Winforms - .net Connection Entity Framework Connection String Security?

Sep 3, 2011

I understand the possibilities for encrypting a connection string in .net v4. I have a win forms application that will be used by multiple people on different machines. I understand that I need to protect the connection string at time of the app being first run on the target machine. However I am concerned that for a period of time my connection string will be unencrypted. I am looking for advice in how to deploy my app with the connection string already encrypted or encrypted during installation. encrypting the connection string in a secure way?

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Get Connection To MySQL DB Through The MS Entity Framework

Feb 23, 2009

I am trying to get connection to MySQL DB through the MS Entity Framework and I am not able to. Yes, I can connect to the DB otherwise, using conventional MySQL Connector 5.2.2. I am using vs 2008 and the VS SP1. I have added a VB Forms Project. Now, when I try to add a New ITEM and choose ADO.NET ENTITY DATA MODEL, it asks for the Datasource. Now, here it lists only SQL Server and I do not see the MySQL option at all. I have added the Mysql.data.dll to the project as a reference. Nothing seems to get me the link to the DB via the Entity Data Model Wizard...

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Connection String Persist Security Info?

Jun 27, 2010

does anyone knwos what is the point of persist security info? i have always leave it at default (i'm not sure what value it is) but when i pass the application to my friend he seem not to be able to connect to the db. (btw the application calls

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Entity SQLCE Can't Find Connection String In App.config File

Sep 21, 2011

I've been getting this error when I try and use my model container:

No connection string named 'PFModelContainer' could be found in the application config file.

I have my edmx file in a separate project. I checked the app.config file and my model was there, and I also put it in my main project app.config file. Still doesn't work. Here's the connection string:

<connectionStrings>
<add name="PFModelContainer"
connectionString="metadata=res://*/PFModel.csdl|res:

[Code].....

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Assign A My.Settings.Item Connection String To Cmd.Connection Connection String Value?

Aug 25, 2009

How do I assign a My.Settings.Item connection string to cmd.Connection connection string value?

Dim cmd As New SqlCommand()
cmd.Connection = My.Settings.Item("csStaffHoursWorked")
cmd.CommandType = CommandType.StoredProcedure
cmd.CommandText = "spSaveDeltekImport"

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WinForms - Where To Store Connection String

Feb 17, 2010

I am working asp.net for a few years. In asp.net, database connection string is stored at web.config file. All page can share this connection string. Now, I need to learn how to create windows app. Where to store a connection string, e.g. connect to SQL, to Access DB, so that all windows forms can share it?

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Winforms - Pass Dynamic Connection String To Another Windows Form?

Feb 20, 2012

I am creating a windows application which required Dynamic Connection String in the app starting (user need to provide db credentials through a form), After entering the connection credentials user redirected to new win form Everything is working fine but how can I pass my dynamic connection to another form.I tried to save it to App variable but I couldn't (I think its read only) Also I tried save it to registry but can't retrieve values.Is there any other option available ? like writing & retrieving ConString to a text file or XML.

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The Connection String Could Not Be Found Or Data Provider Associated With The Connection String Could Not Be Loaded

Mar 11, 2010

I got this Error Message while I try to preview the records in Dataset Designer:"The connection string could not be found or Data provider associated with the connection string could not be loaded"

Here is my dataset.xsd code

<Connections>
<Connection AppSettingsObjectName="MySettings" AppSettingsPropertyName="loginConnectionString1" IsAppSettingsProperty="true" Modifier="Assembly" Name="loginConnectionString1 (MySettings)"

[code]....

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Display Connection Properties Dialog For Connection String Browsing(for Database) In Run Time?

Feb 5, 2010

Is there a way to display the connection properties dialog for connection string browsing(for database) in run time?

As I want the user to be able to connect to various database using the GUI.

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Invalid Connection String When Modifying Tableadapter Connection?

Jan 19, 2011

I'm developing an app in vb.net (visual studio 2008). I have a Teradata back-end that will be supporting multiple users in a production environment. I need to use variables in the connection string as the user/pass will be changed every 3 months.

For the gist of the application:

In it's most basic form - I have a search form which works correctly - it pulls results into a listbox and the user then double clicks the list box which will then open a form that is bound via table adapter to the back-end table (Teradata). My connection string is fine everywhere in the application. My problem is using a modified connection string for the "fill" function of the table adapter once the form is opened.

I'm using the code below for the on-load event and keep getting an "invalid connection string" - again, the connection string works fine everywhere else in the app, and the variables etc... are working correctly.

Private Sub adaptertest_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim DBConnStr As String = "Provider=TDOLEDB;Data Source=TDDEV;Persist Security

[Code].....

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Mdb Connection - Transfer File Path In Our Connection String

Aug 26, 2009

I'm facing a problem after installation any software setup that has a database in access(mdb file) How to I transfer file path in our connection string.

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.net - What Is The Connection String For Oledb Connection To Connect DSN

Mar 18, 2012

I am trying to connect DSN from my VB 2008 project. When i try using myoledb.connectionstring="DSN=myDNSname" I get the following error message An OLEDB provider was not specified in the connectionstring.

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Add Security To Tcp Connection?

Feb 23, 2010

I have a simple video chat program running and most of it is working across my network I need to ask

I currently have it setup that whenever each client sends a message to the other a connection opens between them and a packet is sent, finnaly the connection is closed

This way I recive the data is were I belive my security problem comes in I have a listenner port on each computer and I am wondering if there is a way to add some security to it.

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SQLClient.Connection Without Connection String?

Feb 18, 2012

Why doesn't an exception get thrown when this function is called when there is no ConnectionString set for the Connection? I just spent 15 minutes debugging and staring at it and finally figured out it needed the connection string. Shouldn't an exception get thrown?

Friend Function GetValues(ByVal TableName As String, ByVal FieldName As String) As DataTable
Dim cn As New SqlConnection
Dim cmd As New SqlCommand[code].....

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C# - Are Microsoft Entity Framework And ADO.NET Entity Framework (.edmx) The Same

May 13, 2010

c# - Are Microsoft Entity Framework and ADO.NET Entity Framework (.edmx) the same?

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String Searching In Linq To Entity Framework?

Mar 2, 2010

I am wanting to create a Where statement within my Linq statement, but have hit a bit of a stumbling block.I would like to split a string value, and then search using each array item in the Where clause.In my normal Sql statement I would simply loop through the string array, and build up there Where clause then either pass this to a stored procedure, or just execute the sql string. But am not sure how to do this with Linq to Entity? ( From o In db.TableName Where o.Field LIKE Stringvalue Select o ).ToList()

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Asp.net Mvc - Split A String And Insert Each Value As A New Record With Entity Framework?

Nov 9, 2011

Given a string of categories, I need to split the string and insert each separate item as a new record using EF.The following does not work since string cannot be converted to Tag:

Dim s = "Books, Novels, Magazines"
s.Split(", ").ToList.ForEach(Function(x) _rdsqlconn.Tags.Add(x))

How can i split the string and insert each as a new tag record?

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Secure Connection Of .net Winforms Application

Dec 1, 2011

I am developing an .net Winforms application and I need to secure the connection to the sql server 2008 database. I plan to create a webservice as a middle tier that will handle the authentication and that will provide data manipulation. Is there a better way to go with? Does .net have components or tools for that? What is the best technique?

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SqlConnectionStringBuilder Trusted_Connection="SSPI" Does Not Yeild "integrated Security=SSPI" In Connection String

May 12, 2009

I have started using the builder class to create my connection strings for the sole purpose of making more generic connectivity code. However, I am stumped on this issue. The MS eConnect product apparently expects to receive integrated security=SSPI in its connection string if you want to use integrated security, (vs Integrated Secturity=True). I thought I would just pass "Trusted_Connection"="SSPI" to the builder class.

as it turns out, the item for Integrated Security is boolean and despite what the documentation says, will not give me SSPI in my connection string. Has anybody else found this issue and is there a simple fix for it? as for now, I'll simply strip out the item and replace it in my string.

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Asp.net - .NET Framework Data Provider For Oracle Multiple Open Connection

Jan 17, 2012

I have the below mentioned code in a seperate class file for establishing connection and carry out DB transactions. I have an issue where multiple connections being opened which sometime exceed the connection pool. When I stepped through the code I found that there are codes which call ConnectDB() in a loop without calling DisconnectDB(). But I expected that the condition OraConn.State = ConnectionState.Closed should handle the situation. Somehow the condition is always satisfied hence openning another set of connection. Can you suggest where am I going wrong and also what best practice can be adopted here?

[Code]...

The connection is again opened in function updData(). While I understand that it has to be closed correctly but keeping tab on every developer is not possible. Hence I want to control it directly from the connection class by using the same connection but the condition If OraConn.State = ConnectionState.

UPDATE I have put the code in UpdateDB under a Using block and removed call to ConnectDB and DisconnectDB from function like InsertData(...). It seems that the issue has been resolved. But I would like to know in case of exception will the connection remain open? and also OraConn is a public variable defined outside Using block so will it be disposed of by the GC?

[Code]...

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.net - ADO.net Entity Framework - Update Only Certain Properties On A Detached Entity

Jul 22, 2009

I want to update an entity without loading the entity from the database first. I've accomplished this but only by knowing all of the entities properties and then using the "attachto" method. My issues is i don't want my app to need to remember all of the properties. Example:

[Code]....

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.NET Sample Entity Framework 4.2 Code First Entity Splitting?

Dec 14, 2011

Entity Splitting: one class, two or more tables.Here is how it is done in C#, but I need to get it working in vb.net.One more thing: the class name and table columns do not match, so I have to be able to map that out, too.I have to get this to work this way because the place I'm working at right now is a vb.net only shop and the database schema is fubar, but they have so much (millions) of lines of code done directly against the database in both asp classic, vb.net, AND asp.net webforms that changing the schema right now is not realistically possible.

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<Post>()
.Map(m =>

[code]....

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Asp.net - Using ExecuteQuery() With Entity Framework, Entity Class

Jan 16, 2011

I am trying to jump from ASP Classic to asp.net. I have followed tutorials to get Entity Framework and LINQ to connect to my test database, but I am having difficulties figuring out ExecuteQuery(). I believe the problem is that I need an "entity class" for my database, but I can't figure out how to do it. Here is my simple code:

Dim db as New TestModel.TestEntity
Dim results AS IEnumerable(OF ???) = db.ExecuteQuery(Of ???)("Select * from Table1")

From the microsoft example site, they use an entity class called Customers, but I don't understand what that means.

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Error - ExecuteScalar Requires An Open And Available Connection - The Connection's Current State Is Closed

Aug 3, 2011

i have an application. which is executed after every 5 mins. i have an open connection but it gives me the following error:

ExecuteScalar requires an open and available Connection. The connection's current state is closed.

my code is something like this. I have shown where all i am using ExceuteScalar()

Sub Main()
Try
connection.open()
cmd.ExecuteScalar()

[code]....

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Sql Server - .net Program Dataadapter Connection Closes After Fill But Database Still Shows Connection?

Aug 19, 2010

After running the following sub (VS debugger), I try to detach the database in SSMS, but it shows the connection open still and won't let me detach. If I close program in debugger, the database shows no connections. I check the dataadapter's connection in the finally block and is shows closed. What gives

Private Function ClientMasterDBFiles(ByVal MasterClientDBConnection As String, ByVal DBName As String) As DataTable

[Code]...

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[2008] Error - Unable To Read Data From The Transport Connection: The Connection Was Closed

Mar 15, 2009

I have a simple scraper. It works on some websites, but on some there is this Error:

Quote:

IOException was unhandled Unable to read data from the transport connection: The connection was closed

It is occuring at "Dim htmlresults As String = Urlcontents.ReadToEnd()".

'Create the HttpWebRequest object
Dim req As HttpWebRequest = WebRequest.Create(URL)
'Set the timeout to 1 second (or 1,000 milliseconds)
req.Timeout = 10000

[code]....

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Disable The Local Area Connection While Leaving The Wireless Connection Enabled

Jun 21, 2010

I am attempting to write a program that will disable the Local Area Connection while leaving the Wireless connection enabled. My company is using net-books in our stores to demo air-cards and we need to keep them off of the LAN. I'm new to VB and VB.net, and it's been a while since I did any type of programming. I've gathered some code that others have posted in forums and tutorials and I'm working through a tutorial book, but I finally believe that I am stuck.

[Code]...

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ExecuteNonQuery Requires An Open And Available Connection, The Connection Current Stat Is Close?

Nov 30, 2008

i make a class and when i call on form then that error occurs "ExecuteNonQuery requires an open and available connection, the connection Current stat is close "

Class Code isImports System.Data.SqlClientImports System.DataImports System.StringPublic Class DatabaseKits Dim Cn As New SqlClient.SqlConnection Public Function BuildConnection() As Boolean Try Cn.ConnectionString = "Persist Security Info=False;Integrated Security=True;Trusted_Connection=Yes;database=BizAimsPro2008;server=Server-2k3s" BuildConnection =

[code]....

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Networkstream Connection Fails & Httpwebrequest Connection Not Reading Fast

May 17, 2012

I am connecting to a data stream that pushes data continuously and when I tried to set up a network stream I just could not connect and kept getting the 'not found' error. I used the httpwebrequest with webrequest.keepalive = true and started to consume the data by reading into a buffer and then appending to a stringbuilder. Once the stringbuilder reaches max size I flush it to a text file. The problem is that I get disconnected from the data stream because I am not reading the data fast enough. I need to keep the connection open and read the data while ensuring data gets stored in text files. If I use method "CONNECT" it does not connect to the stream.

While (True)
webrequest = DirectCast(Net.WebRequest.Create(url), HttpWebRequest)
webrequest.Credentials = New System.Net.NetworkCredential(username, password)
webrequest.Method = "GET"

[code]....

should I increase the buffer size and if so what is the max? that would mean I can read more data at a time and keep up with incoming push. Disparate here.

ACtually also I noticed that it gets stuck on this line

numbytesread = responseStream.Read(bufferread, 0, BUFFER_SIZE)

and then eventually I get disconnected.

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Networkstream Connection Fails & Httpwebrequest Connection Not Reading Fast Enough

May 17, 2012

I am connecting to a data stream that pushes data continuously and when I tried to set up a network stream I just could not connect and kept getting the 'not found' error. I used the httpwebrequest with webrequest.keepalive = true and started to consume the data by reading into a buffer and then appending to a stringbuilder. Once the stringbuilder reaches max size I flush it to a text file. The problem is that I get disconnected from the data stream because I am not reading the data fast enough. I need to keep the connection open and read the data while ensuring data gets stored in text files.If I use method "CONNECT" it does not connect to the stream.[code]

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