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

Top 5 Contributors of the Month
david stephan
Gaurav Pal
Post New Web Links

Need help with late binding on bindingsource field

Posted By:      Posted Date: September 08, 2010    Points: 0   Category :Sql Server
This is an error that popped up with after setting option strict to on   option strict disallows late binding   The error is on the field in red If customer_data_reader("CustID") = (customer_bindingsource.Current("CustID") Then          i was looking at this but i cannot find what type this is exactly   If CStr(customer_data_reader("CustID")) = Ctype(customer_bindingsource.Current("CustID"), ????????) Then      It is a field, but how would i set the type for this? Or do i need to do something different?   Thanks Jeff

View Complete Post

More Related Resource Links

Early Late binding & Polymorphism question

Hi,I read this online about early & late binding.. I don't understand (the example below) how it is, can anyone explain why?Early binding:: Properties and method can be identified by compile time.Example: dim rs as recordsetLate binnding: Properties and method can be identified by Run time.Example: dim obj as classnameset obj=new classnamePolymorphism:Also, why the reason they are said Method overloading & OverridingExample of Compile Time Polymorphism: Method OverloadingExample of Run Time Polymorphism: Method OverridingCan anyone explain the logic behind these two? Thanks in advanceThanks

Binding list to form not working with '&' character in list field data

Hi, I have a SharePoint list with a field called Title. I have a form based on this list with the field bound to the form as a label (for workflow to access). Here is the code for the form field. <asp:Label runat="server" id="ff2{$Pos}" text="{@Title}" __designer:bind="{ddwrt:DataBind('u',concat('ff2',$Pos),'Text','','ID',ddwrt:EscapeDelims(string(@ID)),'@Title')}" /> I have a workflow that runs through a form action button which take ff2 (title) and  does other stuff. The problem I have is with records where the value of 'title' contains the '&' character (example ab&cd). Blank is pulled in by the workflow when I get the value of ff2. I am guessing it has to do with the data binding and/or escape (special) characters coming through but I don't know how to fix it. Any help will be greatly appreciated

How can I pass a NULL value as [in,out] argument to a COM method using late binding?


Suppose I have the following method in a COM interface defined in a C++ IDL:

[id(8)] HRESULT MyMethod([in,out,defaultvalue(NULL)] LONG* value, [out, retval] BSTR* returnValue);

Now I want to call this method passing in NULL for the 'value' parameter using late binding in C#. How can this be accomplished?

The following works if I want to pass a non-null argument as value:

         Type type = Type.GetTypeFromCLSID(new Guid("{7DA7BD6A-3E11-4E6B-BDE3-7C968A085F94}"));
         object instance = Activator.CreateInstance(type);

         object[] arguments = new object[] { 101 };

         ParameterModifier modifier = new ParameterModifier(1);

         modifier[0] = true;

         type.InvokeMember("[DispID=8]", BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.Public, null, instance, arguments, new ParameterModifier[] { modifier }, null, null);

         Console.WriteLine("Value after call: {0}", arguments[0]);

But how can I pass NULL? Using 'null' or Type.Missing give me type

Binding values to text box field in xslt page


Hi i have the SQLite data table which i have coverted to an xml page. for this xml page i'm using xslt to display page. in this xslt page i have a table similar to that Sqlite table but in each <td></td> i have inserted a text box so that it can be editable and updatable like

<td> <input id="TextBoxlocalMarkup" type="text" class="text1" disabled="disabled"></input> </td>

<td> <input id="TextBoxLocalSurcharge" type="text" class="text1" disabled="disabled"/> </td> 

i want to display the values in these text boxes... How can i do that in xslt for-each loop

Binding password to password field


I have a form that is used to add and edit data. Based on a dropdown selection, the form is either prepopulated or left blank so you can add new data.

I have a password field that is set to TextMode="Password" and works fine when adding new data, it displays ***** as you type..

Now if you select from the dropdown and there is already a record on file, it populates the form to allow you to edit the information.. Now i DONT want to display the password in plain text, but i want to populate the field so if they make any changes all field data is kept and table is updated with all of it.


I already debugged the page and my variable is being set with the password, but the textbox doesnt even show the ***** for the password value.

Model Binding - Byte[] field


I have a class that has a byte[]  type field in it. When I create a strongly-typed view for this class, this byte[] type field is missing from the generated rendering. I am using MVC2 VS2010. Is this a bug ?

Secondly, what is the best way to render it as a Hidden field ?





VB.Net Late binding operations cannot be converted to an expression tree.


Hi I get this error
"Late binding operations cannot be converted to an expression tree."

At all my x.NAME) lines !?

Im new to this so can anyone say me why i get this error..
Hvorfor gør den det !?


        <div>Navn: <%: Html.EditorFor(Function(x) x.Name)%></div>
        <div>Linje 1: <%: Html.EditorFor(Function(x) x.Line1)%></div>
        <div>Linje 2: <%: Html.EditorFor(Function(x) x.Line2)%></div>
        <div>Linje 3: <%: Html.EditorFor(Function(x) x.Line3)%></div>
        <div>Postnr: <%: Html.EditorFor(Function(x) x.Zip)%></div>
        <div>By: <%: Html.EditorFor(Function(x) x.City)%></div>
        <div>Landsdel: <%: Html.EditorFor(Function(x) x.Country)%></div>
            <%: Html.EditorFor(Function(x) x.GiftWrap)%>
            Disse vare skal i Gaveindpakning.

loading generic types with late binding




  I'm trying to late bind a generic datatype at runtime.  Basically the assembly for this generictype is in a different directory (not a sub directory).  So I can't use private probing.  Its not reliably in the GAC either, so I can't depend on that.  I can load several other types from this assembly but not this generic type.


So in the assembly the datatype is of the form MyGenericDataType

and at runtime I want the type of MyGenericDataType.


Any idea how to do that?  I tried:


Code Block

Assembly MyAssembly = Assembly.LoadFile("Path to assembly DLL");


Type MyType = MyAssembly.GetType("MyGenericDataType<MyRegularDataType>");




MyType always equals null.


Do I need to load MyGenericDataType first and then somehow convert it to MyGenericDataType ?



Binding WPF Controls to an Entity Data Model

In this interview, programming writer, McLean Schofield, demonstrates how to bind WPF controls to an entity data model, using Visual Studio 2010 Beta 1. You can also learn more in the topic: Walkthrough: Binding WPF Controls to an Entity Data Model.

Binding the multiple drop down boxes in GridView using JQuery in ASP.NET

Here is the code for binding the multiple drop down boxes in GridView using JQuery in ASP.NET

Binding WPF Controls to an Entity Data Model

In this interview, programming writer, McLean Schofield, demonstrates how to bind WPF controls to an entity data model, using Visual Studio 2010 Beta 1. You can also learn more in the topic: Walkthrough: Binding WPF Controls to an Entity Data Model.

WPF / Silverlight tutorial: Visibility property and binding

Visibility property is a very powerful and yet often overlooked property available in both WPF and Silverlight. It enables you to set Visibility of certain UIElement objects to different states like: Visible, Collapsed and Hidden (not supported by Silverlight). This tutorial shows you how to use it and how to bind to Visibility property

calculation, field and map traverse adjustment, and coordinate transformation

Free Pocket PC land surveying software -- COGO calculation, field and map traverse adjustment, and coordinate transformation -- for students and professionals.

Binding an array to dropdown list


I have the following string which is a list of urls. How do I get this to work so the url shows for the selection and also is the value?      


allLinks = newAllLinks
        Me.DropDownList1.DataTextField = "Link"
        Me.DropDownList1.DataValueField = "LinkURL"
        Me.DropDownList1.Items.Insert(0, New ListItem(" - Select - ", 0))
        Me.DropDownList1.DataSource = allLinks


 ArgumentNullException: Value cannot be null.
Parameter name: container]
   System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName) +121
   System.Web.UI.DataBinder.GetPropertyValue(Object container, String propName, String format) +8

Dropdown Event (Template Field)



I have grid view control that includes a dropdown control in a template field.

I wish to execute some code when the value is changed in the dropdown list.  Can't figure out how to capture this event though?

Any suggestions?

How to take value of bound field of grid in a variable or in a textbox.


How to take value of bound field of grid in a variable or in a textbox.

 I m using this code in .aspx page for grid.

<asp:GridView ID="Grd_Mprocess" runat="server" AutoGenerateColumns="False"

                      Width="100%" AllowPaging="True"


                      AllowSorting="True" PageSize="5"  >

                 <RowStyle CssClass="odd" />


<asp:BoundField HeaderText="DOC_TYPE_PK" DataField="DOC_TYPE_PK"  Visible="true" >


  <asp:TemplateField HeaderText="DOC TYPE ID" Visible="true">  &nbs

Binding Nested Listviews in MVC ViewPage


I am a longtime .NET developer but for big applications and services.  This is my first asp.net project and I have chosen MVC.   I have a need for nesting a ListView within a ListView.  In this simple catalog app, I have EF 4 Entities that are Categories, SubCategories, ItemTypes, and Items.

My goal is to display a 5 column layout of SubCategories with their ItemTypes below them in a ViewPage.  I did just fine with it done out in C# as server directives such as:

    var subcats = Model.SubCategory.ToArray();
    var nrSubCats = subcats.Count();
    var rows = (nrSubCats/5) + (((nrSubCats % 5) > 0) ? 1 : 0);
    for (var row = 0; row < rows; row++)
    { %>
        <div style="width: 100%; float: left; clear: right;">
        var start = row * 5;
        for (var i = start; (i < start + 5) && (i < nrSubCats); i++)
        var subcat = subcats[i];
            <div style="float: left; clear: right; width: 20%; margin-left: 5;">
                <h2> <%:subcat.Name%></h2>
                    foreach (var its in subcat.ItemType)
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