.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Win Surprise Gifts!!!

Top 5 Contributors of the Month
Gaurav Pal
Post New Web Links

storing Datatable(s) as a whole

Posted By:      Posted Date: August 30, 2010    Points: 0   Category :ASP.Net
Hi,I was wondering what is/are the best way to store Datatables, as a whole, in a MS SQL table?for example in  a caching scenario:1. you have 10000 datables2. and you want to store them in a table, per cache key, for future retrieval.I appreciate your thought/comments.Leo

View Complete Post

More Related Resource Links

storing Datatable in Session variable


I am storing Datatable in Session variable in my project. Is it good practise to do so? The datatable has 20 fields and can run into 1000+ records. Will it hamper my application performance? If yes then can anyone suggest better alternative.

How to bind GridView and DropDownList controls using DataTable object

In .net framework 2.0, you can load a DataTable in memory by consuming a data source using a DataReader. In this version you will find the flexibility in accessing the DataReader means write access code once and use again and again using DataReader. To see the functionality of DataTable consider an example that is created using VS2005.

DataTable - Load from IDataReader - CreateDataReader - ReadXml WriteXml - Free ADO.NET Tutorials

The DataTable in ADO.NET 2.0 has been seriously beefed up and I absolutely love it. Not everything we consume deals with multiple resultsets and requires the ever popular DataSet. With the cool new features in the ADO.NET 2.0 DataTable, we can get many of the cool features in the DataSet without all the extra baggage and memory footprint particular to multiple resultsets.

Load DataTable from IDataReader

Storing User Data



I'm trying to get the current logged in UserId Value, using this code

Protected Sub UserProfileDataSource_Selecting(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.SqlDataSourceSelectingEventArgs) Handles UserProfileDataSource.Selecting      ' Get a reference to the currently logged on user      Dim currentUser As MembershipUser = Membership.GetUser()      ' Determine the currently logged on user's UserId value      Dim currentUserId As Guid = CType(currentUser.ProviderUserKey, Guid)      ' Assign the currently logged on user's UserId to the @UserId parameter      e.Command.Parameters("@UserId").Value = currentUserId End Sub

But, I getting an error (NullReferenceException), I did set a url authorization on the page that i try to get the logged in user information, witch is info.aspx, and I made the login.aspx control to be redirected to the info.aspx after the login process, But the info.aspx  only shows me (access in denied), how can i make this page knows that i am already logged in?

Datatable in session


I am creating a simple shopping cart using a datatable that is passed into a session object.  I have a small mini cart that displays the total number of items in the cart as well as the running total - this is displayed in a web control.  When the web control starts up I run a try/catch to see if the session object exists, if it doesn't I create the datatable for the cart and store it in the session.  I then have a datalist control that contains all the information for my products including an "add to cart" button.  When the page loads everything looks fine.  If I click on an "add to cart" button nothing happens to the session information.  If I click on it again, the session information updates - displaying only one item is in the cart and then counts up correctly there after.  Additionally, after adding an item, if I select a different item in the list, the same issue occurs.  I am not sure why this is happeing, if anyone can give me an idea I would appreciate it. 

holding datatable value using session



iam insert record using datable in gridivew,iam using  session to hold the record,

there is any other way to hold the record in datable.


        DataRow row;
        row = dtempty.NewRow();
        row["ratetypeid"] = ddlratetype.SelectedValue;
        row["ratedesc"] = ddlratetype.SelectedItem.Text;
        row["slabs"] = ddlslabs.SelectedValue;   

removing item from datatable


hi to all ..thanks in advance


I have Two datatables dtA,dtB ,both contains column name is "FiledName" I need to remove item

from dtA when same row data exists in dtB.  please tell me how to do it

dtA    dtB   

 A        A

 B        F

 C        C

 D        Z

I want o/p like this







Bulk Copy From Datatable To SQL Server Table


 I have read the data of a excle file and captured the data into the dataset to a datatable, now that data is to be inserted into a SQL Server table using bulk copy option. I am using -

 public bool BulkEnterData(DataTable dt, string tblName)
        SqlBulkCopy bulk = new SqlBulkCopy(con);
        bulk.DestinationTableName = tblName;

        return true;

ERROR Getting-
A transport-level error has occurred when receiving results from the server. (provider: Shared Memory Provider, error: 0 - The pipe has been ended.) 

How to resolve the above problem or any other solution is available.


Serializing XML and storing as XML in Database


Hi All,

I know this may sound a daft question but I'm wanting to save Serialized XML into a databse but for the life of me I cant do it.

So far I have my class

public static void SerializeToXML(Candidate candidate)
            XmlSerializer serializer = new XmlSerializer(typeof(Candidate));
            TextWriter textWriter = new StreamWriter(@"C:\movie.xml");            
            serializer.Serialize(textWriter, candidate);

This basically save the serialized properties in the Candidate class into the movie.xml file which is great but I want it to return XML (so it can be re-used) so I can store the XML in the XML database field

Any help would be greatly appreciated



While Importing Excel 2007 file to Datatable - headerrow problem


Hi there,


I am trying to simply extract an excel data from an uploaded file an put it into a datatable. In this case the excel file has 3 rows but when I fill the datatable I only see row count of 2.

I tried changing HDR:NO; to HDR:YES and vice versa, but no luck. 

What am I doing wrong? (Note: the excel file cannot have a  headerrow)


string connstr = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + pFilePath + ";Extended Properties=\"Excel 12.0;IMEX=1;HDR:NO;\"";
            OleDbConnection conn = new OleDbConnection(connstr);
            DataTable dtTables = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, null);
            string strTablename = dtTables.Rows[0]["TABLE_NAME"].ToString();
            string strSQL = "SELECT * FROM [" + strTablename + "]";

            OleDbCommand cmd = new OleDbCommand(strSQL, conn);

            DataTable dt = new DataTable();
            OleDbDataAdapter da = new OleDbDataAdapter(cmd);
            //At this point row count=2 which doesn't make sense




Conversion of List to DataTable and ViceVersa


hi ,

           Iam having a requirement where I wil get datatable or Dataview from the DataAccessLayer I need to convert them into GanaricList of entites and ViceVersa from GenericList to Datatable or DataView.

             I tried it but I cant. Can anybody help me out.

Data Points: DataSet and DataTable in ADO.NET 2.0


ADO. NET 2. 0 sports some exciting enhancements to the core classes found in ADO. NET 1. x and introduces a variety of new classes, all of which promise to improve performance, flexibility, and efficiency.

John Papa

MSDN Magazine November 2005

Web Q&A: Storing SQL Data, URL Query Length, and More


Find out the best way to store large amounts of XML data in SQL Server, along with the performance implications. What's the maximum length of an XML query to SQL Server in a URL?

Edited by Nancy Michell

MSDN Magazine May 2003

who to load DataRow to DataTable



Who can I copy data from DataRow[] to DataTable....

DataRow[] TempDataRowFilter;



DataTable TempFilterTable = new DataTable();
TempFilterTable.LoadDataRow(TempDataRowFilter, true);

It is error why ?         

Linq query to DataTable


Is there option to convert from Linq.IQueryable to DataTable with some sort of CopyToDataTable() function. I am trying this.
     var row = from p in dc.ProductModels
                  select p;
    DataTable dt = row.CopyToDataTable();

Is there option to convert from Linq.IQueryable to DataTable with some sort of CopyToDataTable() function. I am trying this.

     var row = from p in dc.ProductModels


DataTable --> Oracle DB



Can someone offer advice on the below? 

I am connecting to an AR Server and pulling out data into a DataSet.  There will be 15 different DataTables within the set.  I would like to find a way to either insert the entire DataSet or each DataTable into an Oracle table.  The Oracle table has the same format as the DataTables I'm creating.

 private void button1_Click(object sender, EventArgs e)
                //Get Credentials
                ID = userNameTextBox.Text;
                PW = passWordTextBox.Text;

                connString = gstrConnectBaseLineStart + "UID=" + ID + ";PWD=" + PW + gstrConnectBaseLineEnd; //Connection string
                conn = new OdbcConnection(connString); //Create Connection
                conn.Open(); //Open Connection
                Console.Write("Connection Successful" + "\n");

                dataAdapter = new OdbcDataAdapter(SQL, conn);
                dataAdapter.Fill(IncidentsDataSet, "dataTableTest");

                DataTable dataTable = new DataTable();
                dataTable = IncidentsDataSet.Tables["dataTableTest"];

                dataGridView1.DataSource = dataTable;

                //Would like to create som

Storing .EXE Files in SharePoint



   New to SharePoint.  We just started migrating directories to our SharePoint server, and have encountered an issue storing .EXE files.  The error message says that it is denied by the administrator, however our IT team believes you can not store .EXE in SharePoint and that it is a system limitation.

   Could someone please confirm whether or not there is a restriction for the storage of .EXE files in SharePoint?  

   If this is just an administrator setup issue, is there a doc that would direct us how to remore this setting?

Thank you,


ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend