VS 2005 : Anomalous Behavior In Loading Item In A Datagrid?
Aug 10, 2010
I am trying to load contents of an Excel file in a datagrid. The data in the Excel file is arranged in rows and columns. Every column has a column header. Now here is the anomaly. For some reason when I put a less than sign (<) before some of the values in the last column, the values become blank before they are loaded into the data grid. This behavior is not observed when the less than sign is put into the other columns. More strangely the values are retained in the datagrid even if the the < is put before the values of the first few rows of the last columns within the Excel file. I used the following code in loading data into the Excel file:
Dim con As OleDbConnection
Dim da As OleDbDataAdapter
Dim ds As New DataSet
[code]....
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Jul 12, 2010
this is a reference to the thread:he problem I was having while loading data into a datagrid from Excel is solved when I have changed the connection string property IMEX to 1 in:
HTML
con = New OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & filename & ";Extended Properties=""Excel 8.0;HDR=Yes;IMEX=1;""")
[code].....
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Dec 13, 2009
now i use acces as datasource to view the agenda in a datagrid and a combo box to select a year or month so i can find the selected month or year in the datagrid .how do i program it so that it searches the selected year or month in a datagrid
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Sep 17, 2009
I have a form with the FormBorderStyle set to SizeableToolWindow. The close button - 'x' in the upper right corner - sends a DialogResult of 'cancel' to the FormClosing event when clicked. How do I set it so that it will send an 'OK'? I tried setting the form's DialogResult to 'OK' in the New method, but that's not working. I checked my code and I'm not setting it anywhere that I can see.
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May 7, 2009
is it possible to apply the effects/behavior of the new cellphones like iPhones, nokia, sony ericson in a software. I mean how they fade, selecting icons etc.If its possible how to make a smooth effect in software. Cause im planning to make a software but the effect/behavior is like in cellphones?
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Jan 14, 2012
I have a rather straightforward question.How to I get a DataGrid in WPF to save/load raw XML files and have the ability to display/edit them with other controls? The application will only work offline so I won't need SQL. Just simply open, edit and save data to XML.
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Dec 12, 2009
I am using one datagrid to load a resultset of query.
My query is "SELECT S.RACK,R,RNAME,SUM(B.QTY),SUM(B.VALE) FROM STOCK S,READYRACK R,BILLDET B WHERE S.SCODE = B.SCODE AND FLAG ='09' AND R.RACK = S.RACK AND B.BDT BETWEEN '01-NOV-09' AND '30-NOV-09' GROUP BY S.RACK,R.RNAME "
USING ORACLE 8i. I am using more than one table.
connstr = "DATA SOURCE =RASI;USER= BILL;PWD=AIRINDIA;"
conn = New OracleConnection(connstr)
conn.ConnectionString = connstr
conn.Open()
[Code] .....
When running my code, it didn't return any result.
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Jul 22, 2011
I am having a problem using ACE. I am on Windows 7 64 bit and I am using Visual Studio 2010. I have inherited a program that needs to be converted from using JET to ACE as more and more users could not use it on their new computers. All this little application does is sort data according to selected fields and then insert blank lines whenever the data changes. It worked fine with Jet built in VS 2005.
Line 32 is where I am getting trouble. I get one of two error when I get to this point "IErrorInfo.GetDescription failed with E_FAIL(0x80004005) when targeting any CPU. I found suggestions from people on the web to target X86 in the advanced compile options but then I get 'Microsoft.ACE.OLEDB.12.0' provider is not registered. This I think is due to the system looking for the 32 bit version of ACE but I am using the 64 bit.
When reading through the code the line da.Fill(dt) is underlined with the comment "Variable 'da' is used before it has been assigned a value. A null reference exception could result at runtime." This confuses me as I declare it at the top and it gets used in the if the statement. The only reason for the underline I can see is that there is no option in case the incoming data is not from csv,xls or xlsx but since the open file dialog doesn't allow for anything else that shouldn't matter.
Private Sub btnProcessFile_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnProcessFile.Click
Dim con As OleDbConnection
[Code].....
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Aug 27, 2011
I have an application using Visual Basic 2010 Express. Basically I load an XML file into a datagrid and then wish to modify it. Now the following code works fine:
Private Sub Modify_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Modify.Click
Dim da As New XmlDataDocument
da.Load(Environment.GetFolderPath(Environment.SpecialFolder.Desktop) & "/events.xml")
Dim path1 As String = "/calendar/event/title[text()='" & DataGridView1.CurrentRow.Cells(0).Value.ToString & "']"
Dim path2 As String = "/calendar/event/text[text()='" & DataGridView1.CurrentRow.Cells(1).Value.ToString & "']"
[Code] .....
Now the modify button does what it is intended to do as far as load the "title" and the "text" elements into the text boxes. However I want to load the other attributes into the text box. I.E. date, timeStart, timeFinish etc. Also, the just of this is to be able to modify an xml file without going into the xml file using a text editor.
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Feb 15, 2010
I am trying to run a routine to load a gridview from a sql table. I would like a progress meter to run until the grid is loaded. I have tried using the background worker component...but I havent found a really basic example of how to run the progress meter on the uiwhile loading the grid in the dowork event.. is this as intricate as it looks? I just have the meter tied to the tick event of a timer
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Jul 10, 2009
I have created a main windows form and then I have created another windows form but I cant work out how to load the 2nd form. I am using a button and would like to know how to load the 2nd windows form via that button.
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Apr 4, 2009
i have here a .txt format wherein It show like this:
n,1.alex.valantines@palazzoli.it,"Sent successfully"
neha,21.neha.singh@gmail.com,"Sent successfully"
kab,2mkab@2mkab.com,"Sent successfully"
mickey,69mickey@sbcglobal.net,"Sent successfully"
[Code]....
What my problem is that, how can I load this .txt file to a datagrid and arrange it in a 3 columns. That .txt file is auto generated that's why i cannot do anything about the textfile.
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Feb 25, 2009
i want to make program like this:
if DataGridView1.item(SID).value = DataGridView2.item(SID).value then
color=green
else
color=red
i want all item list in DataGridView2.item(SID).value will be checked.
this is my
Private Sub PSCDataGridView_CellFormatting(ByVal sender As Object, ByVal e As System.Windows.Forms.DataGridViewCellFormattingEventArgs) Handles PSCDataGridView.CellFormatting
Dim myBL As String
[code]....
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Jul 8, 2009
I am just trying to put an item into a datagrid from another datagrid.
So I got code like this which takes the right item but puts it into the wrong place. It is suppose to put it into Rows(0).Cells.Item(3) but it puts it into item(2) as it caunts from 0 to 3. If i try to put it into Rows(0).Cells.Item(4) I get an error - indexOutofRange.
DataGridCLI.Rows(0).Cells.Item(3).Value = datagridorder.Rows(0).Cells.Item(2).Value
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Nov 24, 2010
So Let me explain the situation, I have a Mainpage Form with a DataGrid Object on it. I have a Create Post Form and I want to use the create post form to also edit a post. Now only individuals who posted a specific post can edit it. I have all the validation code in to check the user etc. I used a simple boolean and then in the create post form created two subroutines, Newpost and Editpost. I have the New Post working perfectly, but i can't get the edit post to work.
Dim startdate As DateTime = Departdate.Value.Date
Dim enddate As DateTime = returndate.Value.Date
MainPage.SelectedPost = DirectCast(PostBindingSource.Current, DataRowView)
[code].....
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Mar 6, 2012
I'm trying to create a Select Distinct query, but i'm getting stuck with either an empy combobox either a filled combobox that displays all the doubles.or a message "System.Data.DataViewManagerListItemTypeDescriptor"
I have a form (form5) with 1 combobox and 1 datagrid.The datagrid loads 5 collumns "ID", "firm", "Fname", "mname", "Lname" The collumn "firm" will have some double firms with people in the other collumns ID Firm Fname Mname Lname1 AA John N West2 AA Jim L East3 BB Harry Sick Long4 CC Barry N Klote etc.I would like to select the firm from a combobox and filter the datagrid so that it only displays the selected firm and the people that are registred here. Furthermore i want the combobox that i use for selecting the firms to lose the doubles. I can load the datagrid and load the Combobox, but selecting is only pointing to the record (highlights in the grid) i choose and doesn't filter. Is there anyone that can give me a clue on how to solve this.
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Private Sub Form5_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
'TODO: This line of code loads data into the 'Kjelpasser2012DataSet.Employees' table. You can move, or remove it, as needed.
Me.EmployeesTableAdapter.Fill(Me.passer2012DataSet.Employees)
'Select DISTINCT "firm" from "Employees"
[code].....
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Aug 15, 2011
I am new in crystal report and i wanted to make a report using vb.net.here is my problem i want to display in my report are the item which is displayed by the datagridviewer.
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Mar 1, 2012
The following code was taken from a javascript script. What it's (supposedly) doing is assigning properties to the line item. A name, a relations array, rounds array (which they lost in), total wins, three tiebreaker scores, and if they had a bye. (This is for a swiss pairing algorithm.)[code]I want to do something like this in Visual Basic. I'm pulling data from a table using a OleDBReader. I want to give each item that is pulled a set of these properties. Then by some means changing them.
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Feb 15, 2012
Ok so for some reason I can't get the current item I selected in my datagrid to display on my textboxes
I'm new to vb net and programming itself so please bear with me.
[Code]...
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Jan 31, 2011
How do i return the column index of an item within a WPF Datagrid, when I click on a cell I'm using Visual Studio 2010/VB.Net?
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Jul 28, 2011
I am using Datagrid control to populate list of items/contents.I want to show what row has been selected, distinctive.What property of the datagrid control should i use ?
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Mar 14, 2012
I am working on a bound DataGrid that displays data from a database. I'm using Silverlight 5 if that helps. Currently all the data is stored in a Dictionary within the my entity object. Using the Property[Key] syntax for the binding path binds properly for display purposes. But the column acts like it is readonly when trying to change a column value in runtime.
Public Class Entity
Public Property Attributes As New Dictionary(Of String, Object)
End Class
[Code].....
My only thought right now is to store the column values in ordered lists and display them using an index rather than key. But I would really like to know why the key isn't working.
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Feb 4, 2010
How can you color a single item in a windows datagrid (Windows datagrid 2.0 for Visual Studio 2005)? I tried the overrides paint function but it is very memory intensive for it hits the function each time you move from one cell to another.
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Aug 21, 2009
i have an database and i have a table there name ad "product_order" i have created a form like attached picture..i want o view all of items in datagrid view where customer_id ( a column of database table) = label value of your id and when i will click to view this form this form will load automatically..
Public Class Form8
Private Sub Form8_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
End Sub
[code]....
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May 3, 2010
I have a listbox and a Datagrid, both bound to a database. The listbox contains Names, and the datagrid contains the records of those names. I am tryin to filter out the datagrid, so when i click on one of the names , it will only show those records. Right now when i click on one of the names, it displays that record, but im still seeing the rest of the records from the other names. i know it something like
work_Order.DefaultView.RowFilter = "Name='" & NamesListbox.SelectedItem & "'".
datagridview1.DataSource = work_Order.DefaultView
work_Order = name of the table
Where would i insert the code in? on the form, or on the grid properties?
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Sep 8, 2011
I'm having an issue wherein after I run a search filtering a datagrid, the corresponding datadetails will not update anymore when a new item is selected in the datagrid.I would like it so after clicking an item in the datagrid, the details update automatically.
[URL] The problem is, after running a search (or hitting 'show all') the label/details no longer change when selecting a new item in the datagrid.[URL]
Private Sub Sheet1BindingNavigatorSaveItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs)
Me.Validate()
Me.Sheet1BindingSource.EndEdit()
[code]....
To clarify, the search itself filters the datagrid perfectly as intended....it just seems to stop the details from updating when new items are selected which is my problem.
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Jun 2, 2009
I am using a DLL in my application that will probably be experiencing frequent updates. I want the DLL to detect the new version (I know how to do this), load the new version of the DLL into memory, and continue running. Is this even possible? So I need to know how to: Unload the current DLL. Load the new DLL. If possible, do this from the DLL in question. Is this even possible? If not, how close can I get to this?
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Mar 29, 2012
i have a problem with loading forms in VB and i was hoping someone can help me. this is the code i made:1st form.form name: formload.vb [code]now the thing is whenever the loginform appears when i successfully entered the accounts the form the userinterface will appear and the loginform disappears for a few seconds then reappears again.i wanted the loginform to disappear the only form that is visible is the userinterface.how to make database of accounts where the login form depends on?
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May 6, 2009
I've got a database that's 13,000 lines long and I'm trying to load this into a string array when the program loads but it takes approx 5-6 minutes for it to load it.I've got a MS Access database or an Excel file that I can load this information from, each has two rows: SVONo, Description This is my current MS Access
[code]...
Does anyone have any idea of how to make it faster? Or does anyone have a better way?I did have the idea of loading it by letting the user select the first letter and then only loading the ones that begin with that letter but I've got 4000-5000 'S' ones and it still takes about 2-3 minutes to load it All I want is to load the data from the database or the excel file and then put the products into 'cboProducts' and the 'cboProducts AutoCompleSourceList' and the descriptions into the 'txtDescriptions' AutoCompleteSourceList and a string array.Then when the user selects a product using 'cboProducts' the description will automatically be put into 'txtDescription'.
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Apr 2, 2012
I am doing a project for part of my coursework which involves the creation of a series circuit designer.
I am having some trouble with the saving and loading functions; I had intended to save them to a text file with commas separating the component name and the value (if any) attributed with it.
Grid(xcoord, ycoord, 0) contains the component name. Grid(xcoord, ycoord, 1) contains the attached value (resistance or voltage- components such as wires have a value here of 0)
Once the save button is pressed, the text file contains 50 rows of "0".
P.S. Let me know if any other parts of my program are required.
Dim comp(maxsize) as ccircuits[globally declared]
Const maxsize = 50
Structure ccircuits
[Code]....
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