using Microsoft.Office.InfoPath;
using System;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using System.Xml;
using System.Xml.XPath;
using mshtml;

namespace Sign2
{
public partial class FormCode
{
Topaz.SigPlusNET SigPlusNET1;

// NOTE: The following procedure is required by Microsoft Office InfoPath.
// It can be modified using Microsoft Office InfoPath.
public void InternalStartup()
{
((ButtonEvent)EventManager.ControlEvents["CTRL1_5"]).Clicked += new ClickedEventHandler(CTRL1_5_Clicked);
((ButtonEvent)EventManager.ControlEvents["CTRL2_5"]).Clicked += new ClickedEventHandler(CTRL2_5_Clicked);
((ButtonEvent)EventManager.ControlEvents["CTRL3_5"]).Clicked += new ClickedEventHandler(CTRL3_5_Clicked);
((ButtonEvent)EventManager.ControlEvents["CTRL7_5"]).Clicked += new ClickedEventHandler(CTRL7_5_Clicked);
((ButtonEvent)EventManager.ControlEvents["CTRL8_5"]).Clicked += new ClickedEventHandler(CTRL8_5_Clicked);
((ButtonEvent)EventManager.ControlEvents["CTRL9_5"]).Clicked += new ClickedEventHandler(CTRL9_5_Clicked);
}

// NOTE: The following procedure is required by Microsoft Office InfoPath.
// It can be modified using Microsoft Office InfoPath.

public void CTRL1_5_Clicked(object sender, ClickedEventArgs e)
{
// Initiate the signature pad
SigPlusNET1 = new Topaz.SigPlusNET();

SigPlusNET1.SetTabletState(1);
}

public void CTRL2_5_Clicked(object sender, ClickedEventArgs e)
{
if (SigPlusNET1.NumberOfTabletPoints() > 0)
{

Image myimage = null;

SigPlusNET1.SetImageXSize(250);
SigPlusNET1.SetImageYSize(100);
SigPlusNET1.SetJustifyMode(5);
SigPlusNET1.SetImagePenWidth(7);

SigPlusNET1.SetImageFileFormat(0);
if (SigPlusNET1.NumberOfTabletPoints() > 0)
{
myimage = SigPlusNET1.GetSigImage();
}
else
{
MessageBox.Show(“Please sign the signature pad and try again”);
return;
}

/// set the form picture field to the image read from the SigPad
// get access to the picture attachment field
XPathNavigator MyPic = this.CreateNavigator().SelectSingleNode(“/my:myFields/my:Signature”, NamespaceManager);
DeleteNil(MyPic);

// this is where the real work is done. Simply take the bytes from the signature image and convert them to base64.
MyPic.SetValue(Convert.ToBase64String(imageToByteArray(myimage)));

/// cleanup
// dispose of the field
MyPic = null;
}
else
{
MessageBox.Show(“No signature captured!”);
}
}

public void CTRL3_5_Clicked(object sender, ClickedEventArgs e)
{
SigPlusNET1.ClearTablet();

// get access to the picture attachment field
XPathNavigator MyPic = this.CreateNavigator().SelectSingleNode(“/my:myFields/my:Signature”, NamespaceManager);
DeleteNil(MyPic);

// Clear the signature
MyPic.SetValue(“”);
}
public void CTRL7_5_Clicked(object sender, ClickedEventArgs e)
{
// Initiate the signature pad
SigPlusNET1 = new Topaz.SigPlusNET();

SigPlusNET1.SetTabletState(1);
}

public void CTRL8_5_Clicked(object sender, ClickedEventArgs e)
{
if (SigPlusNET1.NumberOfTabletPoints() > 0)
{

Image myimage = null;

SigPlusNET1.SetImageXSize(250);
SigPlusNET1.SetImageYSize(100);
SigPlusNET1.SetJustifyMode(5);
SigPlusNET1.SetImagePenWidth(7);

SigPlusNET1.SetImageFileFormat(0);
if (SigPlusNET1.NumberOfTabletPoints() > 0)
{
myimage = SigPlusNET1.GetSigImage();
}
else
{
MessageBox.Show(“Please sign the signature pad and try again”);
return;
}

/// set the form picture field to the image read from the SigPad
// get access to the picture attachment field
XPathNavigator MyPic = this.CreateNavigator().SelectSingleNode(“/my:myFields/my:Signature2″, NamespaceManager);
DeleteNil(MyPic);

// this is where the real work is done. Simply take the bytes from the signature image and convert them to base64.
MyPic.SetValue(Convert.ToBase64String(imageToByteArray(myimage)));

/// cleanup
// dispose of the field
MyPic = null;
}
else
{
MessageBox.Show(“No signature captured!”);
}
}

public void CTRL9_5_Clicked(object sender, ClickedEventArgs e)
{
SigPlusNET1.ClearTablet();

// get access to the picture attachment field
XPathNavigator MyPic = this.CreateNavigator().SelectSingleNode(“/my:myFields/my:Signature2″, NamespaceManager);
DeleteNil(MyPic);

// Clear the signature
MyPic.SetValue(“”);
}

public void DeleteNil(XPathNavigator node)
{
if (node.MoveToAttribute(“nil”, “http://www.w3.org/2001/XMLSchema-instance”))
node.DeleteSelf();
}

public byte[] imageToByteArray(System.Drawing.Image imageIn)
{
MemoryStream ms = new MemoryStream();
try
{
imageIn.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);
}
catch
{
MessageBox.Show(“Conversion of image failed”);
}
return ms.ToArray();
}
}
}

No overload for method ‘SetSignatureImage’ takes ’1′ arguments (occurs twice)
The name ‘GetNavigator’ does not exist in the current context
The name ‘baseSignatureImage’ does not exist in the current context
The name ‘UnexpectedError’ does not exist in the current context

After trying on my own for a while, the best I could do was still having DeleteNil create the same error message as before.

Any help would be much appreciated

internal void SetSignatureImage(string base64Image, ClickedEventArgs e)
{

try
{
XPathNavigator imageField = GetNavigator(baseSignatureImage, e);
DeleteNil(imageField); //remove xsi:nil attribute
imageField.SetValue(base64Image);
}
catch
{
UnexpectedError();
}

}

An unhandled exception has occurred in the form’s code.

System.NullReferenceException
Object reference not set to an instance of an object.
at _0900_A_with_Signature.FormCode.DeleteNil(XPathNavigator node)
at _0900_A_with_Signature.FormCode.SetSignatureImage(String base64Image)
at _0900_A_with_Signature.FormCode.Button_Sign_Clicked(Object sender, ClickedEventArgs e)
at Microsoft.Office.InfoPath.Internal.ButtonEventHost.OnButtonClick(DocActionEvent pEvent)
at Microsoft.Office.Interop.InfoPath.SemiTrust._ButtonEventSink_SinkHelper.OnClick(DocActionEvent pEvent)

Any ideas on what I am doing wrong? any help would be greatly appreciated.

http://www2.ectorcountyisd.org/screenshots/capture.png

Thanks,
Shawn