.NET Tutorials, Forums, Interview Questions And Answers
Welcome :Guest
Sign In
Register
 
Win Surprise Gifts!!!
Congratulations!!!


Post New Web Links

LINQ how to get data from dropdownlist in label1

Posted By:      Posted Date: October 07, 2010    Points: 0   Category :ASP.Net
 

            var dnevnice = from p in db.tbl_dnevnices
                         select p.Drzava;

            ddlDnevnice.DataSource = dnevnice;
            ddlDnevnice.DataBind();

I have label1.text.

Example: ID


How to display data according to the selected data in DropDownList?




View Complete Post


More Related Resource Links

Help: populate Html.DropDownList from table data? [Linq to SQL model]

  

I have two tables, Users and Roles.  The roles table is a reference table for the different roles of my site (RoleId and RoleName columns). The Users table contains profile data for each user, including a RoleId column that is FK'd back to the Roles table [RoleId].

Both tables are in a Linq to SQL model.

I have an edit page created which lists all the profile values of a user.  The edit page inherits the User model.  One of the editable values is the RoleId field.  I want to set this up to be a drop-down list that contains items labeled using the RoleName column of the Roles table, and matched with values of RoleId.

How can I achieve this?


How to get two data in dropdownlist with Linq

  

var customers = from c in db.tbl_relacije_sifrants
                        select new
                        {
                            c.ID,
                            c.Relacija,
                            c.IdSifra
                        };

        ddlRelacijeSifrant.DataSource = customers;
        ddlRelacijeSifrant.DataTextField = "Relacija";
        ddlRelacijeSifrant.DataValueField = "ID";
        ddlRelacijeSifrant.DataBind();

I need Two Pieces of data and the DropDownList.

Relationship + SifraId = DropDownList

What do I do?

Regards


Linq - add data to database then email user the details

  

Hi all

I'm not sure how to structure the code for this but what I want to do is be able to add data to a database, and once this has completed successfully, then email the user to say the details have been added successfully to the database.

I need to:

1. Check that the relevant data has been added into the database then

2. Email the details of the relevant data when completed. 

 

Thanks in advance for your help,

Laura

 

 


The type 'System.Data.Linq.DataContext' is defined in an assembly that is not referenced. You must

  

Hi,

This is frustrating, and I don't know how to solve it.

I have a strange problem. I am adding a LinqDatasource object, and set the context:

        protected void LinqDataSource_ContextCreating(object sender, LinqDataSourceContextEventArgs e)
        {
            e.ObjectInstance = new KaruselaDataContext(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
        }


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'.

 

On web.config I already have this:
<add assembly="System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"/>

NOTE: The datacontext is in a different project (DLL proect) where I added a refernce to System.Data.Linq.

is there another way adding a refernce to a web project? or only though teh web.config?

Thanks.


Data Points: LINQ Projection Queries and Alternatives in WCF Services

  

LINQ's ability to project randomly shaped data into anonymous types can be a blessing and a source of frustration, says Julie Lerman. It's great when you just need to grab a special view of your data, but it can be problematic in certain circumstances. She explains what the limitations are and how to get around them.

Julie Lerman

MSDN Magazine May 2010


Data Points: Precompiling LINQ Queries

  

Did you know that by precompiling LINQ queries you might actually be degrading your app's performance if you're not careful? Julie Lerman explains how to ensure you're not re-precompiling queries each time and losing the expected performance benefits across post-backs, short-lived service operations and other code where critical instances are going out of scope.

Julie Lerman

MSDN Magazine March 2010


SOA Data Access: Flexible Data Access With LINQ To SQL And The Entity Framework

  

Building a data access layer using LINQ to SQL and the ADO.NET Entity Framework allows you to decouple your application from the persistence technology you're using.

Anthony Sneed

MSDN Magazine December 2008


Data Points: Standard Query Operators with LINQ

  

LINQ to Objects and LINQ to Entities have an arsenal of Standard Query Operators that operate on sequences to perform a wide variety of operations.

John Papa

MSDN Magazine March 2008


Linq getting data from field on record

  

Hello,

   I would assume this is possiable but I cannot seem to find it anywhere. I just one the contents of a single field, I don't see why I have to return the how

record to get get that information, here is my current code, how can I make this better without returning the entire record, for just getting contents of one field.


var patternrecord = storedb.Patterns_Table.Single(a => a.Pattern_GUID == id);
PMEDIA.Pattern_Key = patternrecord.Pattern_Key;


Data Binding to Dropdownlist

  

   private void AddDBDataToControl(DataSet app_Support,int count)
    {
        int i = 0;
        while (count != 0)
        {
     

            DateTime dt = Convert.ToDateTime(app_Support.Tables[0].Rows[i]["FromDate"].ToString());

//dt=23/08/2010 10:04:00 AM

            DropDownList h1 = (DropDownList)GVDate.Rows[i].Cells[1].FindControl("txthour");
            h1.SelectedValue = dt.Hour.ToString();
            DropDownList m1 = (DropDownList)GVDate.Rows[i].Cells[2].FindControl("txtmin");
            m1.SelectedValue = dt.Minute.ToString();

            DropDownList h2 = (DropDownList)GVDate.Rows[i].Cells[5].FindControl("txthourto");
            DateTime dt2 = Convert.ToDateTime(app_Support.Tables[0].Rows[i]["To

Linq join fields for return data

  

Hello,
  how would I join fields together?

           return (from c in storedb.Product_Categories

                         where c.Category_Name.Contains(searchText)
                         orderby c.Category_Name
                         select new {
                                    c.Cat_GUID,
                                    c.Category_Key && " ;" && c.Category_Name // HOW CAN I DO THIS.....
                          

Quick Note: Create Silverlight Graphs with SharePoint 2010 Data by Using LINQ

  
In this exercise, you will learn how to create Silverlight applications to retrieve SharePoint 2010 list data using LINQ.

Quick Note: Accessing Data in a SharePoint 2010 Web Part by using LINQ

  
In this exercise, you develop and deploy a visual Web Part that reads data from two lists by using a LINQ query and displays it in a DataGrid control.

Problem while retrieving data from a lookup column from sharepoint linq.

  
Hi I am working with sharepoint linq concept. When I am giving a query with lookup column It's working fine.  But when i am trying to retrieve the data from a look up column to spgridview. I was unable to get the output. Here is the above code which i have worked.   string strTitle = string.Empty; string strStatus=string.Empty; var context = new LinqSampleDataContext(SPContext.Current.Web.Url); EntityList<SharePoint2010ConceptsItem> Concept = context.GetList<SharePoint2010ConceptsItem>("SharePoint 2010 Concepts"); var query = from cs in Concept where cs.Status.Title.ToString()!="Completed" select new { cs.Title, cs.Id, //cs.Status }; sgvConcepts.DataSource =query; sgvConcepts.DataBind();   Any help me plz how to retrieve the data from a lockup column.bvnprasad

Problem with Retrieving data from lookup column using SharePoint 2010 Linq Concept

  
Hi I am working with sharepoint linq concept. When I am giving a query with lookup column It's working fine.  But when i am trying to retrieve the data from a look up column to spgridview. I was unable to get the output. Here is the above code which i have worked.   string strTitle = string.Empty; string strStatus=string.Empty; var context = new LinqSampleDataContext(SPContext.Current.Web.Url); EntityList<SharePoint2010ConceptsItem> Concept = context.GetList<SharePoint2010ConceptsItem>("SharePoint 2010 Concepts"); var query = from cs in Concept where cs.Status.Title.ToString()!="Completed" select new { cs.Title, cs.Id, //cs.Status }; sgvConcepts.DataSource =query; sgvConcepts.DataBind();   Any help me plz how to retrieve the data from a lockup column.bvnprasad

A general validation attribute for checking uniqueness in a linq to sql data context

  
I've been programming asp.net for, oh, a couple of days now. Here's a question I can't even begin to figure out for myself. I hope it's obvious from the code what I want to accomplish, and I have, but it's not pretty. Furthermore I'd like to use it on whatever table, whatever field, i.e. check the uniqueness of a value against a table and field I specify, passing it all into the attribute constructor. public class UniqueEmailAttribute : ValidationAttribute{    public UniqueEmailAttribute()    {    }    public override Boolean IsValid(Object value)    {        //not pretty. todo: do away with this.        var db = new CoinDataContext();        int c = db.Emails.Count(e => e.Email1 == value.ToString());        return (Boolean) (c == 0);    }}

Cascading DropDownList with LINQ

  
My application includes a gridview control with and Edit mode which allows users to do selections using cascading dropdownlist. My code is based on tutorial by Brian Orrell (link below). I am able to statically populate the dropdownlist but in my case I need to populate it dynamically based on a previous selection of a dropdownlist, I would like to do it programatically so I can manipulate data. I Could not find any code samples which show how to do it progamatically if anybody knows of a site with such example please post a link   http://borrell.parivedasolutions.com/2008/01/objectdatasource-linq-paging-sorting.html
Categories: 
ASP.NetWindows Application  .NET Framework  C#  VB.Net  ADO.Net  
Sql Server  SharePoint  Silverlight  Others  All   

Hall of Fame    Twitter   Terms of Service    Privacy Policy    Contact Us    Archives   Tell A Friend