Web电子签集成开发笔记

前一段时间接触到电子签名的集成开发，一直没写笔记，故写此随笔。为记录、也为分享，希望大家对本文的不足之处加以指正。

首先先一一介绍我所用到的方法：

确定生成文件格式

var ext = ".bmp";

    if (m_ulFormat == 2) {
        ext = ".jpg";
    } else if (m_ulFormat == 3) {
        ext = ".png";
    } else if (m_ulFormat == 4) {
        ext = ".gif";
    } else if (m_ulFormat == 5) {
        ext = ".tiff"
    }

将签名文件转化为Base64Encode编码（由于开发商所提供的图片保存方法有问题，以至于绕一圈保存）。

var m_ulFormat;
function jsPacketsBase64Encode(ulFormat) {
    debugger;
    var obj = document.getElementById("myObject");
    m_ulFormat = ulFormat;
    var encodeingstring = "";
    //m_deviceID 设备型号判别 
    //ulFormat 图片格式
    if (m_deviceID === 1) {
        encodeingstring = obj.PPNature_PacketsBase64Encode(m_deviceID, ulFormat);
    } else if (m_deviceID === 2) {
        encodeingstring = obj.PPL398_PacketsBase64Encode(m_deviceID, ulFormat);
    } else if (m_deviceID === 5) {
        encodeingstring = obj.PPL500_PacketsBase64Encode(m_deviceID, ulFormat);
    } else if (m_deviceID === 6) {
        encodeingstring = obj.PPE580_PacketsBase64Encode(m_deviceID, ulFormat);
    } else if (m_deviceID === 7) {;
        encodeingstring = obj.PPL501f_PacketsBase64Encode(m_deviceID, ulFormat);
    } else if (m_deviceID === 8) {
        encodeingstring = obj.PPWrite2Go_PacketsBase64Encode(m_deviceID, ulFormat);
    } else if (m_deviceID === 9) {
        encodeingstring = obj.PPL1000_PacketsBase64Encode(m_deviceID, ulFormat);
    }

    return encodeingstring;
}

将base64流转化为图片

　　　　　/// <summary>
        /// 将base64流转化为图片
        /// </summary>
        /// <param name="imageFilePath">文件存储路径</param>
        /// <param name="str">Base64流</param>
        private void Base64StringToImage(string imageFilePath, string str)
        {
            try
            {
                byte[] bytes = Convert.FromBase64String(str);
                FileStream fs = new FileStream(@imageFilePath, FileMode.Create, FileAccess.Write);
                fs.Write(bytes, 0, bytes.Length);
                fs.Close();
            }
            catch (Exception e)
            {
                string path = "C:\Log";
                Logger log = new Logger(path);
                log.Log("图片生成失败！信息：" + e.Message);
            }
        }

以上即为此次电子签名开发的全部内容，为记录、也为分享。