DataSource Controls :: Insert Master Detail From Text File With LINQ
Mar 2, 2010
I'm new onto LINQ and im working on a asp.net application which uploads a requisition from a preformated text file that is coming from another application.
Th format of the file its like:
HDR 001000 Description
DTL PartNumber CatalogNumber ItemDescription RequestedQty RequiredDate
DTL PartNumber CatalogNumber ItemDescription RequestedQty RequiredDate
DTL PartNumber CatalogNumber ItemDescription RequestedQty RequiredDate
I want to insert information gathered from the text file readed using streamreader with master/detail using LINQ datacontext into the database.
Heres the code of a test page to loop through the file:
[Code]....
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Jan 26, 2010
I've been experimenting with using EF (asp.net 3.5 sp1) with a master detail page. Using northwind as the database, I'm simply trying to have categories as master and products as detail. I have read everything I could find on the net about the where condition and it still fails with this error as soon as I click the select link in the master grid:
Microsoft JScript runtime error: Sys.WebForms.PageRequestManagerServerErrorException: A property with name 'CategoryID' does not exist in metadata for entity type 'WebAppEF01.Products'.
What strikes me is that the CategoryID column is not exposed by the EF model. That's been rolled up into the navigation element 'Categories' I suppose...but on the surface this seems to create the problem I've running in to. I've tried turning off the autogeneratewhere clause but didn't have success. The code for this page follows below.
[Code]....
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Jul 30, 2010
I have an "Edit" page that uses a FormView bound to an EntityDataSource. The page is called with the ID field of the record to edit in the query string: "EditEmployee.aspx?ID=10". The EDS the FormView is bound to is using: AutoGenerateWhereClause=true and a QueryStringParameter. Below the FormView I have a ListView that contains some child records of the FormView. The ListView is bound to a seperate EDS and also uses the (same) QueryStringParameter.
The problem I am having is when this ListView attempts to Insert or Edt a column I receive an error because I don't have the ID field (EmployeeID) of the parent bound anywhere in the ListView (and obviously, it is setup as a ForeignKey so it fails, like it should). Any advice on the best way to get this ID (EmployeeID) column bound in the ListView? There are many things I can do in code behind, but I would like to solve this in the markup if possible. I can move the ListView so that it is inside of the FormView if necessary.
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Apr 28, 2010
I have a text file. now I want to insert those text file's data into my database by C#.net
my text file is like:
rec alex dallas usa 25/2/1989
rec farguson la 12/8/1988
rec hopkins ny 17/9/1988
I want to insert data from name (alex, farguson...etc). I don't want to insert 'rec' keyword.
If one record is already inserted then that record will not be added again.
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Aug 6, 2010
I'm trying to setup is a News module with article listing paging and article detail paging. I have a GridView with paging that lists my articles just fine. In that list, some article titles have links that direct to an article detail page by passing in the articleID to the details page. I was able to setup my details page, which uses a DetailsView control, to use paging by using an ObjectDataSource with pageIndex and pageSize parameters from the querystring. Once on my detail page, I can use my navigation arrows to move through Next and Previous articles just fine.
No matter which article I click in my article list, my detail page always starts with pageIndex 0 and thus not the article I clicked on. I understand why that is because it's going by pageIndex value instead of articleID. What I need it to do is, set the detail to whatever articleID i pass in, then allow me to navigate Next and Previous to THAT particular article instead of starting me off from pageIndex 0.
[Code]....
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Apr 18, 2010
design pattern that works well with Visual Studio data tools against an MS SQL server; to retrieve a subset of an object's fields for all rows, and then on-demand retrieve the remainder for one row. I.E. just the small summary fields that I will serialize to a master grid view, then the larger properties including a large blob that I will render in a detail view. The performance hit from retrieving the large blob with the master result list would be too great.
The data shape is static, and I can define two separate data classes to match the specific summary vs. detail information returned. However that sounds anti-pattern-ish, to define the data classes specifically to suit the presentation layer. It also presents another problem, how to translate from the summary item to the detail item in an object-oriented way?
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Jul 15, 2010
I find my own way redundant to perform an insert command in a master-detail transaction. Sample, is a Purchase Order, before inserting the details/items will need to find the master key otherwise were not able to make the details connection. Normally we send command to button object which will submit the whole page rather than part of it and these means were not able to capture beforehand the master key to refer in the details.
So, Im thinking of how you do efficiently a master/detail batch update like we normally do in windows apps.
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Apr 22, 2010
I need to create a Master Detail detail form to insert data into Access. The form i have to create is very similar to the typical Order/Detail form.
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Feb 6, 2011
article on binding to a list and I've got that working fine on one view. But what I'm stuck when doing it off a master record. Everything seems to work except that when I look in the database the detail records previous associated with the current master have their Foriegn key to master set to Null and a new set of detail records have been inserted. I've got a really simple form for this object
[Code]....
The form collection comes back with the expected prefixes:
[Code]....
And the Controller.UpdateModel(master) binds all the properties correctly. But when I call dbContext.SaveChanges it issues the follow sql from sql profiler (psuedo code)
[Code]....
I've got a work around that works but it's pretty hackish and I'm currently not matching up the keys so it's dependent on everything coming back in the right order. Plus I've got to include all the fields that I want updated.
[Code]....
I thought that entity framework's code first was the culprite but I've unit test that and it works fine. I've got a feeling that UpdateModel is somehow removing and re-adding the children. Has anyone else got this to work? Of course, I could throw in the towel and parse the indexed field names myself, but I'm so close!
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Apr 28, 2010
I am trying to do an update and if no selection has been made in a dropdownlist (integer) or date field I would like to insert a dbnull value. But I am new to Linq to Sql and wonder if this is possible and if so how to process. I have the following code but the DBNull.Value is giving me an error.
Dim context As New SondageDataContext()
Dim repondant = (From r In context.Repondants Where r.RefRepondant = iRefRepondant Select r).Single
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repondant.Nom = strNom
'dates
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else
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End If
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If iOccupation <> -1 Then
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End If
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May 25, 2010
I use the following code to insert recode to a sql 2008 table, the field ID of DBProgram is IDENTITY, so SQL 2008 SERVER will pass a value to it automatically. How can I get the ID value of the record I just insert ?
DBProgram dbProgram = new DBProgram();
db.DBPrograms.InsertOnSubmit(dbProgram);
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Jun 7, 2010
I tried to find a LINQ section on this forum, but couldn't, so I'll post this here since is deals with LINQ, C#, MVC, SQL Server, and well...just about everything.
Here's the details....My Application is an ASP .Net MVC 1.0 app, using C# 3.5, SQL Server 2005 Std, and LINQ to Entity.
In my View, I have numerous Html.CheckBox controls, they get passed to my Controller as a string collection via a JQuery Ajax call. The values of each checkbox are seperated by a comma(,). I then Split the string, to get the individual values. The overall purpose to to allow users to build a custom report with only the data elements they have checked the boxes for. Here is my controller:
[Code]....
The part that I am having a problem with is that I only want to Insert the data elements into my DB table for the ones that the user has selected the checkbox for. So, for example, I'd like to do something like this:
[Code]....
I don't know if there is a LINQ switch statement in which I can access outside variables and the columns of the table, or any thing like that.
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Apr 29, 2010
I am using LINQ Expression to insert records in SQL Table. My Table dosen's have any Primary Key Field. Whenever I Am trying to Insert Records in Table using LINQ Expression, this always occurs an Error that 'the Table You are using to insert Dosen't Have Any Primary Key Field.
How I Will Insert Records Without Having Primary Key ?
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Jul 27, 2010
I have a Page with a FileUpload control on the top with the "Insert" button, in order to insert pictures Below that, i have a Listview showing all the pics. THis is the way i am placing my Update Panel:
[Code]....
How can i, press the INSERT button and reloads only the Content Template after INSERTING?
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Jul 27, 2010
I have the basic Master / Detail Views working great with the default ASP.NET MVC Route; however I would like to build some URLs like this: /Class/Details/5 -- General Detail view [Working] What I'm not sure about (and I'm not tied to this URL format, just something roughly equalivent.)
/Class/5/Details/Logs -- Detail View with Logs
/Class/5/Details/Status -- Detail View with current Status
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Mar 4, 2010
I want to be able to insert any kind of text into a sql 2005 database. The column im using to store this is ofVARCHAR(MAX) type . Basically , even if the text contains special charectars or unicode content or html tags I should still be able to insert it into the database without any errors. Please guide me on how to achieve this.Things I tried that did not work !- changed the column to type NVARCHAR(MAX)-Tried Server.HTMLencode for the column that accepts the textIs regex a solution for this problem. If so how can i implement it?
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Apr 19, 2010
I have one table with three columns, one of them datatype is nvarchar and I want to insert text in this columns in diferents lagauge.
Lets assume Hindi langauge. I know I can insert text in hindi laguage by using N prefix.
for example. Insert into myTable(column1) value('इमरान खान').
But I dont know how to use this N prefix in stored procedure.
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Mar 18, 2010
I am trying to use the TableApapterManager.UpdateAll to insert values to master and child table. I had set the relation to cascade for update in the dataset and the HierarchicalUpdate to true. But stil when I run TableApapterManager.UpdateAll(dataset), I get a foriegn key violation error. Following is the code I used:
int ID;
DAL.Datasets.dsMembers.MembersRow rwMem = m_dsMembers.Members.NewMembersRow();
rwMem.u_name = mem.Name;
m_dsMembers.Members.AddMembersRow(rwMem);
DAL.Datasets.dsMembers.MemPhonesRow rwmemphn = null;
rwmemphn = m_dsMembers.MemPhones.NewMemPhonesRow();
rwmemphn.u_memberid = ID;
rwmemphn.u_phn = "test";
m_dsMembers.MemPhones.AddMemPhonesRow(rwmemphn);
m_adpMgr.UpdateAll(m_dsMembers);
return ID;
The error I get is "The INSERT statement conflicted with the FOREIGN KEY constraint "FK_MemPhones_Members". The conflict occurred in database "Family", table "dbo.Members", column 'i_memeberid'.
The statement has been terminated."
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Apr 7, 2010
I am using a GridView and a DetailsView to establish a master to detail form, the idea is to let user select a record on Gridview and Detailsview will load selected record for editing. Here is declaration for the ODS and Detailsview.
[Code]....
this is working fine when I select a record from GridView and edit/update it in DetailsView. But it's not working so well when I insert a new record using DetailsView, because after insertion the selected record remains as the record selected in GridView.
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Aug 11, 2010
So here is the situation - there is data on master records - its a hierarhical view - something like (ID, IDParent, Title) and detail data - (ID, IDMaster, Details)
And like to build UI using an TreeView - binded with master data - and an GridView - binded with detail data.
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Mar 14, 2010
I have a gridview that displays some records....i have added a new column to it called Edit....now when i click the edit link it should take me to a new page where i can edit that particular record only.....how do i go about it? I am using forms and no inbuilt ASP.NET controls except gridview....so i need to write queries for the same.....plz post code if possible
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Jul 2, 2010
I am using a Datalist and a Listview in a Master/Detail relationship. Each time a DataList item is bound, a Listview is loaded dynamically. I have provided the relevant Layout and Item templates. It is worked fine for one item. But for more than one item, it will raise the following error: "An item placeholder must be specified on ListView 'ItemListView'. Specify an item placeholder by setting a control's ID property to "MyLayout$itemPlaceholder". The item placeholder control must also specify runat="server".
Despite having set up the item placeholder.
Here is the code-behind:
protected void NodeDataList_ItemDataBound(object sender, DataListItemEventArgs e)
{
if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem)[code].....
The Layout template:<asp:PlaceHolder ID="itemPlaceholder" runat="server"></asp:PlaceHolder>
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Nov 14, 2010
I made my own master-detail pages using a listview. Rather than url, I use a listview event to set a session variable and response.redirect to the detail page, which on Page Load, loads the data from the database using the session variable, where it can then be edited. The details page is basically just text boxes and dropdownlists, but I used some third party controls and it all looks really sharp.
Here is the corner I pained myself into. Several dependent dropdowns on the master page filter the main listview. If I go back to the master page using response.redirect, the user would have to use the dropdowns again just to get back to where they were before they went to the details page. This is just not going to work.
To further complicate things, I wanted the master page to have paging on it. So if a back button reloads the page, they would have to set the dropdowns again, and page through the data again if needed. Egads.
The closest I have come to working is using a javascript back back button, but this fails after some postbacks on the details page (that are needed). And of course, the master page isn't refreshed when you go back to it (but I could probably live with that).
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May 22, 2010
when need to insert into Text.boxes details from user (name,e-mail, e.tc.) and to get record of it into DB on other page. I try to get after pressing Submit btn:
DataSource.InsertCommandType=SQLDataSourceCommandType.StoredProcedire
DataSource.InsertCommand="CustomerInsert" ....,
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Mar 31, 2010
I want to insert username and password into two tables (say table1 as well as table 2) using stored procedure.
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