C# - How To Access ForeignKey Values In GridView Using LinqDataSource
Feb 8, 2011
I have three tables in database:
ARTICLE with fields like ID_Article, Title, etc. and also a FK ID_Author
CATEGORY with fields ID_Category, Name
CATEGORYTOARTICLE with fields ID_Article, ID_Category
Now I have a page that shows all Articles of a given Category. Inside there is a GridView.
[Code]....
The ID of the viewed Category is passed via QueryString.
How to access the fields of Article table so that I can create columns for them in GridView? I tried using Eval("Article.Title") but it keeps saying that "DataBinding: 'konserwatyzm.db.CategoryToArticle' does not contain a property with the name 'Article'."
I have a Access DB. I have relations with two tables. For example In my table1 I have three columns as T1ID, Name, Description and Tbale2 I have three column as T2ID, T1ID which is a foreignkey from Table1 and desc.
What I want is that : for example, I wanna copy the columns from table2 which has the value of 2 under the foreignkey field and I wanna insert them into table2 again with the value of 3 under the foreignkey field !
I am writing an ASP.Net web application. I have listview, it's datasource is a LinqDataSource. In my database, I have a staff table and I am trying filter for records by their team using a dropdownlist. This works fine, until I select "All" in the dropdownlist. It returns all staff except for the ones where the teamID is null. How can I return the records where teamID is null?
I have uploaded a excelsheet to datatable and that datatable is bound to gridview.there is a save button present,i want to click the save button and all the gridview data will save in database.but that gridview has no boundfield or templatefield.
In my asp page when press a button, a gridview will be populated with data from db, but beside the columns from database i need a new dynamic column in gridview, to contain only dropdownlist with items number from 0-n.
This far i managed to do it, with some research on internet (i used an intemerdiet datatable to apply ItemTemplate from GridViewTemplate class, and than merged it to datatable containg the result from query, so the gridview's datasource si the merge of this 2 datatables).
The issue is that i don't now how can i access the values selected by user in the dinamically dropdownlists, 'cause i have to save them in DB.
Attach is my GridViewTemplate class code, and .cs and .aspx code.
I have a LinqDataSource and a GridView displaying a table. Columns of type xml don't show up. I'd like them to show up something like they do in Sql Server query outputs, with a link to display the clickable xml, though there may be another approach i'm not considering (maybe a styled display of the xml data, etc.). Two things i'd like to know how to do
First, get the xml converted to a string, and display it in the table. Maybe the first 30 chars. Finally, style the xml into something useful, like a clickable link to display the full xml, or a sub-table, or a styled string.
So the following works, and displays a nice table, with edit and delete links. But Xml fields are missing. How would you go about adding support for the Xml fields?
I've a gridview bound to linqdatasource1 and a details bound to linqdatasource2 (for searching).
When I update the data on detailsview, my gridview is not updating. I've tried handling various gridview events and databinding the gridview in code but it doesn't seem to work.
i have a grdidview control on the .aspx page and i am trying to connect dynamically from code behind and bind the gridview but somehow it throwing me an error... what is wrong with this code?
LinqDataSource LDS_POReport = new LinqDataSource(); LDS_POReport.ContextTypeName = "DataContextDataContext"; LDS_POReport.Selecting += new EventHandler<LinqDataSourceSelectEventArgs>(LinqDataSourcePO_Selecting); this.gvReport.DataSource = "LDS_POReport"; //this.gvReport.DataBind();
Update:
after i update the code to this.gvReport.DataSource = LDS_POReport;
it works fine but when i try to sort i get this error:
The GridView 'gvReport' fired event Sorting which wasn't handled.
the problem is not solved the way i wanted but i go ahead give the credit to : ŁukaszW.pl for his time and effort.
i am using gridview control and a linqdatasource and its all working fine and i have added the functionlity of searchingBySubject and i added WhereParameters and than binding my gridview (see the code below) but somehow its not returning any rows and i see i have number of rows based on what i am searching.
Orders OrderProducts - An order can have 1 to many orderProducts records associated with it.
What I am trying to do (unsuccessfully) is to implement a GridView search using a LinqDataSource wherein the search returns Order results where any of the OrderProduct.Manufacturer columns contain a search query. I was hoping the following would work, however it seems lambda expressions do not work within a Where clause of a LinqDataSource (in VB):
No property or field 'op' exists in type 'orderProduct' Any clues as to how to get this working within the LinqDataSource definition, or will I have to handle and set up a custom OnSelecting event?
Im using a LINQDataSource to populate a GridView of Universities.
Each University has an associated State, which is in another table and associated by a foreign key (StateID).
I have a TemplateField in the GridView so that when you view it normally it displays the StateName which comes from the State table and when you edit it shows a DDL populated with everything from the State table.
[Code]....
If I debug, inside of RowUpdating, GridViewUpdateEventArgs.NewValues doesnt even have a key for State.
Question: How do I let my gridview know I want it to update this column? All the BoundFields just seem to work...
I have a column that I don't want to display but I still want to access its value. the other problem is that I can't access the value of a cell because it contains a label. Does someone know how to access the text in that label?
The datasource of the datagrid is a LINQDataSource which relies on the value of a dropdownlist. In addition, I want to use the footer to insert new records - so I'd prefer not to use the empty dataset template. I am trying to find a way to always display the footer regardless if the datasource is empty or not.
EDIT: Is there a way to create an empty/invisible object of the type in the LinqDataSource?
i am using gridview control and a linqdatasource and its all working fine and i have added the functionlity of searchingBySubject and i added WhereParameters and than binding my gridview (see the code below) but somehow its not returning any rows and i see i have number of rows based on what i am searching.
I have a SQL database. I am getting a datatable from SQL. In SQL Query the table is having null values in the output. But when it is coming to the front end, the null values are replaced by empty values.
So in the front end in the datatable i am having empty values in some cells. I am trying to insert this datatable into access. For this i am using following code...
OleAdpData.InsertCommand.Connection = OleConn; // OleConn is the OleDbConnection OleAdpData.InsertCommand.Connection.Open(); OleAdpData.Update(dtData); // dtData is the datatable OleAdpData.InsertCommand.Connection.Close();
It is inserting the datatable to access database. But it is inserting the empty spaces as present in the datatable. I want to insert NULL into the cells in access datatable where the cells are empty. Where should i add my logic for this.
I am getting int values from the stored procedure. But when i bind this datasource with the gridview i am seeing the values being converted into float. i am using Text='<% # Bind("Quantity") %' I wanna that to be displayed as int, with out zero'seg: let the value be 233, when i bind that its getting displayed as 233.00
I have problem while I'm inserting some values to access database ,my query contains From as fieldname this is the query: Insert into Bank (TrancheDBID,TxnType,CACN,MatchCACN,PlanAssignDate,AssignDate,ActiveDate,From,To) values (809,'Assigned','','0156-02-01','15/05/2001 12:00:00 AM','30/11/2009 12:00:00 AM','7/10/2001 12:00:00 AM','HIL','KAH')
I have tried to put [From] but it doesnt work in vb.net, however it does directly on access
i am using a gridview in my web page,i used to bind the database records to the gridview..my columns are name,empid,company name,pl leave,sl leave,total leave taken here total leave taken is not a database fields,in the page i want to fill the records once loaded pl leave and sl leave is added and display in the total leave taken column..it working properly when all pl ans sl columns fill with numbers,if some pl and sl leave having blank values.it showing an error like input sting was not in correct format..this is my code
