Unable to find the requested .Net Framework Data Provider. It may not be installed
Solution 1
Try running this to get a list of installed providers, and check yours is there:
// This example assumes a reference to System.Data.Common.
static DataTable GetProviderFactoryClasses()
{
// Retrieve the installed providers and factories.
DataTable table = DbProviderFactories.GetFactoryClasses();
// Display each row and column value.
foreach (DataRow row in table.Rows)
{
foreach (DataColumn column in table.Columns)
{
Console.WriteLine(row[column]);
}
}
return table;
}
UPDATE: You need to have the MySQL Provider installed on the target machine, it's called something like "MySQL Connector Net x.x.x" Which you can get from this website
Solution 2
With our applications (ASP.NET, Test, Windows Service), we've had to add the below to our app.config or web.config files (inside the configuration
node) to make this work:
<system.data>
<DbProviderFactories>
<remove invariant="MySql.Data.MySqlClient" />
<add name="MySQL Data Provider" invariant="MySql.Data.MySqlClient" description=".Net Framework Data Provider for MySQL" type="MySql.Data.MySqlClient.MySqlClientFactory, MySql.Data, Version=6.5.4.0, Culture=neutral, PublicKeyToken=c5687fc88969c44d" />
</DbProviderFactories>
</system.data>
Solution 3
If you receive a dialog as follows...
"Unable to Find the Requested .NET Framework Data Provider. It may Not be Installed"
Look in the machine.config files in the following locations…
C:\Windows\Microsoft.NET\Framework\v4.0.30319\Config
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\Config
Remove any empty
"DbProviderFactories" nodes.
Solution 4
For us it was 32 vs. 64 bit process. The server is 64 bit. The ODP.NET (Oracle Client) installed is also 64 bit. Our application compiled with the Target platform "Any CPU" and "Prefer 32-bit" flag SET:
was running as 32 bit process. Once recompiled with the flag un-checked everything started to work.
Solution 5
Embarrassingly, I spent three days trying to solve this error. I had an incorrect "providerName" property on my "connectionString"
Changed from:
<configuration>
<connectionStrings>
<add name="Old" connectionString="Server=servername;Database=databasename;Uid=userid;Pwd=password;" providerName="System.Data.MySqlClient" />
</connectionStrings>
</configuration>
to:
<configuration>
<connectionStrings>
<add name="Old" connectionString="Server=servername;Database=databasename;Uid=userid;Pwd=password;" providerName="MySql.Data.MySqlClient" />
</connectionStrings>
</configuration>
I had specified System.Data.MySqlClient
instead of Mysql.Data.MySqlClient
d'oh!
P_R
Software developer. Interested in new technologies and the world of computing in general. I usually develop my code using C#
Updated on August 10, 2022Comments
-
P_R over 1 year
Hi it is my first time that I publish a project deveolped with entity framework in a remote server. The pages work fine but when I try to access in my reserved area and so, reading a dabatase, I obtain this error
Unable to find the requested .Net Framework Data Provider. It may not be installed.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.ArgumentException: Unable to find the requested .Net Framework Data Provider. It may not be installed.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[ArgumentException: Unable to find the requested .Net Framework Data Provider. It may not be installed.]
System.Data.Common.DbProviderFactories.GetFactory(String providerInvariantName) +1402071
System.Data.EntityClient.EntityConnection.GetFactory(String providerString) +35[ArgumentException: The specified store provider cannot be found in the configuration, or is not valid.]
System.Data.EntityClient.EntityConnection.GetFactory(String providerString) +62
System.Data.EntityClient.EntityConnection.ChangeConnectionString(String newConnectionString) +263
System.Data.EntityClient.EntityConnection..ctor(String connectionString) +81
System.Data.Objects.ObjectContext.CreateEntityConnection(String connectionString) +42
System.Data.Objects.ObjectContext..ctor(String connectionString, String defaultContainerName) +16
shield_trust.db_shieldtrustEntities..ctor() in D:\trust-company\shield_trust\shield_trust\POCO.Context.cs:23
shield_trust.user_login.check_login() in D:\trust-company\shield_trust\shield_trust\user_login.aspx.cs:65
shield_trust.user_login.entraButton_Click(Object sender, EventArgs e) in D:\trust-company\shield_trust\shield_trust\user_login.aspx.cs:25
System.Web.UI.WebControls.Button.OnClick(EventArgs e) +118
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +112
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +36 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5563I have to copy some dll into my bin folder or modify my web.config?