我怎么可以显示直接从内存的WebBrowser控件的形象呢? [英] How can I show an image in webBrowser control directly from memory?
问题描述
我怎么能直接从内存而不是硬盘显示WebBrowser控件中的图像?
当我使用RAM磁盘软件创建一个虚拟驱动器,可以解决图像源加载它就像这样:
IMG SRC =Z:/image.jpg即Z为RAM磁盘驱动器。是否有可能做,在.NET programmaticly?或者使用的MemoryStream这样做呢?
How can I show an image in webBrowser control directly from memory instead of hard disk? When I use RAM Disk software to create a virtual drive, it is possible to address an image source to load it like this: img src = "Z:/image.jpg" that Z is a RAM Disk drive. Is it possible to do that in .NET programmaticly? or use MemoryStream to do that?
我真的AP preciate这个建议。
I would really appreciate some suggestions about this.
推荐答案
您可以连接code以base64形象。例如:
You can encode the image in base64. For example
<img src="data:image/gif;base64,MyImageDataEncodedInBase64=" alt="My Image data in base 64" />
下面是你如何能做到这一点的完整示例:
Here is a full example of how you can accomplish this:
using System;
using System.IO;
using System.Runtime.InteropServices;
using System.Windows.Forms;
namespace ImageEncodedInBase64InAWebBrowser
{
[ComVisible(true)]
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
string url = Directory.GetCurrentDirectory() + "\\page.html";
webBrowser1.Url = new Uri(url);
webBrowser1.ObjectForScripting = this;
}
private void button1_Click(object sender, EventArgs e)
{
string imageInBase64 = ReadImageInBase64();
webBrowser1.Document.InvokeScript("setImageData", new[] { imageInBase64 });
}
private string ReadImageInBase64()
{
string imagePath = Directory.GetCurrentDirectory() + "\\opensource.png";
using (var fs = new FileStream(imagePath, FileMode.Open, FileAccess.Read))
{
var buffer = new byte[fs.Length];
fs.Read(buffer, 0, (int)fs.Length);
return Convert.ToBase64String(buffer);
}
}
}
}
和此Javascript code:
And this Javascript code:
function setImageData(imageBase64) {
var myImg = document.getElementById("myImg");
myImg.src = "data:image/png;base64," + imageBase64;
}
这篇关于我怎么可以显示直接从内存的WebBrowser控件的形象呢?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!