I'm using the following function to generate a list of users connected to a selected database. How would I change this to a single line for multiple identical results?For example: "sa (3) - MYCOMPUTER" rather than listing "sa - MYCOMPUTER" three times?
Function ConnectedUsers(ByVal SelectedDatabase As String, ByVal SelectedInstance As String)
Dim myCommand As SqlCommand
Dim dr As SqlDataReader
[code]....
I'm having trouble lining up data from a file with their respectable columns in a list box. I am using print zones to space out data evenly, but when i run the program the output is still messy. So I need lining up columns properly together. As of now, the first 2 list box items line up with each other perfectly, the data i am looping through to add to list box is not lining up correctly. I have changed my zones several times, but still no luck.
A chunk of my code (some) :
Dim fmtstr1 As String = "{0,-5} {1,20} {2,7} {3,7} {4,7} {5,7} {6,7} {7,8} {8,12}"
Dim fmtstr2 As String = "{0,-5} {1,20} {2,7} {3,7} {4,7} {5,7} {6,7} {7,8} {8,12}"
Dim fmtstr3 As String = "{0,-5} {1,10} {2,7} {3,7} {4,7} {5,7} {6,7} {7,8} {8,12}"
[CODE]...
my listbox contents output as 1 whole row like:Total Normal = 3 Total High = 5 Total Low = 6When i want the output to be formatted like:
Total Normal = 3
Total High = 5
Total Low = 6
[code].....
Ex) Dim fmtstr as string="{0,15}{1,10}{2,8}" if I understand correctly the leftmost number is the zone number and the number to the right is the character width?
View 5 RepliesIs there a rule of thumb used to set the character width of a zone?
For example:
Dim fmtstr As String = "{0,-10}{1,12}{2,14}{3,12}"
lstcolleges.Items.Clear()
lstcolleges.Items.Add(String.Format(fmtstr, "College", "enrollment", "endowment", "public ss"))
This will align the text nicely into a list box. How do I determine how to set the character width?
I am currently trying to save a piece of data extracted from a piece of hardware in my office and save it as a text file. The problem now is, the text file saves the data like this:
[Code].....
I tried and tried to understand it. but i need a simple explaination....
View 1 RepliesI have been searching for a way to format output using writeline/write (streamwriter)using RTF tags and wondering if there is a syntax for this, if it exists. I have not been able to find a resource which clearly explains how to "pretty" up output sent to a file.
The reason why I am asking is because I want to "print" results from my program into a file that, at the very least, would be centered, tabbed and even bolded where possible without requiring the user to go and futz with it. I think I saw that Crystal Reports won't work with VB 2010 Express and, quite frankly, just want to create a file with output.
[Code]...
So I'm attempting to get three variable to print in a string, but I can't figure out how to make the Concat or Join commands to work properly. I've tried assigning the strings to a defined string variable and then "concatting" that and trying to do it in one big line. I keep getting an error either way. Here's what I have so far:
Str1 = PaymentNumInteger
Str2 = NewBalanceDecimal.ToString("C")
Str3 = MonthlyIntPayDecimal.ToString("C")
[code].....
I am building an XML string programatically using the XmlWriter ...
sb = New StringBuilder()
writer = XmlWriter.Create(sb)
writer.WriteStartDocument()
[Code]......
I want to be able to output the XML to a TextBox control on a ASP.NET webform. When I do output the XML I don't get any line breaks or indentation in the XML. The XmlWriter does not seem to have any properties to set formatting. Is there anyway to retain formatting and indentation?
I am currently trying to save a piece of data extracted from a piece of hardware in my office and save it as a text file. The problem now is, the text file saves the data like this:
[code].....
There are 3 buttons and 5 textboxes in my program. ignore the "plot" button as that is a machine specific code, as well as any weird lines like
Dim mgr As Ivi.Visa.Interop.ResourceManager
as these were provided by my machine vendor. I only need help with the data formatting.I am trying to program the "Agilent 8757D Scalar Network Analyzer.
I would like to have my output in columns, and the numbers in two digit after the decimal.
I am writing a data validation app where the app asks the user for input like give me a number of double type: and hopefully the user will comply.
But the app will test some validation rules and then:
1) if the user simply pressed enter the app will tell the user all sorts of reasons why the input was rejected. And that part should look like a table with columns for the entry, if it passed true, otherwise false and then the reason line empty input. Or this number is a string.
How to format numbers in VB.Net. All I want is properly inserted commas in my final output. Such as:
lvwItem.SubItems.AddRange(New String() {ConvertToMegabytes(CULng(LogicalDrive.TotalSize)).ToString})
I have three functions which I use to convert various numbers to MB GB and TB. I would like to have the final output number be properly formatted with commas as necessary.
Private Function ConvertToMegabytes(lngbytes As ULong) As String
Return (CDec(lngbytes) / 1024D / 1024D).ToString("F1") & " MB"
End Function
Private Function ConvertToGigabytes(lngbytes As ULong) As String
Return (CDec(lngbytes) / 1024D / 1024D / 1024D).ToString("F1") & " GB"
End Function
Private Function ConvertToTerabytes(lngbytes As ULong) As String
Return (CDec(lngbytes) / 1024D / 1024D / 1024D / 1024D).ToString("F1") & " TB"
End Function
how to pull/fetch data from SQL DB using Data Reader and loding to XML file.
After that I will have write code to read XML file and download to CSV file and Test files.
can data reader be used as a data source for a grid control?
View 5 RepliesI have a data reader "dr " that returns a row fo data, Assume dr returns values of 6 columns I need to create an instance of DatarRow using "dr", so that later I can create a collection of datarow objects that I will be adding to a table. However, how do I create a DataRow using dr object?
View 1 RepliesCurrently i am using this code
[Code]...
How do I really use data reader in vb.net. I'm using odbc to connect mysql and vb.net. Function I declared on a module:
Public Function form2search(ByVal drugname As String) As OdbcDataReader
cmd.CommandText = "SELECT * FROM drug WHERE Drug_name LIKE'%" & drugname & "' "
Return cmd.ExecuteReader
End Function
[Code] .....
I see a result, but it only loads the first item on the database. I've put this code in the text_changed event. What's the proper way of doing this? And what's wrong with the 2nd code, why is it only loading the first data. As you can see the con is the module where I declared the function. Then I created an object of it in the form.
I want to launch a application called Foxit Reader pdf Reader .I know System.Diagnostics.Process.Start(path) can do it but . Requirements are Foxit Reader should be installed on machine.Now if it is installed how to serarch for the path of its Executable to provide the parameter as I can not hardcode the path for different machines.
View 3 RepliesI am using SQl data reader to get value from SQL database.Language VB.NET.After getting data into reader, i run a while loop
While reader.Read
If reader.HasRows() Then
/* Proessing of data *[code]....
Are there any examples on how to implement a datareader? I have try copying the code from MSDN but;--"Dim reader as SQLDataReader = command. ExecuteReader()"Where it is placed? As a declariton at the beggining of a form? or as as VB resource?and then how those it bind a to a dataGridView? How can I loop through each rows once is bind to use the contents of the column/row?I can perform the above function easly inside of MS Access using VBA. I have gone through various books from WROX but none of them show a clear example or the code is obsolete.
View 5 RepliesI'm switching over from PHP to vb.net. And some of the concepts are a bit different. Mainly I struggle with concepts and keywords, so it hard to look stuff up. Currently I'm creating a dashboard and needs to run a lot of different sql queries. But I see where I should be able to minimize my code. But things that I have tired don't work. Example below of two chunks of code that I should be able to put in some type of loop and increment a value for my sqlstring and textbox output.
[Code]...
i have create a procedure to return data reader value, but it not return and returning null reference?
'Public Shared Sub GetData(ByVal Tablename As String, ByVal queryfield As String, ByVal Id As String, ByVal lblmsg As Label)
' Try
' Dim Cons As OleDb.OleDbConnection = DBHelper.GetConnection
' Dim Com As OleDb.OleDbCommand = New OleDb.OleDbCommand("Select * FROM [" & Tablename & "] WHERE [" & queryfield & "]=" & Val(Id), Cons)
[code]....
I'm using VB 2008 to received data from serial port (RFID Reader). below is the coding that i used. the problem's, the RFID Tag number does not display on the textboxt. [code]....
View 11 RepliesHow can i check if some value exists in the data reader
View 7 RepliesI have the first form and create 5 checkboxes which are connected to my db. Whichever checkbox is checked and the value will be inserted into the db (value: 1; data type: tinyint).And now, the second form will pull out the data base on the which checkbox is checked when the button is clicked. But for somehow i got stucked at the following code.
The first form:
Dim nValue As Boolean
If chkbox5.Checked = True Then
nValue = 1
[code].....
I have a column ("Notes") in a sqlexpress database as nvarchar(1000). It will basically hold notes. It is pulled froma richtextbox control.[code]...
View 2 RepliesI'm having a bit of trouble developing my login page! Currently i have 2 text boxes which a user can input a username and password. My form should then check whether this data relates to the data in the database and either grant or deny access.The error i'm receiving occurs at the line "If theDataReader.HasRows Then"It says 'The data reader has been used before it is assigned a value"
Here is my code:
Imports
System.Data.SqlClient
Partial
[code]....
How to populate a combo box using SQL Data Reader in DAL, BAL and UI atmosphere. Please find below my code snippets and correct me if I'm wrong anywhere in this code.
'DAL Code
Public Function PopulateComboBox() As SqlDataReader
_cnCon = New SqlConnection(_conString)
_cnCon.Open()
[Code]....
What should be the UI code? Is the code specified in DAL and BAL is correct? I knoiw how to fill the combo box with values from SQL Data Reader. But I dont know how this can be done in 3 Tier application.
I have a table in my database and I want to return the rows in a data reader and retrieve them in variables. I can do that well but I can only return the last record. The reader doesn't process all the rows.
Try
Dim myconecction As String
myconecction = My.Settings.DataSource
[Code]......