DataSource Controls :: Write MVC Application To Access Multiple Data Stores?
Mar 17, 2010
I would like to write an MVC application that accesses multiple data stores (SQL Server, MySQL, Cloud based, etc.).Most of the examples I see use LINQ to SQL for their data access but I read somewhere that LINQ only supports SQL Server - it may have been an old post.I was wondering what the best way to access these different data stores would be. Can I use the Data Access Application Block from MVC to access these data stores?
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Similar Messages:
May 6, 2010
I have to write data to multiple (two) tables.
tbl1 has a column "ORDERID" with auto increment. I have to get this "ORDERID" whenever I write to tbl1 (Insert new record)
tbl2 has a coumn "ORDERID" as foreign key, I have to write "ORDERID" in tbl2 received from the tbl1.
How to do it using SQL ( I am not using StoredProcedure)
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Dec 5, 2010
I am writing an ASP.NET application that suppose to connect to many different data stores and query them for data. Each data store contains different data: it can be an SQL DB, an XML file, or anything that can store data. The result is always an XML.
The remote data stores expose a WCF service (which I will also implement) that will allow me to query the data store and return the results.
My question is: how exactly should I implement the querying mechanism? Should I define my own query language?
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Jun 17, 2010
I have a situation where I am accessing a database multiple times and I'm wondering if it is necessary.
I have a GridView with a template column with a hyperlink to "Get Results" and on the RowDataBound event I have it check the batch number against the database and see if results exist and then if they don't, hide the link.
So when viewing the page if there is 20 rows in the gridview it is effectively doing 20 queries.
I was wondering if it is a better idea to query the database once with all "batches" and load it into a datatable, then on the RowDataBound event query the datatable. The only issue I see with this is there is currently 40,000 batches and grows daily.
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Feb 9, 2011
my page is very simple, one gridviews and one ObjectDataSource.here's my code :
<%@ Page Title="" Language="C#" MasterPageFile="~/site.Master" AutoEventWireup="true"
CodeBehind="default.aspx.cs" Inherits="cHospital._default" %>
[code]...
I also posted my question on another web site, one suggestion I got is move my codes to codebehind
(http://entlib.codeplex.com/Thread/View.aspx?ThreadId=245208)
But this is ObjectDataSources, my understanding is everything have to stay in Class file.
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May 27, 2010
In of my application I am using the database to store and retrive images. The table stores the documents and the datatype of the field is IMage.
Now with Sql Server 2008, i would like to upgrade this to use this new feature. WHat changes do I have to make in terms of code and also in the database.
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Mar 23, 2010
I am using visual web developer 2008 vb code.The Code I used is like this. it works but doesnt Store or SaveI am using Formview / DetailsView in "Insert" ModeWhat I want is that When I finish writing The Date The Discription Row 2 = "Paid" and Saves or Stores
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May 19, 2010
I currently store ASP.net application data in XML files. Now the problem is I have asynchronous operations, which means I ran into the problem of simultanous write access on a XML file... Now, I'm considering moving to an embedded database to solve the issue. I'm currently considering SQlite and embeddable Firebird. I'm not sure however if SQlite or Firebird can handle multiple concurrent write access. And I certainly don't want the same problem again. Anybody knows? SQlite certainly is better known, but which one is better - SQlite or Firebird ? I tend to say Firebird, but I don't really know. No MS-Access or MS-SQL-express recommodations please, I'm a sane person.
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Apr 22, 2010
I need to allow my asp.net application to read and write from and to a folder.
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Oct 21, 2010
I have a few websites that should access a central location (folder) on a different domain that stores pics. In previous version of this system I stored each pics folder under the same domain and I could access the files with FileInfo
Dim fi As FileInfo = New FileInfo(MapPath(img.ImageUrl))
How can I ger the file info for a file in a different domain ?
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Feb 15, 2010
We need to secure how our web application access our SQL 2008 database on our hosted server. Any pointers where this is covered in detail? We have the following questions:1. right now the network service account runs the application pool containing our application in IIS. Should we define a local windows user account to run this application in IIS 6? Should we switch to Windows authentication?
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Nov 8, 2010
I need to read a table from a dtgrid there is one code for example?
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Jun 4, 2010
Would it be better to have a sp return multiple result sets and use NextResult() or have subsequent call to dr.execute.... () and hadle one result at a time?
To me using nextResult() on a multiresult datareader would be cleaner and easier - but it does not seem to be very "atomized". I guess I am wondering can the cost of executing multiple commands be neglected? Seems like executing multiple commands and receiving a single result set would also be easier to read/test/understand.
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Sep 20, 2010
I have a dropdown list inside gridview which has a object data source and I am adding the list items as true, false which stores in the database table as a bit value. Even if i am addin the values 1 and 0 to the drop down list, its throwing the below error'grdDebug' has a SelectedValue which is invalid because it does not exist in the list of items.Parameter name: value My code to add the dropdownlist with list items are as below
<asp:TemplateField HeaderText="Debug">
<ItemTemplate>
<asp:DropDownList ID="grdDebug" runat="server" AutoPostBack="false" SelectedValue='<%# Bind("Debug") %>'>
[code]...
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May 5, 2010
I have couple of DDL's which let user choose couple of different values from it. Once the user has made his selection he clicks on the "Submit" buttion which redirects the user to the other page, which then displays table from backend SQL DB. The pages are named Page1.aspx and Page2.aspx resp. I am using Querystring to carry forward the values of the DDL's to Page2.aspx.
How can i modify the query in such a way that even if one of the DDL's is left blank the Query would ignore that and shall produce the table considering value of DDL2 in the where clause. In case both the DDL's are empty then the query will not have a where clause and shall showcase the complete table as such. I've written a query for this but it's not working the way it shoul.Here is my code for the SQLDataSource: [Code]....
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Nov 4, 2010
i have an Asp.net application 3.5. I want to be able to allow multiple/ different clients to access the same application but using different url's. I have already managed to configure the database to allow this. So hia's the main part i want to host my application in a domain say... wwww.myapplication.com
then allow different client to access the same application using
1.www.clientOne.myapplication.com
2.www.clientTwo.myapplication.com
also the client subdomains i.e(clientone.myapplication.com and clienttwo.myapplication.com)should be autocreated by the client upon registration
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Feb 17, 2010
Is there anything missing in IIS 6.0 that prevents me from (Insert into table) using MS-Access?
Explain: The application works fine under Visual Studio 2008 IDE the insert into table works fine with no error, Also I tested with hosting provider and works fine with no problem. but now I have published the same exact app in a dedicated server windows 2003 with
IIS 6.0 .NET framework 2.0 with latest service pack I gave IIS_WPG write/modify access to the folder where MS-Access database is located and database but at the time of insert an error pop-up. I need to install in the Server or settings in the IIS to recognize my MS-Access db is it some office runtime that I am missing. (BTW I am using OLEDB connection string in my C# )
Using System.Data.OleDb;
I can retrieve data off of it with no problem but when I try to insert is when it fails I thought the problem was Access Rights but I do not think is the case.
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Jun 30, 2010
I am about to write a method that uses SQLParameter to insert some data into SQL server. However, do I "have" to specify a DBType? If not how is this handled?
Here is an example of the code I intend to write:
[Code]....
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May 5, 2010
Server Error in '/' Application. Attempted to read or write protected memory. This is often an indication that other memory is corrupt.Description: An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.AccessViolationException: Attempted to read or write protected memory. This is often an indication that other memory is corrupt.
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:
[code]....
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May 14, 2010
We have created an ASP application with MS Access as back end. We have implemented this web application on our server machine and accessed the same from on my local machine.
Our application works fine when only one user accesses it (All insert, update works fine). But when multiple users connect to this application and try to update the database, then application get crashed. As per our knowledge, this is happening because of access database get locked, when one user open it in exclusive mode.
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Jan 8, 2011
i have apage with datarepeater, and the repeater has a data source. and in the repeater i have atext box control
i want to give it the value from the data source coulomn ("question column")
like this:txtQuestion.Text = rptrQuestions.DataSource.Columns["Question"].(here is the problem)
what can i write after (Columns["Question"]) to see the value for this column?
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Aug 20, 2010
<asp:SqlDataSource ID="DS" runat="server" ConnectionString="<%$ ConnectionStrings:ConnectionString %>"
SelectCommand="SELECT * FROM [Products] WHERE ([ProductID] = @QSID)">
<SelectParameters>
<asp:QueryStringParameter DefaultValue="" Name="QSID" QueryStringField="ID"
Type="Int32" />
</SelectParameters>
</asp:SqlDataSource>
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Feb 22, 2011
I have defined a public static HashTable. It stores data for a few seconds of runtime, and then data disappears, and then the HashTable becomes null.What is the issue and how do I solve it?
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Oct 15, 2010
I want to be able to access my dataset from other protected methods. So far the only way for me to do this is declare my dataset globally (dataset mydatset = new dataset();) and then within my methods I return the dataset after I'm finished filling it with my SqlDataAdaptor. I don't think this is very efficient. Is there a better way of accessing this. I understand when you give the dataset a table you should be able to access it's value. However the dataset becomes null once another method is called??
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May 18, 2010
can we write stored procedures in ms-access 2007...
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