EntityDataSource Using IN Clause On Navigation Property Collection?
Feb 28, 2011
I'm using EntityDataSource to retrieve my items, and i want to get the items for a particular region. (items and regions has a many to many relationship, thus item has a regions navigation property). and I'm using "IN" to filter the items. tried several combinations and it kept on throwing various errors. how can i get this sorted out:
Below is My DataSource:
[code]....
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Sep 28, 2010
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Nov 30, 2010
is it possible to use OFTYPE in where clause of an entitydatasource? I mean something like this:
srcUsers.Where = "OFTYPE(Doctor)";
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Nov 22, 2010
I am using EF 4 and EntityDataSource in a Page (WebForms).
This page contains a DropDownList that display UserName.
Data from this DropDownList it is from "aspnet_Users".
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<asp:EntityDataSource ID="EntityDataSourceListUsers" runat="server" ConnectionString="name=CmsConnectionStringEntityDataModel"
DefaultContainerName="CmsConnectionStringEntityDataModel" EnableFlattening="False"
EntitySetName="aspnet_Users" Select="it.[UserId], it.[UserName]">
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Feb 28, 2010
I have a GridView that's currently bound to an ObjectDataSource. I would like to see if it's possible to instead bind it to an EntityDataSource. However, I need to be able to apply custom filters to it.
One of the filters corresponds to a bit / boolean property in the database / EntityDataModel. It has 3 possible selections:
[Code]....
[code]....
How can I accomplish the same thing in an eSQL Where clause? There is no COALESCE function, is there an equivalent?
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Apr 4, 2011
I have an EntityDataSource I've mapped to the entity Resident which includes two navigation properties (Building1, Room1). I've set my GridView to use this EntityDataSource and set the EntityDataSource Include property to Building1, Room1 so it includes these navigation properties and have added these columns to the GridView. When I run the application instead of displaying the associated navigation property it shows this: webHousingAdmin.BuildingHow can I get it to display the actual value? Code looks like this for GridView:
<asp:TemplateField>
<ItemTemplate>
<asp:Label ID="lbl1" runat="server" Text='<%# Bind("Building1") %>' />
</ItemTemplate>
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<asp:TemplateField HeaderText="Building">
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</ItemTemplate>
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But is there a simpler way to do this? This only displays the text, doesn't let me edit it...if I can do it as a boundfield that would be ideal.
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Sep 28, 2010
i have a problem that only shows if EntityDataSource present on aspx pages ,interesting thing it's just occures when i'm refreshing the page (F5) or viewing it again and it's driving me crazy it's seems to be a bug with entity framework because i tried it with another project and i just get the same error:
Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information. 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.Reflection.ReflectionTypeLoadException: Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information.
[Code]....
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Jun 9, 2010
I have an EntityDataSource where I'm trying to replace some previous code-behind work. My EntityDataSource looks like:
<asp:EntityDataSource
runat="server"
ID="personDataSource"
ContextTypeName="Model.GuidesEntities"
EntitySetName="CharacterFavorites"
OrderBy="it.Person.FullName"
Select="it.Person.Id"
Where="it.UserName = @userName" />
When when I actually use it I get the error:
'Person' is not a member of type 'Transient.rowtype[(Id,Edm.Int32(Nullable=True,DefaultValue=))]' in the currently loaded schemas.
Does the EntityDataSource not support walking the relationships? How would you do this with the EntityDataSource?
Also the @userName parameter is being added in the code behind for now. Extra points for anyone who knows how to specify a username parameter directly in the WhereParameters collection.
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Jan 30, 2011
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how can i set the DataTextField to a property of a navigation property, something like:
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Feb 2, 2011
I use EF 4 and C #.
I need populate a Pure Junction Table (containing only FK to other tables) when an EntityDataSource _Inserted event is raised.
I have 3 Tables in my Database:
[code]....
Here a useful resource:
But I am not able to implment it:
[code]....
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Mar 4, 2010
I have two Entity classes: Order and OrderItem. Order contains a navigation property OrderItemSet of type
System.Data.Objects.DataClasses.EntityCollection<OrderItem>
On an aspx page is a FormView bound to this EntityDataSource:
[code]....
When I run the application I get an exception pointing to the line DataSource='<%# Eval("OrderItemSet")%>' in markup and telling me:
DataBinding: System.Web.UI.WebControls.EntityDataSourceWrapper does not contain a property with name 'OrderItemSet'
What is wrong here?
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Jul 15, 2010
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Mar 2, 2011
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foreach (DataGridViewRow item in dataGridView1.Rows)
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{
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oclass.property = item.Cells[col.Name].Value.ToString();
Collection.add(oclass);**
}
}
}
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foreach (DataGridViewColumn col in dataGridView1.Columns)
{
**class oclass=new class();
oclass.col.Name= item.Cells[col.Name].Value.ToString();
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Apr 22, 2010
I have a question, much liket this unanswered one. I'm trying to work with the entity framework, and having a tough time getting my foreign tables to update. I have something basically like this in the DB:
Incident (table):
-ID
-other fields
Responses (table):
-FK:Incident.ID
-other fields
And and entities that match:
Incident (entity)
-ID
-Other fields
-Responses (EntityCollection of Responses via navigation property)
Each Incident can have 0 or more responses.
In my Webpage, I have a form to allow the user to enter all the details of an Incident, including a list of responses. I can add everything to the database when a new Incident is created, however I'm having difficulty with editing the Incident.
When the page loads for edit, I populate the form and then store the responses in the viewstate. When the user changes the list of responses (adds one, deletes one or edits one). I store this back into the viewstate. Then when the user clicks the save button, I'd like to save the changes to the Incident and the Responses back to the DB. I cannot figure out how to get the responses from the detached viewstate into the Incident object so that they can be updated together.
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Clearning the Incident.Responses collection and adding the ones from the viewstate back in:
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for each objResponse in Viewstate("Responses")
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next
Creating an EntityCollection from my list and then assiging that to the Incident.Responses
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Iterating through the responses in Incident.Response and assigning the corresponding object from viewstate:
for each ObjResponse in Incident.Responses
objResponse = objCorrespondingModifedResonseFromViewState
Next
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<MyStringCollectionProperty>
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[code]...
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Dec 14, 2010
[code]....
Above is my select query result. "Select Groupname from table". Now i want to add dynamit row in table which display like follows.
[code]....
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"Items collection cannot be modified when the DataSource property is set."
so I am trying to add dynamically into table.
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Feb 17, 2010
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lbMembers2.Items. Add(lbMembers1. Text);
lbMembers1.Items. Remove(lbMembers 1.Text);
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This is what I've done with CompositeControl:
[Code]....
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[Code]....
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