and he mentioned that in VB6, there was a lot of overhead in looking up data by column name rather than by index. Is this still true for .NET?
[Code]...
VS 2005 Sort Data New Column Added To DataTable?
Feb 21, 2011I am creating a datatable and then adding a column to it which is filled with data from existing column and parsed into correct format DateSold is my existing column from my datafile and I create NewDateSold by adding the column to the existing table and then parsing the information in date format.
This is added to a binding source which then is used to populate a combobox I want to be able to sort the combo box by NewDateSold Desc I was able to this on the original column by simply using the "order By" in my query, it seems now that I added new column it is no longer sorted? I am finding different solution such as using dataview and wish to know the best way to do this
Column With Bit Datatype In Sql Server Table(2008).while Returing To Text Box Its Returning True In Text Box Instead Of 1
May 2, 2012I have column with bit datatype in sql server table(2008).while returing to text box its returning true in text box instead of 1.i tried converting it from true to 1 using txtboolvalue.text=Math.abs(CINT(ReturnList.Item(34)).tostring. But it doesnt convert true to 1
Secondly: im checking for columns in datatable if there are any nulls. its checking for nulls in the sqlserver table but its returning true if there is a null.i just want it to return NULL is there is null i textbox..
CODE:
Then
CODE:
VS 2008 Dropdown Box Displays All The Items Previously Added To That Column?
Apr 30, 2010The dropdown box displays all the items previously added to that column.
I want the user to be able to enter a new value OR just pick a previous value from the dropdown list. (This is when inserting a new row)
Problem:
Whenever I enter a value, it jumps around in my table like its on acid or something. Whenever I select a value from the list, it takes me to the line in which the value was originally entered.
How do I get it to do what I want.
Changing DataType To An SQL Or Database Datatype?
Jan 2, 2011I am working on a produce inventory database in my VB Express program.I have a form on the bottom and a spreadsheet at the top. I want to enter all the data in the form and have that data automatically transferred as a group to the spreadshet in the upper part of the page when I press a button.I know that there's an insert function.I set it up correctly. The problem is that I have to convert the textbox, which contain string data, to the datatype used in the database spreadsheet.HOw do I use CAST or do this?Here's the function I am using:
Me.TableAdapterManager.InventoryTableAdapter.Insert(IDTextBox.Text, fruitName, unitprice, unitsize, unitIn, unitTransit, unitOut)
Evernything is a string cause the data is coming from a textbox, I need to convert it to the datatypes used in the database.Also how do I use the CAST and Convert functions
Update The Dataset To Reflect An Added Column In The Data Source Without Deleting The Adapter?
Mar 28, 2011I've made a dataset using the dataset designer, and I'm trying to add a column to reflect changes made to the database (added a column, nothing fancy). Is there a way to 'refresh' the dataset schema from the datasource without deleting my adapter (and all the methods and queries I've created)?
View 2 RepliesDataColumn.Expression Count - Filter On The Day, Count The Rows And Then Populate This Added Column With The Result?
Nov 2, 2010I have added a column to a Datatable called CallsPerDay which is there to tell me how many telephone calls have been made on a particular day or days.Is there a datacolumn.expression which will allow me to Filter on the day, count the rows and then populate this added column with the result.
View 1 RepliesControl Added On The Fly Is Added To The Wrong Location Of An Auto-scroll Panel?
Jun 21, 2010I have a program that adds controls on the fly to an auto-scroll panel. When the panel is scrolled (viewing the bottom of the panel for example) and a control is added, it looks like it is added assuming the top left corner of the panel is still at 0,0 when in fact it may be 0,500. To see what I am talking about, create an empty "Windows Forms Application" project and insert the below code into it.
Friend WithEvents Panel1 As System.Windows.Forms.Panel
Friend WithEvents btnAdd As System.Windows.Forms.Button
Dim ButtonCount As Integer
[code]......
Dynamic Added Textbox To Status Bar And Added Event
Jun 10, 2009i have multiple forms in a project and all have statusbar. there is no way to add textbox on status bar but in my previous thread i got the help to add the text box. i created a function in module so that i call that function from all the forms on load and add the textbox on status bar and also add the event on textchange. the function to be called on event change is in individual form (at present)[code]
View 11 Replies