Basically I have a datagridview that holds data. All I want to do is have the user type in a string to an inputbox then search the datagridview for what the user typed in.This is what I have so far really I think the only thing I need is the piece after if dgbcollectionitem.(i need what goes here). after that I'll use an else statement for error checking.[code]
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I am using the IndexOf function of the string class to find a specific instance of a string. And based on that I have a logic to do something. Below is the example of what I am doing. The code is in production and is working fine. But for some instance I am getting an "Object reference not set error". Yeah its intermittent.The requestXML is a string of xml data passed in as a paramter to a subroutine. I am fetching the xml string as a form post in a request object. The only thing I could think of getting this kind of error is when the requestXML string varia
requestXml = Request("requestXML")
SubmitRequest(requestXml)
Private
Sub SubmitRequest(ByVal requestXml
[code]....
This is something that has been bugging me for a while as it is easily fixed but not desirable.I have a DataGridView that has 5 columns. The first is called ID.In vb.net the following line gives an error "Object reference not set to an instance of an object": dgvJobs.Columns("ID").Visible = False ' ERROR dgvJobs.Columns(0).Visible = False ' OK
Obviously using the name is much better than a hard coded value to reference the column but wondering if there is anything i can do to get this to work correctly?The datagridview datasource is BindingSource control with the datasource being a dataset.
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I have the following function to find a SQL Server instance. It works fine on local computer. Would you please tell me how to use this function to check an instance on other computer on a Local Area Network? I am using VS 2008 (.NET Framework 3.5) and SQL Server Express 2005.
Private Function MyInstanceFound(ByVal MyInstanceName As String) As Boolean
Dim InstanceFound As Boolean = False
Dim MC As ManagedComputer = New ManagedComputer()
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i'm currently trying to test a program at home that i've written for an assignment at university. At the university they have a dedicated SQL server that i can connect to fine enough but to test and debug at home i have installed MySQL 5.1.
I now have trouble connectioning to MySQL the error message i get points towards that my program is acutally looking for an instace of MS SQL server and i don't know where to change this.
I have downloaded and installed "MySQL ODBC Driver-MyODBC 3.51" which some people have suggested corrects the problem, unfortunatly this doesn't work.
The current code i have is:
Dim strConnBuild As New SqlConnectionStringBuilder
With strConnBuild
.DataSource = "localhost"
.InitialCatalog = "northwind"
[code]....
I can't find any properties of the SqlConnectionStringBuilder that indicate what instance and protocalls it should use.
Basically, I've got this plugin-based application I've used all the time in VS2008 flawlessly. In my current project (VS2010 by the way) I wrote a plugin for the application and whenever I try to use an instance of a particular class (in an external dll) from my plugin, I get an error.
I tried watching the instance and I got the message:
"Cannot find the method on the object instance."
in the watch window. This has never happened before! I also found that some of the extension methods in the plugin does not work.
I have an application that allows the user to conduct database backups and restores. The users had been using Windows XP, with network security that allowed users to read the registry. For restores, the installation path to the SQL Server named instance was easily found by looking up the instance name in the registry using
restoreDir = My.Computer.Registry.GetValue("HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\" & m_DatabaseInstanceName & "\Setup", "SQLPath", Nothing).ToString
They have recently upgraded to Windows 7, and locked down the registry so that users can not read values from it. Is there a way (via code) to find the path to a named instance of SQL Server, so that the app can automatically place the database files (mdb & ldb) in the correct folder?
how can you create find & find next (using tooltip menu) create in vb.net for datagridview value.
View 1 Replieshow to set string content as a class instance name?Example. I have an INI-class with many instances like .Path, .Width, etc. Now, i'm reading my ini-file string by string wich hase been written by template:
[code...]
I would like to automate reading an assignment at ONCE. Like cutting the first word in line and setup it as my INI-class instance name.I know how to cut first word, but have no idea, how to set this string as instance name.
how to pass string between forms instance throw the instance it self not any other form
View 6 RepliesI have a single text file and I need to search the file for any instance of the
string (Product_Type: "Hardware", "xxx", "xxx") the Product_Type is constant and has several instances within the file but the "Hardware" changes. I need to show all the values inside the quotes of the "Hardware" string to a listbox.
The Data looks like this:
Quote:
057359-001 Pip Drt329 Auburndale, Fl (aub) - Pompano Beach, Fl (pob) 1:0 10gbe Lan Phy.
MyArr(0) ends up "057359-001" which is correct.
MyArr(1) ends up "Pip" only which is incorrect.
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Using VB.NET, Is there a way to do this RegEx call in 1 step... instead of 2-3? I'm trying to find the word "bingo", or whatever is between the START and END words, but then also inside the inner FISH and CAKES words. My final results should be just "bingo".
Dim s1 As String = "START (random string) FISH bingo CAKES (random string) END"
[Code]...
I am getting some wierd errors when using the ReportViewer control in Visual Studio 2008. When I try to access the LocalReport property, it displays with this error: "Cannot find the method on the object instance.". Also, I am getting invalid cast errors saying I cannot cast from Microsoft.Reporting.Winforms.ReportViewer to Microsoft.Reporting.Winforms.ReportViewer. I am getting this using either CType or DirectCast. This is really frustrating as I can find almost no documentation on this error.
View 1 RepliesIs it possible using Reflection or some other method to obtain a reference to a specific class instance from the name of that class instance? For example the framework for the applications I develop heavily uses public class instances such as:
Public bMyreference as MyReference = new MyReference
Then throughout the application bMyReference is used by custom controls and code. One of the properties of the custom controls is the "FieldName" which references a Property in these class instances (bMyReference.MyField) as a string. What I would like to be able to do is analyze this string "bMyReference.MyField" and then refer back to the actual Instance/Property.
In VB6 I would use an EVAL or something simular to convert the string to an actual object but this obviously doesn't work in VB.net. What I'm picturing is something like this:
Dim FieldName as String = MyControl.FieldName ' sets FielName to bMyReference.MyField
Dim FieldObject() as String = FieldName.Split(".") ' Split into the Object / Property
Dim myInstance as Object = ......... ' Obtain a reference to the Instance and set as myInstance
Dim myProperty = myInstance.GetType().GetProperty(FieldObject(1))
Not sure exactly what I need to do to make this work, so my description may be lacking at first.Essentially I am writing a program launcher that recreates itself each time on load. It pulls the data regarding the tabs and buttons from an SQLite database and builds itself dynamically at run time. I get my problem when I pass the tab name through to the function that creates the buttons. I need the name to pull the right set of buttons from the database and I then tried to use the name to place the buttons on the right tab when I create them, but the debugger calls it a null reference because it doesn't point correctly to the tabpage that I'm trying to make it point to (at least that is what I'm guessing). Any ideas on how to make this work right?
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I want to get a string from the richtextbox but here how it goes in programming for example i want to get all class/function and variable names in this given code.
Quote:
Private Function Processstring(ByVal strin As String) As String
Dim astrWords As String() = New String() {"parrot"}
Dim strOut As String = strin
Dim strWord As String
[code]....
how would i get the "processstring" by getting it after the word function?
I was trying to do a simiple, fine a string start position, or a string, and it always returns 0
Dim My_Search_String As String
Dim My_Text As String
My_Search_String = "fsl fwb fcb"
[code].....
I have this class Framework.Asd.Human with a public empty constructor. and i want to be able to dynamically create an instance of it from a string input "Framework.Asd.Human". Is this achievable? (in java and C#)
View 2 RepliesI want to retrieve an object by using a string representation of the objects name. For example lets say i want to change the font of 3 labels on a form programatically. Instead of changing the font property for each individual label like so:
Label1.Font = FontDialog1.Font
Label2.Font = FontDialog1.Font
Label3.Font = FontDialog1.Font
I want iterate through the labels in a For..next loop like so:
[Code]..
I am trying to find the best way to extract parts of a string within a string. Take the following line:
[Code]....
How can I say extract just "16" for the height field?
This my code:
[Code]...
The problem is "(itemsDataGridView.Rows(j).Cells("PriceColumn").Value)" doesn't copy it's value to any variable.
I have a text file lines like this[code]...
I want to split the line accrding to T,C,F,Sand H and load the value in unbound datagridview.[code]...
here is what i'm stuck with i have datagridview and datasource is dataset. Everything is fine no problem.
It has 3 coloumns, ID, Name, City. ID is PK Now I have rowfilter on dataset like this
dataset.tables(0).defaultview.rowfilter = "Name Like '" + txtName.text + "%'" everything is fine till here. it show selected records. now, i have another text box on form which ask for id and search id in datagrid like this dim dr as datarow = dataset.tables(0).findbyid(cint(txtId.text)
in above case if id found then it will dr with row. which is fine. the question is how i can find if current row is in list or not because of filter on dataset.table
I have a datagridview with 1 combobox and 2 textbox. In combobox I show the description. I want when the user update the combobox the program fill the first textbox with the VALUE of the combobox. I have the code to take back the description of the combobox but I don't know how to take the value of the combobox.
Private Sub dataGridView1_CellValidating(ByVal sender As Object, ByVal e As DataGridViewCellValidatingEventArgs) Handles Movement_roller_DDataGridView.CellValidating
Dim headerText As String = _
Movement_roller_DDataGridView.Columns(e.ColumnIndex).HeaderText
' Abort validation if cell is not in the CompanyName column.
[Code] ......
I have following instance of System.Collections.Specialized.NameValueCollection:
Dim UserSelection As New System.Collections.Specialized.NameValueCollection
UserSelection.Add("D_Color1", "Black")
UserSelection.Add("D_Color2", "Green")
UserSelection.Add("D_Color3", "Purple")
I need to save this instance to hard disk and then load it back from hard disk as an instance. How do I do that?
D is a dictionary whose entry values are of Type T..What I'm attempting to do is have a delegate like "Serializer" below that I can invoke on an instance of T, such as "Entry.Value" below.Please see the "return Entry..." line below for my wishful thinking.[code]
View 2 RepliesI am looking for a way to make my app running in a single instance mode and showing the MainWindow of the first instance when another instance is launched.I do a quick search on the internet but I did'nt find anything to open the MainWindow of the first instance or it was for Windows Form not for WPF.
View 1 RepliesI am using VB.NET 2008 My DataGridView is bound to a DataSet. After adding a DataGridView row (from another form), I needed to sort the DataGridView in order to put the new row in the appropriate place. I needed to be able to identify the current sort column and the current sort direction (ascending/descending) but I was unable to find out how to obtain that information from the DataGridView properties. Consequently I had to do it the hard way via my own coding. The sort column name (or names) and the sort direction then became available to my program in the global variables.
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i have datagridview and datasource is dataset. Everything is fine no problem.
It has 3 coloumns, ID, Name, City. ID is PK
Now I have rowfilter on dataset like this
dataset.tables(0).defaultview.rowfilter = "Name Like '" + txtName.text + "%'"
everything is fine till here. it show selected records.
now, i have another text box on form which ask for id and search id in datagrid like this
dim dras datarow = dataset.tables(0).findbyid(cint(txtId.text)
in above case if id found then it will dr with row. which is fine...
the question is how i can find if current row is in list or not because of filter on dataset.table
