I am currently writing a ping status monitoring ASP. But i could not figure out how to pass data from calling a action to controller.
My Action Code as follow:-
Function showPing2(ByVal ipaddress As String) As String
If ipaddress = 1 Then
Return "Online"
Else
Return "Offline"
End If
End Function
Calling method from Index.vbhtml
#Html.Action("showPing2(1)")
I could not pass the value like that, it keep showing the error "HttpException was unhandled by user code"
Could anyone please tell me how to correctly pass value in ASP .NET?
Thank you very much!!
Wrong syntax, try this:
#Html.Action("showPing2", new { ipaddress = "1" })
OR
#Html.Action("showPing2", "ControllerName", new { ipaddress = "1" })
Added
This is C# syntax as I understand from Anonymous Types (Visual Basic) or Anonymous class initialization in VB.Net, VB.NET is something like:
#Html.Action("showPing2", New With { .ipaddress = "1" })
Related
Does the twilio asp.net helper library package NOT work in vb.net? I can get it to work in c# web app but not vb.net web app.
In a vb.net web application project the following code doesnt send an sms message and when stepping through with the debugger, errs on the send message line and brings up a file dialog asking for access to core.cs. The twilio library's were installed via nuget.
Public Shared Sub SendAuthCodeViaSms(ByVal number As String)
Dim twilioAccountInfo As Dictionary(Of String, String) = XmlParse.GetAccountInfoFromXmlFile("twilio")
Dim accountSid As String = twilioAccountInfo("username")
Dim authToken As String = twilioAccountInfo("password")
If (Not String.IsNullOrEmpty(accountSid) AndAlso Not String.IsNullOrEmpty(authToken)) Then
Dim client = New TwilioRestClient(accountSid, authToken)
client.SendMessage(TwilioSendNumber, ToNumber, "Testmessage from My Twilio number")
Else
'log error and alert developer
End If
End Sub
But in a C# web API project the same code sends the message as expected.
protected void Page_Load(object sender, EventArgs e)
{
const string AccountSid = "mysid";
const string AuthToken = "mytoken";
var twilio = new TwilioRestClient(AccountSid, AuthToken);
var message = twilio.SendMessage(TwilioSendNumber,ToNumber,"text message from twilio");
}
and all the sid's and tokens and phone number formats are correct, otherwise the c# one wouldnt send and I wouldnt get to the client.SendMessage part of vb.net version (client.SendSMSMessage produces the same result)
Twilio evangelist here.
I tried our your code by creating a simple VB console app and it worked for me.
The only thing I can think of is that either you are not getting your Twilio credentials correctly when parsing the XML, or the phone number you are passing into the function is not formatted correctly.
I'd suggest putting the result of call to SendMessage() into a variable and checking to see if RestException property is null:
Dim result = client.SendMessage(TwilioSendNumber, ToNumber, "Testmessage from My Twilio number")
If (Not IsNothing(result.RestException)) Then
' Something bad happened
Endif
If Twilio returns a status code greater than 400, then that will show up as an exception in the RestException property and will give you a clue as to whats going on.
If that does not work, you can always break out a tool like Fiddler to watch and see if the library is making the property HTTP request and Twilio is returning the proper result.
Hope that helps.
How can i convert this code to VB.net
public void SetBooks(IEnumerable<Book> books)
{
if (books == null)
throw new ArgumentNullException("books");
new System.Xml.Linq.XDocument(books).Save(_filename);
}
in http://converter.telerik.com/ it says:
Public Sub SetBooks(books As IEnumerable(Of Book))
If books Is Nothing Then
Throw New ArgumentNullException("books")
End If
New System.Xml.Linq.XDocument(books).Save(_filename)
End Sub
But visual studio says "Syntax error." because of "New"
What is the keyword for this situation, i searched on Google but no result.
Actually, you can do it in one line with the Call keyword
Call (New System.Xml.Linq.XDocument(books)).Save(_filename)
You cannot initialize an object and use it in one statement in VB.NET (as opposed to C#). You need two:
Dim doc = New System.Xml.Linq.XDocument(books)
doc.Save(_filename)
In C# the constructor returns the instance of the created object, in VB.NET not.
I have a vb.net aspx page that i need to assign a session variable inside of javascript
if i do the following
var baz ="<%=Session("User")%>";
alert(baz);
the alert i receive is the class name
"TheName.WebFramework.Security.AdvanceUser"
i need a nested value of this session , and have no idea how to do this in vb
i do however know how to do this in C# / generic http handler
...
public void ProcessRequest (HttpContext context) {
IAdvanceUser user = context.Session["User"] as IAdvanceUser;
...
var ID = user.EntityID
and of course in php, RoR , ColdFusion, ect
I have tried this but it failed miserably
var baz ="<%=Session("User").("EntityId")%>";
alert(baz);
any ideas?
Try this: use CType(fromObjectHere, toObjectHere)
var baz ="<%= CType(Session("User"), AdvanceUser).EntityID %>";
Update
You might need to type the full name TheName.WebFramework.Security.AdvanceUser or import the namespace
<%= CType(Session("User"), TheName.WebFramework.Security.AdvanceUser).EntityID %>
I would like to deserialize the returned JSON from a service call in VB.NET to an anonymous type but I was having error. It works in C# using dynamic type but i dont know how to do it in VB.
Here is my JSON returned from a web service call:
{"format":"png","height":564,"width":864}
Here is my VB code json above assigned to param text:
Dim testObj = Newtonsoft.Json.JsonConvert.DeserializeObject(text)
But when i tried to access testObj.format, an exception was thrown with message
{"Public member 'format' on type 'JObject' not found."}
I already have added Option Strict Off. I dont want to use an Object/Class to deserialize the JSON. If its in C# assigning this to dynamic type will be working fine.
Can anyone please help? I am not expert in VB but I need to have this running on VB. TIA
Dim js As New System.Web.Script.Serialization.JavaScriptSerializer
Dim testObj = js.Deserialize(source, New Object().GetType())
Then you can access the key(attribute name)/values via:
value=testobj(key)
One more thing, you can access your Newtonsoft key(attribute name)/values through:
value=testObj.item(key)
Dim js As New System.Web.Script.Serialization.JavaScriptSerializer
Dim DeSerialObjEventData = New With {.Prop1 = String.Empty, .Prop2 = String.Empty, .Prop3 = String.Empty}...
Dim testObj = js.DeserializeAnnonomusType(source, DeSerialObjEventData)
I have an Access VBA project from where I refer to a COM Interop .TLB written in C#. This C# code simply queries the SQL Server database and returns values via a simple LINQ-to-Entity query.
I'm getting the same error mentioned in this question:
The specified named connection is either not found in the configuration, not intended to be used with the EntityClient provider, or not valid
However, in my case, it is a Access VBA in a .ADP application that refers to my .Net 4.0 TLB, instead of another .Net project.
I'm aware that if it were another .Net project, I could add the EF connection string XML in its app.config or web.config. But what is the fix if my 'calling' application is Access 2003 VBA?
Here's the VBA code that calls the .Net code
Dim CandidatePassword As String
Dim abc As New MISHash.Password
Dim PasswordStatus As Boolean
CandidatePassword = InputBox("Enter your password")
PasswordStatus = abc.IsValidPassword("myusername", CandidatePassword) ' FAILS HERE
If PasswordStatus Then
MsgBox "Password valid."
Else
MsgBox "Password failed."
End If
Please help. Thank you.
Update: Here is my C# code
using System.Linq;
using System.Runtime.InteropServices;
namespace MISHash
{
public class Password
{
public Password()
{
}
[ComVisible(true)]
public void HashAndSave(string SomePassword)
{
string hashed = BCrypt.HashPassword(SomePassword, BCrypt.GenerateSalt(12));
//save the hashed password in the database
}
[ComVisible(true)]
public bool IsValidPassword(string CandidateUserName, string CandidatePassword)
{
string OriginalHashedPassword;
using (MyDBEntities mycontext = new MyDBEntities())
{
OriginalHashedPassword = (from usr in mycontext.Users
where usr.UserName.Equals(CandidateUserName)
select usr.Password).FirstOrDefault();
}
bool matches = BCrypt.CheckPassword(CandidatePassword, OriginalHashedPassword);
return matches;
}
}
}
See this similar question:
Can I use / access the app.config from .net code, when called via COM
These two seem like your best options:
Manually create a secondary AppDomain
Convert to a VSTO project
Edit
You can also try passing a hard-coded connection string in the constructor:
MyDBEntities mycontext = new MyDBEntities("Server=.\SQLEXPRESS;Database=School;Trusted_Connection=true;Integrated Security=True;MultipleActiveResultSets=True"))