When I was creating a datasource for the List box - it showed the correct data,but when I tested it on the Web - I see a listbox with 3 lines of value:"System.Data.DataRowView". After manually deleting a row from the database - I see only 2 lines. After deleting all rows from the table - the listbox is empty.
So why I don't see the table values, but the string "System.Data.DataRowView"?
DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'p2_area_name'.
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.Web.HttpException: DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'p2_area_name'.
Also, I need tp populate data from database in the Area dropdown but not able to do so..
I'm trying to figure out how to find whether a column exists in a dataset, and if not, remove certain controls on the page (otherwise it will error out with: DataBinding: 'System.Data.DataRowView' does not contain a property with the name 'my column')
So...
I have a gridview that has xml data loaded dynamically by drop down list selections. The xml elements vary depending on the file.
in my web project i got an error that i couldnt find any solution. the error says: System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed. when i work in local there were no problem i put files to our server and i changed the database also. when i work in server in web application in Default.aspx i can connect db and get values without any problem using my DataLibrary
BUT the problem in my web service i also use my DataLibrary in webservice but when i try to run a method in web service it gives me the error which is : System.Security.SecurityException: Request for the permission of type 'System.Data.SqlClient.SqlClientPermission, System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.
I have a website having an aunthentication system. When I am setting my website on IIS 6 the code is absolutly working fine. But when i configure the website on IIS 7 (Windows 2008 server) it is showing me the above error. I am using a stored procedure for it
I am using System.Linq.Dynamic to create the following query at runtime:
[Code]....
I can then successfully display vMediaQ in a GridView.But I need to be able to access the individual fields (column headers and data) in vMediaQ, which is of type System.Linq.IQueryable.
I have downloaded Visual Web Developer 2010 Express and am trying to use LINQ. In order to do that I have added a LINQ to SQL class to the web site and have dragged tables from the database view into the LINQ designer, which worked fine.But..When I add: using System.Data.Linq;to MainPage.xaml.cs, I receive an error:
Error 3 The type or namespace name 'Data' does not exist in the namespace 'System' (are you missing an assembly reference?)Even although I have references to System.Core, System.Data, System.Data.Linq in the website references.
Is there a way to do the following in VB:dim sTableClass as string = <my underlying table class in linq>dim dbTab as system.data.linq.table(<typed class of sTableClass>)I've tried cycling through the table objects of the linq data context and retrieved the following: Dim ddData = pkDB.GetTable(tt.RowType.Type.UnderlyingSystemType)(where tt reflects the row of the table I want to retrieve) But the expression returns and itable and I need the table equivalent but can't get this to work with a stri
i am trying to export a table from access database to excel sheet but i am facing error saying Type 'System.Data.OleDb.OleDbCommand' is not defined.
Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim AccessConn As New System.Data.OleDb.OleDbConnection("Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:Documents and SettingsUSERDesktopD0605data.accdb") AccessConn.Open() 'New sheet in Workbook Dim AccessCommand As New System.Data.OleDb.OleDbCommand("SELECT * INTO [Excel 8.0;DATABASE=C:Documents and SettingsUSERDesktopD0605data1.xlsx;HDR=NO;].[Sheet1] from [Table1]", AccessConn) AccessCommand.ExecuteNonQuery() AccessConn.Close() End Sub End Class
I have a datatable for which i'm defining a dataadapter. I'm specifying an updatecommand with sqlparameters for the dataadapter I set the updatecommand's parameters using the following overload:
[Code]....
The length 16 is used because this is the length of the field according to sql (the image datafield is a pointer of size 16) I noticed .Net is actually truncating the string because of the length i'm setting. An image of size 3kb will properly upload if we set the length field to be greater than 3kb The question I have is what is the proper value (or strategy) to use in order to set for the length field so that ALL images will properly update to the database, with each using the appropriate size.
I guess i could theoretically set the length to be maxint, but this seems sloppy. Looking at sqlparameter documentation i didnt see an 'unlimited' or 'default' length i could set, which would allow each update statement called to use the appropriate size for the data length for that row.
I wanted to delete the record from data but I receive this error "Unable to cast object of type 'System.Data.Linq.DataQuery`1[training_eval.Course]' to type 'training_eval.Course'.
Dim eval_sure = From ev In db.Evaluates Where ev.course_id = indexcourse Select ev.course_id Dim del_course = From c In db.Courses Where c.Course_id = indexcourse db.Courses.DeleteOnSubmit(del_course) db.SubmitChanges()
I have a strange problem. I am adding a LinqDatasource object, and set the context:
[Code]....
Then I get this error:The type 'System.Data.Linq.DataContext' is defined in an assembly that is not referenced. You must add a reference to assembly 'System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'.
I have this code but dunno how to get the data from the existing sqldatasource1 into the list.
ie the code for this line: ' Get Data from Database and Fill DataReader and we will pass values to List
The sqldatasource1 returns only one field of data called holiday which is a date field.
<%@ Page Title="" Language="VB" MasterPageFile="~/00_MasterPage.master" %> <script runat="server"> Private Function GetPublicHolidays() As List(Of DateTime) Dim list As New List(Of DateTime)() ' Get Data from Database and Fill DataReader and we will pass values to List End Function </script> <asp:SqlDataSource ID="SqlDataSource1" runat="server"></asp:SqlDataSource>
I am facing the following problem when i try to add record in database. "System.Data.SqlClient.SqlException: A severe error occurred on the current command.The results, if any, should be discarded." This exception occurs occasionally, and the sql server log shows the following error whenever the above exception occurs:
Server,Unknown,A user request from the session with SPID 54 generated a fatal exception. SQL Server is terminating this session. Contact Product Support Services with the dump produced in the log directory.
