Linq - Couldn't Determine Metatable Error Binding List To Datagridview
Dec 25, 2010
List<ThemeObject> themeList = (from theme in database.Themes
join image in database.DBImages on theme.imageID equals image.imageID
into resultSet
from item in resultSet
select new ThemeObject { Name = theme.Name, ImageID = item.imageID}).ToList();
dgvGridView.DataSource = themeList;
dgvGridView.DataBind();
The list object populates fine. The datagrid is setup with 2 columns. A textbox column for the "Name" which is bound to "Name" An image column which is bound to the "ImageID" field. When I execute the code I receive the following error on the DataBind() Could not determine a MetaTable. A MetaTable could not be determined for the data source '' and one could not be inferred from the request URL. Make sure that the table is mapped to the dats source, or that the data source is configured with a valid context type and table name, or that the request is part of a registered DynamicDataRoute. I'm not using any dynamicdataroutes as far as I can tell. Has anyone experienced this error before?
List<business.clspluginsprp> objprp = new List<business.clspluginsprp>(); business.clsplugins obj = new business.clsplugins(); for (Int32 i = 0; i < k.Length; i++)
I need to manually page a GridView based report, i.e. add a second page and GridView, when the height of my first GridView exceeds a limit. Is there a way I can determine the height of the GridView while data binding?
I have a situation where I need to databind a string array to a CheckBoxList. The decision if each item should be checked, or not, needs to be done by using a different string array. Here's a code sample:
string[] supportedTransports = ... ;// "sms,tcp,http,direct" string[] transports = ... ; // subset of the above, i.e. "sms,http" // bind supportedTransports to the CheckBoxList TransportsCheckBoxList.DataSource = supportedTransports; TransportsCheckBoxList.DataBind();
This binds nicely, but each item is unchecked. I need to query transports, somehow, to determine the checked status. I am wondering if there is an easy way to do this with CheckBoxList or if I have to create some kind of adapter and bind to that?
Basically, I have a gridview table with a dropdownlist column and I need a way to retrieve the selected item from it. Now I'm using an imagebutton in order to get the selected item from the dropdownlist to pop-up as a message box (as a string). I already know how to get text from a boundfield. However, using the same code to get the dropdown list item won't work. This is a snippet from my code:
I was wondering how Linq to Sql determines which tables to write to when given primary/foreign Key relationships. I can (hopefully) better explain using an example. I have the following tables:
Therefore I have a Customer Entity, a CustomerStatus entity, a CustomerType Entity and a List of CustomerAddresses. In my code, I load up the Customer Entity and the List of CustomerAddresses because that's all I need. For some reason Linq to Sql is trying to insert a new Customer Status record. I have no idea why its doing this.
Can anyone please explain to me how linq to sql determines which table(s) will be written to based on the entities above?
I am very new to ASP .net. I need to create web application with ASP .net using VB. I have created a project and create web forms with Visual Studio 2005 (ASP .net version 2.0). And it was working fine on local host. However, I got an error after I published the forms on our hosting site. The error code was as following:
Line 1: <%@ Page Language="vb" AutoEventWireup="false" CodeBehind="Login.aspx.vb" Inherits="KocaWebSite.Login" %> Line 2: Line 3: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
I have tried to find the answers on this forum as well. But I couldn't find clear answer.
My application has developed an issue that has got me baffled - i'm fairly new to MVC so please bear with me. I have an MVC web application and a Domain library, the domain has a DataModel.dbml with a single table Enquiry I have a single view called Contact with a controller HelpController, this view has a few form fields to insert the data in to the database the view has the following at the top of the file
i created a site called birthday_calendar in vwd 2008.. it runs in my local system correctly, but when i host this site, it showing error"Could not load type: birthday_calendar".. what is the wrong with this? I just copied the website files to hosting server. I dont have any bin folder in my website containing dll files.. i googled this error, results are showing that, the website should be compiled and bin folder should be in correct place.
I am new to asp.net and was trying to use datagridview in my webform. I was able to bind it to my database but I cannot make the datagridview's buttonfield respond. It seems the grid's SelectedIndexChanged event is not being fired or has issues with postback. Even a very simple statement is not being executed by the program e.g.
I've got a asp.net web application, but if i try to publish it i get this error:Error 210 Copying file objDebugPackagePackageTmpimagesaanhalingsteken1.png to bjDebugPackagePackageTmpobjDebugPackagePackageTmpimagesaanhalingsteken1.png failed. Could not find file 'objDebugPackagePackageTmpimagesaanhalingsteken1.png'. 0 0 I've deleted this image, so what to do so the project can be build well ?Is there a collection of images somewhere?
var listOfStrings = new List<string>{"Cars", "Trucks", "Boats"};
and I have a vehicles options which has a Name field.I want to find the vehicles where the name matches one of the items in the listOfStrings.I'm trying to do this with linq but can't seem to finish it at the moment.
var matchingVehicles = Vehicles.Where(v => v.Name == one of the listOfStringItem)
I have a class with all different kinds of data members, including a list of strings. When I bind the data to a GridView, I want to be able to separate out the list of strings into different columns in the GridView. These strings are more like flags, there is a max of 3 flags. The list could be empty, if no flags apply, or it could contain only one or two flags. How can I separate out these flags into different GridView columns? Do I need to do it in the OnRowDataBound event?
Current, my aspx code looks something like this. I want to be able to change the ImageUrl of the Image controls based on if the flag is raised or not.
i m binding data to Gridview using LinQ i need to sort the Gridview i have no idea how to sort cs i m using LinQ to Bind data with Gridview at Button Click.
OK So I know WHY I am having the error I am getting. I don't know HOW to fix it. Basically, if the user doesn't have a certain permission, I need to join another table. But .NET is so picky I can't just make two different queries in an IF statement and then use it outside of the if statement. I can think of some ugly work arounds for this, but I would rather not. I am fairly new to .NET I know just enough to be dangerous.
[code]....
I get the error: Unable to cast object of type
'System.Data.Linq.DataQuery1[VB$AnonymousType_111[System.Guid,System.String,System.String,System.String,System.String,System.Nullable1[System.DateTime],System.Nullable1[System.DateTime],System.Nullable1[System.Guid],System.Nullable1[System.DateTime],System.Nullable1[System.Guid],System.Nullable1[System.DateTime]]]' to type 'System.Collections.Generic.IEnumerable`1[Ten11CRMLib.Company]'.
because of this: Dim l As IEnumerable(Of Company) its not just IEnumerable of a Company, its got the source in it. I have to explicitly select source to use it in my datagrid. Can I make Dim l something that will make it stop complaining?
Could not find schema information for the element 'httpruntime'. Could not find schema information for the element 'executionTimeout'. Could not find schema information for the element 'maxRequestLength'.
According to this msdn library link this is how I'm supposed to do it,so what am I missing here?
I am trying to figure out how to bind my link results to a datasource so it can manage/update/edit/insert/delete without me having to do manual coding for all of it. Is this possible?What am I doing?I have used the LINQ to Active Directory to access our AD accounts. I need to make this a webpage frontend of basic search and managing functionality. I have it searching now and adding the results to a gridview but edit is not working now. I was looking online and I saw something about being able to bind linq results to a datasource and then using the datasource to manage all the information for me. Resources I am using:
