C# Discussion Boards - CodeProject

3-May-15 1:17

Hi, I'm fairly new to C# and recently I started developing a speech recognition program. At the moment I have a grammar builder which reads from a text file. This means it will only recognise a command if it's in that text file. I would really like to implement Google speech in to my program so I can search google, youtube etc without adding it to a text file. I know you can do it because I've seen people do it and it works by sending a audio file and then Google sends back the closest to confidence text.

If possible I'd really like for someone to help me to implement this. My current code(the rest is just commands) http://pastebin.com/yukznbeD[^]

Richard MacCutchan3-May-15 2:14

See https://docs.google.com/document/d/1vH9Zf86XNuqIwUFg5OJn56Q2qP3HeMEUoezx0NPQddY/edit[^].

3-May-15 2:14

Member 114365473-May-15 2:17

3-May-15 2:17

Yes this is something that I'm looking for but I'm not sure how I would implement this into my C# project.

Richard MacCutchan3-May-15 2:24

3-May-15 2:24

You start by studying the documentation.

Member 114365473-May-15 2:27

3-May-15 2:27

I've been reading various articles and topics over the past few days. But most of them are either how to implement them into a website or something else. I just found a vb.net code snippet of how to do this so I converted it into C# so I have the right code I just don't know how I would record a flac file or add it to my code.

Sascha Lefèvre3-May-15 3:00

Sascha Lefèvre

3-May-15 3:00

I have no experience with that, but did you take a look here?

Fun with Google Speech Recognition Service[^]

https://www.google.com/search?q=google+record+flac+c%23&ie=utf-8&oe=utf-8[^]

If the brain were so simple we could understand it, we would be so simple we couldn't. — Lyall Watson

Member 114365473-May-15 3:30

3-May-15 3:30

I just downloaded this and spent some time looking at it. It looks useful although I have no idea how to implement all this. I'm thinking about hiring someone to do this for me because there is no way I'm going to be able to do this.

OriginalGriff3-May-15 3:53

3-May-15 3:53

Member 11436547 wrote:
there is no way I'm going to be able to do this.

Well, you will never be able to do it unless you at least try.

If you hire someone, all you will get is more code you don't understand, can't maintain, and which doesn't help you with the next version.
If you at least try, you may learn something - and sufficient learning means you ended up doing it yourself all along.

But...if you want to hire someone I suggest you go to Freelancer.com and ask there.
But be aware: you get what you pay for. Pay peanuts, get monkeys.

Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

Member 114365473-May-15 4:06

3-May-15 4:06

Yes you're right but I have no idea how to even start Frown | :(

OriginalGriff3-May-15 4:17

3-May-15 4:17

You have a lot of reference documents: start reading them!

None of us know where to start when it comes to something completely new; and since there are never tutorials that specify exactly what you want to do (or there would be no point in doing it at all) all we can do is start reading, start thinking, and start trying! Laugh | :laugh:

Give it a go. What's the worst that can happen? You have to throw away what you have done and restore from a backup! Wink | ;)

And BTW: No, I've never tried Google speech to text... Laugh | :laugh:

Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

Member 114365473-May-15 4:29

3-May-15 4:29

Thank you! That was so motivational! You're right what's the worse that can happen Smile | :)

OriginalGriff3-May-15 4:46

3-May-15 4:46

You're welcome! Thumbs Up | :thumbsup:

Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

code dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString() doesnt work

Gerry Schmitz3-May-15 10:45

Gerry Schmitz

3-May-15 10:45

What OG said.

Even if you hire someone, you need to educate yourself to some level first; else you will not know if you are being taken advantage of.

aahamdan2-May-15 6:24

aahamdan

2-May-15 6:24

Dear Experts,

I am trying to get the value for current cell in DatagridView. I wrote code

dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString();

in CellLeave event.
but the code raise an error.
Object reference not set to an instance of an object.

But if I write the code in Button_Click event, it is working properly.
Please help.

Ahmad

Re: code dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString() doesnt work

OriginalGriff2-May-15 6:39

Re: code dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString() doesnt work

2-May-15 6:39

Use the debugger.
When you get the exception, use the debugger to look at the various parts of that, and work out what the values of each part are: e.ColumnIndex, e.RowIndex, and so forth.

Personally, I'd be using dataGridView1.Rows[rowindex].Cells[columnIndex] and checking the return value to make sure there is one.

I suspect you have just mixed up the row and column, and been lucky not to get an index out of range error.
But the debugger is the best way to find out.

Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

aahamdan2-May-15 6:48

aahamdan

2-May-15 6:48

Thank you Sir,
I have tried your code, but I get the same error.
Below is the exception message I received.

The code works under Button_Cleck event.

System.NullReferenceException was unhandled
  Message=Object reference not set to an instance of an object.
  Source=ERP
  StackTrace:
       at ERP.frmCalendar.dataGridView1_CellLeave(Object sender, DataGridViewCellEventArgs e) in C:\Projects\ERP\ERP\GL\frmCalendar.cs:line 103
       at System.Windows.Forms.DataGridView.OnCellLeave(DataGridViewCellEventArgs e)
       at System.Windows.Forms.DataGridView.OnCellLeave(DataGridViewCell& dataGridViewCell, Int32 columnIndex, Int32 rowIndex)
       at System.Windows.Forms.DataGridView.CommitEdit(DataGridViewCell& dataGridViewCurrentCell, DataGridViewDataErrorContexts context, DataGridViewValidateCellInternal validateCell, Boolean fireCellLeave, Boolean fireCellEnter, Boolean fireRowLeave, Boolean fireRowEnter, Boolean fireLeave)
       at System.Windows.Forms.DataGridView.EndEdit(DataGridViewDataErrorContexts context, DataGridViewValidateCellInternal validateCell, Boolean fireCellLeave, Boolean fireCellEnter, Boolean fireRowLeave, Boolean fireRowEnter, Boolean fireLeave, Boolean keepFocus, Boolean resetCurrentCell, Boolean resetAnchorCell)
       at System.Windows.Forms.DataGridView.CommitEditForOperation(Int32 columnIndex, Int32 rowIndex, Boolean forCurrentCellChange)
       at System.Windows.Forms.DataGridView.ScrollIntoView(Int32 columnIndex, Int32 rowIndex, Boolean forCurrentCellChange)
       at System.Windows.Forms.DataGridView.TabToNextCell()
       at System.Windows.Forms.DataGridView.ProcessTabKey(Keys keyData)
       at System.Windows.Forms.DataGridView.ProcessDialogKey(Keys keyData)
       at System.Windows.Forms.Control.ProcessDialogKey(Keys keyData)
       at System.Windows.Forms.TextBoxBase.ProcessDialogKey(Keys keyData)
       at System.Windows.Forms.Control.PreProcessMessage(Message& msg)
       at System.Windows.Forms.Control.PreProcessControlMessageInternal(Control target, Message& msg)
       at System.Windows.Forms.Application.ThreadContext.PreTranslateMessage(MSG& msg)
       at System.Windows.Forms.Application.ThreadContext.System.Windows.Forms.UnsafeNativeMethods.IMsoComponent.FPreTranslateMessage(MSG& msg)
       at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at ERP.frmLogin.runAppl() in C:\Projects\ERP\ERP\frmLogin.cs:line 103
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException:

Re: code dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString() doesnt work

OriginalGriff2-May-15 7:18

Re: code dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString() doesnt work

2-May-15 7:18

So use the debugger and find out which bit is null.
Then you can look at why!

But I can't do that for you - I have no access to your computer...

Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

Henrik Jonsson2-May-15 7:05

Henrik Jonsson

2-May-15 7:05

Hi,

when you get "Object reference not set to an instance of an object" exceptions some of the properties you invoke have returned null, in this case most likely Value for an empty grid cell. Check the Value for null before using it:

var gridValue = dataGridView1[e.ColumnIndex, e.RowIndex].Value;
if( gridValue != null )
{
    string gridStringValue = gridValue.ToString();
...
}

Re: code dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString() doesnt work

V.4-May-15 22:58

4-May-15 22:58

string cellval = "";
if(dataGridView1[e.ColumnIndex, e.RowIndex].Value != null){
  cellval = dataGridView1[e.ColumnIndex, e.RowIndex].Value.ToString();
}

I usually use Convert.ToString(...); in such cases, because it will convert a null to "" automatically.
(not useful in all cases)

V.

(MQOTD rules and previous solutions)

How can I write string to a memory mapped file?

Member 116587422-May-15 0:52

Member 11658742

2-May-15 0:52

I want to write a string to a memory mapped file. I have used Marshalling to achieve desired size of string. I am getting an exception when I try to write my structure which contains a string and an int. If I remove the string, The code runs successfully.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Threading;
using System.Runtime.InteropServices;
using System.IO.MemoryMappedFiles;

namespace ConsoleApplication25
{
    class Program
    {
        static void Main(string[] args)
        {
            MemoryCreate<MemWriter> SharedData = new MemoryCreate<MemWriter>();
            MemWriter MemWriterObj = new MemWriter();
            if (!SharedData.open()) return;
            MemWriterObj.f=10;
            MemWriterObj.mystring = "Test";
            SharedData.Writer = MemWriterObj;
            Console.ReadLine();
            SharedData.close();
        }
    }
    class MemoryCreate<T> where T:struct
    {
        MemoryMappedFile mmf;
        MemoryMappedViewAccessor accessor;
       public bool open()
        {
           try
           {
               mmf = MemoryMappedFile.CreateNew("Test", 100);
               accessor = mmf.CreateViewAccessor(0, 0);
               return true;
           }
           catch(Exception e)
           {
               Console.WriteLine(e.Message);
               return false;
           }
       }
           public void close()
           {
               accessor.Dispose();
               mmf.Dispose();
           }
        public T Writer
           {
               set
               {
                   try
                   {
                       accessor.Write<T>(0, ref value);
                   }
                   catch(Exception e)
                   {
                       Console.WriteLine(e.Message);
                   }
               }
           }
        }
    [StructLayout(LayoutKind.Sequential,Pack=1,CharSet=CharSet.Ansi)]
    struct MemWriter
    {
        public int f;
        [MarshalAs(UnmanagedType.ByValTStr,SizeConst=16)] public string mystring;
    }
}

[edit]Code block added - OriginalGriff[/edit]

modified 2-May-15 7:15am.

Re: How can I write string to a memory mapped file?

Richard MacCutchan2-May-15 3:33

Re: How can I write string to a memory mapped file?

2-May-15 3:33

What exception?

Member 116587422-May-15 4:17

Member 11658742

2-May-15 4:17

The exception message is "The specified Type must be a struct containing no references. Parameter name: type"

Re: How can I write string to a memory mapped file?

Richard MacCutchan2-May-15 4:23