DataSource Controls :: How To Check Connection With Data Base
Apr 24, 2010how check connection with data base? Now I all query put in try and catch. But I need to check only is access to data base
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DataSource Controls :: Connection Pooling And Check Connection State?
Apr 7, 2010In my DAL i have more than 100 methods/Function, each and every method am opening the sqlconnection and closing the connection, this is taking too much of time to establish the connection at every time. So what i expect is one common class will create the SqlConnection that will check if the connection is Broken or Closed then create the connection again else return the connection, how to do this(Also i would like to apply ConnectionPooling).
View 7 RepliesDataSource Controls :: How To Insert The Value In Data Base Using Sql
Feb 8, 2010i want to inser the value in data base ...i am using asp.net in visual studio 2008...i want syntax to insert the datetime,integer ,float,string data type into the data base.
View 3 RepliesDataSource Controls ::inserting The Value In Sql Data Base ?
Feb 27, 2010i want to insert the value in sql data base.in table id coloum is unique.because of this i cant able to select not null type....so i cant able to insert the value in data base.
View 3 RepliesDataSource Controls :: How To Access Remote Server Data Base
Apr 5, 2010I want access remote server data base for my asp.net application my connectin string is
<add
name ="Constr"
connectionString="Server=xxx.xxx.xx.xxx,xxxSQLEXPRESS;Database=ABC;Integrated
Security=True"/>
and Error is
Login failed for user ''. The user is not associated with a trusted SQL Server connection. there is not any user id and password for access data base i already tried Uid=sa;password=sa
DataSource Controls :: Reading A Huge File From Data Base?
Oct 19, 2010I have a 1.5 GB file into a table. I want to read It from server and create a file stream with it for save.
When I use DataAdapter.Fill(DataSet); code OutOfMemoryException occurs.
What should I do for read a hage file from data base?
DataSource Controls :: Retrieve Data From Data Base And Display A Field Based On The Dropdown?
Jul 6, 2010I am in need to retrieve data from data base and display a field based on the drop down is selected
View 2 RepliesDataSource Controls :: Doing A Data Base Lookup - Where Is The Nvarchar Size Of 4000 Coming From
Feb 18, 2011I want to grab some values with a form and then do a lookup via a datareader in a data access class (N-Tier).
I want to return a data list and bind that to a form view control.
Here is some code from the DAL, Business object and search form.
The parameterized query doesn't like the data being passed to it from my web page .
[code]....
[Code]....
Where is the nvarchar size of 4000 coming from ?
Put The Database Connection Settings Into A Base Page Class?
Mar 16, 2010it's possible to put the database connection settings into a base page class so that I can auto-init them on a page. like this document: [URL] but with instructions in VB.net
View 1 RepliesDataSource Controls :: How To Use Two Connection Strings On One Data Adapter
Jun 4, 2010or on one sql statement in VS 2008.
How to use two connection strings on one data adapter
DataSource Controls :: EntityFramework Base Class Inheritance?
Feb 11, 2010I am having some issues with my base class inheritance. I am currently employing Table per Type Inheritance for the following tables:
Database:
Members Table
- Member ID (PK)
- First Name
- Last Name
- Email
- ...
Students Table
- Member ID (FK)
- Credits
- Notes
- ...
Instructors Table
- Member ID (FK)
- Biography
- Office Hours
- ...
My Entity Data Model defines "Member" as the base class for both Students and Instructors, since members can be both students as well as instructors simultaneously. The problem, however, occurs when I attempt to get a list of Members objects. Because the database contains members who are indeed students AND instructors, the following exception is thrown:
All objects in the EntitySet 'CountyCollegeEntities.BaseMembers' must have unique primary keys. However, an instance of type 'CountyCollege.NET.Administrator' and an instance of type 'CountyCollege.NET.Student' both have the same primary key value, 'EntitySet=BaseMembers;ID=10016'.
I am beginning to think that I made a mistake by building these classes to inherit from Member although it has been ideal up until this point. But before I start ripping up all my existing code to remove this inheritance, I thought I would see if anyone has any tricks that would make this work. Any advice as to either how I can get around this error or a more appropriate way to structure my classes would be very much appreciated.
DataSource Controls :: How To Check That Data Reader Is Null
Jun 4, 2010[Code]....
but if table is empty i.e. there is no record for Store_no=storeno then it bill_id = (Convert.ToInt32(reader[0]) + 1); give a Null exception.
I want to set bill_id=1 if there is no previous record in table of that particular store number. then How to do this.
i.e. How to check that reader[0] is null
cmd1 = new SqlCommand(" Select Max(Bill_No) From Bill_Record Where Store_no='" + storeno + "'", hookUp);
DataSource Controls :: Need To Check To See If Any Data Has Been Returned From The SQL Query?
Apr 15, 2010I am trying to run the following SQL query
string strConString = ConfigurationSettings.AppSettings[ "conString" ];
myConnection = new OdbcConnection(strConString);
myConnection.Open(); // open connection
string strSelect= "select * from tbl_howells_product_data where title like" + "'" + strsearch + "%" +"'" + "order by product_id asc";
OdbcCommand myCommand = new OdbcCommand(strSelect, myConnection);
dtrReader=myCommand.ExecuteReader();
The problem is I need to check to see if any data has been returned from the SQL query, if there are no rows/ data returned by the query then I need to display a message to say that there aren't. I know that there isn't a 'number of rows method' for the dtrReader, so does anybody know how I could do this?
DataSource Controls :: Deleting All Child Record On The Base Of Primary Key And Foreign Key?
Apr 20, 2010how can i retrieve the all foreign keys against a single primary key. i mean to say that if a table contain a primary key then it becomes as foreign keys in which tables.
i want to take that nam of that tables and on the base of that tables then i am to delete from all the entries. e.g: if a primary key's column entry deleted then all foreing key entries should also be deleted.
there are 988 tables in a single database. it can't be possible to go for each table to setup foreign key to ON DELETE CASCADE.
.can it have any way to delete against foreign key priority wise? mean to say that parent table contain primary key, child table contain foreign key , now there is another child table which dependent previous child table. then how can i delete all record against it?
i want to do it from programatically. i am using sql server 2005
i have completed this till to that , it retrieves all foreign keys but how to delete now on the base of priority.
[Code]....
DataSource Controls :: Visual Studio 2008 Data Connection Port Number?
Apr 7, 2010How do I specify a port number for a Data Connection in the Server Explorer of Visual Studio 2008. It would use 1433 as a default but the administrators changed it for security purposes.
View 2 RepliesDataSource Controls :: Error When Using Inbuilt Data Connection In Visual Studio 2008?
Jul 11, 2010Failed to generate a user instance of SQL Server due to failure in retrieving the user's local application data path. make sure the user has a local user profile on the computer. The connection will be closed.
View 1 RepliesDataSource Controls :: Connect To Different Data Providers (Oracle And SQL Server) Using Single Connection String?
Jun 29, 2010How to connect to different data providers(Say Oracle and SQL Server) using single connection string?
View 1 RepliesDataSource Controls :: Variable Connection String Parameter In A DataSource Control
May 20, 2010I have several web forms which use a GridView linked to a DataSource control which is defined at design time as follows:
<cc1:pgsqldatasource
id="dsStates"
runat="server"
connectionstring="<%$ ConnectionStrings:PgSqlConnection %>"
oldvaluesparameterformatstring="Original_{0}"
providername="<%$ ConnectionStrings:PgSqlConnection.ProviderName %>" >
</cc1:pgsqldatasource>
As you can see, the connectionstring parameter is defined to a specific connection string name and I need to be able to set such a parameter to a different value, for example, to a session variable content.
DataSource Controls :: How To Use Server.MapPath As Datasource While Creating Connection With OLEDB
Nov 15, 2010i am trying to create connection using OLEDB connection in my app. but i am not able to create the connection as in datasource i want to use Server.mappath, but cudn't find the right method to use it. i am trying to make connection with Access database file. following is code i have tried:
string path = Server.MapPath("~/uploadaccess/Production.mdb");
string ConnectionString = @"Provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & Server.MapPath("~/uploadaccess/Production.mdb")&";";
and also
OleDbConnection myConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & path&";");
and tried this
OleDbConnection myConnection = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("~/uploadaccess/Production.mdb"));
and this is the error i am getting:
Operator '&' cannot be applied to operands of type 'string' and 'string'
DataSource Controls :: Conflict Detection - CompareAllValues Option But Use Only 1 Field To Check Data Changes?
Feb 16, 2010I have a simple sql server table with around 20 fields in it. I have created an asp.net page which shows the ecords in a gridview & then the selected record in a formview. There may be cases of multiple users editing the same record so i wanted to use the conflict detection in a sqlDataSource to inform users of the conflict. I managed to get this working where i replicated all 20 fields to create the equivalent original_XXX parameter.
BUT i was wondering whether it is possible to show all 20 fields but only use 1 (the date modified field) to check for data conflicts? I have tried to implement this in the following way:
[Code]....
But i've had no luck in getting it working. The conflict detection simply overwrites the changes instead of not allowing the changes and showing the specified error msg (in the onUpdated event). The examples and tutorials i've seen all seem to indicate that each field would need to be compared BUT why can't i simply compare a datetime field which records the last time a record has been updated? Surely, there has to be a better way of resolving the data conflicts than comparing every single field with it's original value?
Forms Data Controls :: SQL Error While Establishing Connection: 40 - Could Not Open A Connection
Jun 5, 2010I previously used a datasource and a connection string to connect to my database on sql server and all orked fine. The connection string was saved in my web.config file and is: ....
View 1 RepliesForms Data Controls :: ListView Connection Error - Database Schema Could Not Be Retrieved For This Connection?
Jul 23, 2010I am using VS2008 and oracle 10g ODP.Net. The oracle database that I used in the connection is working and tested it using sql plus.The connection string when used in a GriDView works perfectly. Now when I created a new listview control with the same connection it gives an error.Database schema could not be retrieved for this connection. Please make sure connection settings are correct and the database is online
Object reference not set to an instance of an object at VSDataObjectSupport (478,6)
Visual Studio :: Error Unable To Add Data Connection. ExecuteScalar Requires An Open And Available Connection. The Connection's Current State Is Closed?
Sep 13, 2010I'm using Visual Studio 2008, and my database is SQL Server 2000.
I want to add a connection to the Server Explorer in VS. The Data source is Microsoft SQL Server (SqlClient). After entering in all my information and I click Test Connection, it is successful.
But when I click OK, I get the error:
Unable to add data connection. ExecuteScalar requires an open and available connection. The connection's current state is closed.
DataSource Controls :: Ftp Connection Through Asp?
Feb 23, 2010i have an asp page through which i want to access FTP server And retrieve data (only file properties )from there and get it in excel (or just display it on the browser)is there any way i can keep it simple and acess the data from the server ???
View 1 RepliesForms Data Controls :: Update A Date Field When Check Box Check In Detailsview
Jul 15, 2010I have a detailsview with an update button one of the update fields is a checkbox which when is checked I want to automatically update a date field of when the checkbox was checked, am I going the right way with this code....... as I am getting a number of errors
Dim i As Integer
For i = 0 To detailsview2.Rows.Count - 1 Step i + 1
Dim row As GridViewRow = GridView1.Rows(i) [code]....