Fix to "Object must implement IConvertible" error when using objectdatasource withy multivalue parameter under Telerik Reports

If you want to pass multivalue parameters to an objectdatasource you have to make sure the argument type of the objectdatasource's method is object array. You cannot pass a List or array integer or etc.
In the method body convert the object [] to the needed array type  . You can do it this way:
parameter is:

(object[] eventTypes)
   
            int[] eventTypeIDs = eventTypes.Select( Convert.ToInt32).ToArray();

Telerik Report doesnt see referenced classes/methods

I have static classes which has the DAL methods which I want to use in my Telerik Report
To do that I drag an objectDataSource to my report and none of those classes I referenced show up in Configure Object Data Source wizard.
Here is a quick solution:
Just add a public struct like  this to each one of your static class , recompile DAL and Telerik now will see your methods

        public struct  ShowMyClass{};

Commit failed (details follow): Cannot commit 'D:\Users\Admin\AddUpdateContact.aspx.cs' because it was moved to 'D:\Users\Admin\AddContact.cs' which is not part of the commit; both sides of the move must be committed together

I recently started to getting this exception from SVN on my Windows
Commit failed (details follow):
Cannot commit 'D:\Users\Admin\AddUpdateContact.aspx.cs'
 because it was moved to 'D:\Users\Admin\AddContact.cs'
 which is not part of the commit; both sides of the move must be committed
 together

First solution:

Try to commit both folders together, the folder of  : 'D:\Users\Admin\AddUpdateContact.aspx.cs' and the folder of 'D:\Users\Admin\AddContact.cs' and if that doesnt work:

Select the new location(AddContact.cs) when committing and add the old one (AddUpdateContact.aspx.cs) to ignore list

RadGrid download attachment doesnt work inside Ajax panel

If your download button inside the RadGrid doesnt work if in an ajax panel:

 All you have to do is below( "btnDownload" is the id of the control
 which causes the download):

       function RequestStart(sender, args) {
            if (args.get_eventTarget().indexOf("btnDownload") >= 0) {
                args.set_enableAjax(false);
            }
        }

<telerik:RadAjaxPanel runat="server" LoadingPanelID="pnlLoading" 
ID="pnlMain" ClientEvents-OnRequestStart="RequestStart">
 

  <telerik:GridTemplateColumn HeaderText="Business Card" >
      <ItemTemplate>
    <asp:LinkButton runat="server" ID="btnDownload" Text="Download" 
CommandName="Download" CommandArgument='<%#Eval("ID") %>'    >
    </asp:LinkButton>
       </ItemTemplate>
 </telerik:GridTemplateColumn>

Radajaxpanel and RegisterStartupScript

If you want call javascript from server side while using RadAjaxPanel use 
ResponseScripts.Add method. 

//Doesnt work  :
   ScriptManager.RegisterStartupScript(this, GetType(), "RefreshDD", 
"RefreshDD();", true); 

//Works :
   pnlMain.ResponseScripts.Add("RefreshDD();"); 

Fix to RequiredFieldValidator taking too much space

Set this property : Display="Dynamic" and it wont create extra <br>

Use Eval to run javascript method inside item template of radgrid

This works :
                <telerik:GridTemplateColumn HeaderText="Edit">
                        <ItemTemplate>
                            <asp:Button runat="server" Text="Edit" AutoPostBack="False"
 OnClientClick='<%# String.Format("openAddContact({0})",Eval("ID"))%> '></asp:Button>

                        </ItemTemplate>
                    </telerik:GridTemplateColumn>

This doesn't:
                <telerik:GridTemplateColumn HeaderText="Edit">
                        <ItemTemplate>                        
     <telerik:RadButton ID="Button1" runat="server" Text="Edit" 

 AutoPostBack="False" 

 OnClientClicked='<%# String.Format("openAddContact({0})",Eval("ID"))%> '>
            </telerik:RadButton>
                        </ItemTemplate>
                    </telerik:GridTemplateColumn>

intersting hah 

Fix to RadNumericTextBox declarative binding error "Specified cast is not valid"

 <telerik:GridTemplateColumn HeaderText="No of  Subscribers">
          <ItemTemplate>
               <%#Eval("SentToCount") %>
          </ItemTemplate>
          <EditItemTemplate>
              <telerik:RadNumericTextBox ID="rnSentCount" runat="server" MaxValue="1000000"
CausesValidation="True"   NumberFormat-DecimalDigits="0" DataType="Int32"  MinValue="1" 
DbValue='<%#Bind("SentToCount") %>'/>
          </EditItemTemplate>
          <InsertItemTemplate>
              <telerik:RadNumericTextBox ID="rnSentCount" runat="server" MaxValue="1000000"
CausesValidation="True" NumberFormat-DecimalDigits="0" DataType="Int32"  MinValue="1"
DbValue='<%#Bind("SentToCount") %>'/>
           </InsertItemTemplate>
 </telerik:GridTemplateColumn>

  <%#Bind ()%> will not work with Value property so use DbValue instead and it will
 work like a charm. Why intellisense doesnt display DbValue : good question ... to telerik :) 

RadioButtonList bind inside GridView

  <asp:RadioButtonList ID="rblSentTo" runat="server"  

SelectedValue='<%#Bind("SentTo") %>'>
                                <Items>
       <asp:ListItem Text="Community Members" Value="C"></asp:ListItem>
       <asp:ListItem Text="Parents/Students" Value="P"></asp:ListItem>
       <asp:ListItem Text="" Value=""></asp:ListItem> 
                                </Items>
                            </asp:RadioButtonList>

Here the SentTo is nullable , in case your field is not , you do not need the 3rd ListItem with "" value but if it's nullable, you must add it, otherwise it cant find a match to null value and give an error

SEO friendly data display in ASP.NET

 Google seems to be not indexing javascript links
So if you are using a paged GridView of asp.net, google may (or may be not, but in my case it didnt)  index only the original page not the links below it.


DataPager control helps you there to create SEO friendly data display

I also found a free user control for the same purpose:

http://asp-net-elephant.blogspot.com/2011/06/custom-seo-friendly-paging-with-aspnet.html

Thanks

Using empty value in a databound GridDropDownColumn

 In RadGrid if you want to use dropdown box (or the ComboBox) then  there is this  GridDropDownColumn.
And if you want to databind it just set the datasource .
Then the question comes to how to add the empty item to the dropdown
For ex you want 3 items in the combo and "--None--" as the default item in the dropdown box
And if "--None--" is selected it should return null as value.
The EmptyListItemValue  property comes to help, set these 3 properties as below 

EmptyListItemText="None" EmptyListItemValue="" EnableEmptyListItem="True"

 <telerik:GridDropDownColumn HeaderText="TargetOrganisation" 
ListValueField="ID" UniqueName="TargetOrganisationID" 
 DataField="TargetOrganisationID" 
ListTextField="Alias" DataSouceID="edsOrganisation"EmptyListItemText="None" EmptyListItemValue="" EnableEmptyListItem="True">
</telerik:GridDropDownColumn>

EF 4 and Membership Provider

Asp.Net's MembershipProvider is very useful. It has builtin user role access system , good encryption features and more. To make it work with EF you need to override MembershipProvider. Here is a project that  to make these two work: http://efmembership.codeplex.com/

I chose to use the older version 1.0 which is for EF 4.0  , the latest one works with EF4.2 and it's Code First and I m not very Code First fan , I prefer  to design so I chose Model First . After downloading the project I had to make changes to make it compile. And I also downloaded another tool which helps a lot using EF.

Normally for every single change you make in the  Model , you need to recreate all the tables or get the DDL  Difference and apply the difference script to database , this tools does detect incremental changes and migrare both schema and data so you wont be losing anything:http://visualstudiogallery.msdn.microsoft.com/df3541c3-d833-4b65-b942-989e7ec74c87
It has some bugs though. After making changes in your datamodel in EF you can create the SQL script to apply changes. I use the Table Per Type instead of Table Per Hierarchy.

 Although both EfRoleProvider and EFMembershipProvider classes in the overridden MEmbershipProvider  contain methods commonly needed, I recreated alternative methods as I don't like the signatures of some .
For example instead of passing/retrieving  string array as RoleNames or User names I want to pass/retrieve List<Object> or Collection of objects. This is the overridden GetRolesForUser method which returns a string array, which I think is very impractical:

    public override string[] GetRolesForUser(string username)

And this is my method which returns Role objects as IList: 

  public static List<Role> GetUsersRoles(string userName)
  {
        User user;
        using (Entities entities = new Entities())
        {
            entities.Connection.Open();
user = entities.Users.Include("Roles").FirstOrDefault(p => p.Username == userName);
        }
 
        if (user != null)
        {
            return user.Roles.ToList();
        }
        else
        {
            return null;
        }
    }

Permanent Fix to "Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information"

I keep getting this "Unable to load one or more of the requested types. Retrieve the LoaderExceptions property for more information" Every time I had to restart IIS to temporarily fix it. I tried many things to resolve the issue nothing really helped. Finally I have a permanent fix : It's fixed in .Net 4.5 framework You have to install .NEt 4.5 and do nothing else. According to forums 4.5 requires VS 2012 And I m still using 2010

MembershipProvider and getting UserID

Common scenario is you will need the the Identity key of the logged in user You can achieve it like this: (Guid)Membership.GetUser().ProviderUserKey But this will make a call to database , so you may want to store UserID in session or maybe store it in Forms Authentication cookie. I will update about the Forms Authentication way

RadDatePicker and databinding at design time

RadDatePicker and databinding at design time If you want to bind RadDatePicker at design time , ( like using selectedvalue property of other asp.net controls ) , you can use the DbSelectedDate property:

 <telerik:RadDatePicker runat="server" ID="rdDeterminationDate"   
   
 DbSelectedDate='<%#Bind("DeterminationDate") %>' >  
   
 </telerik:RadDatePicker>  

EntityDataSource optional where parameter

You can achieve it like this : Where="it.ID=@CompanyID or @CompanyID is NULL" I also tried "or @CompanyID== NULL" , but that didn't work Another way to is to use onSelecting event of the entity data source and create the where clause there

RadGrid Getting Datakey value of selected row's

GeneralHelper.DeleteContact((int)((GridDataItem)e.Item).GetDataKeyValue("ID"));

Falling Skies and Walking Dead

Amazing similarities between each of these Millennialism thoughts? clean up the world from ? we are watching them because we feel disgusted i think !