我如何使用（Memorystream Ms = New Memorystream（）） [英] How Do I Use Using (Memorystream Ms = New Memorystream())

问题描述

我试图爬行条形码生成器，继承我的代码：

hi , im trying to creeate a barcode generator , heres my code:

using (MemoryStream ms = new MemoryStream())
            {
                barcode.Save(ms, ImageFormat.Png);
                pictureBox1.Image = bitmap;
                pictureBox1.Height = bitmap.Height;
                pictureBox1.Width = bitmap.Width;

继承人我的错误

'字符串'不包含'保存'的定义并且没有扩展方法'保存'接受类型'字符串'的第一个参数可以找到（你是否错过了使用指令或汇编引用？）

我应该使用什么样的refremce？我所有的当前参考>

heres my error
'string' does not contain a definition for 'Save' and no extension method 'Save' accepting a first argument of type 'string' could be found (are you missing a using directive or an assembly reference?)
what refremce should i use for this? all my current refrences>

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.IO;
using System.Drawing.Imaging;

推荐答案

更改

change

barcode.Save(ms, ImageFormat.Png);

to

to

bitmap.Save(ms, ImageFormat.Png);

条形码是一个字符串 - 错误信息表明 - 这意味着它不是条形码的图像，它是一个包含文章编号的字符串：5013719020011

如果你想转换它例如，对于MemoryStream，您可以将图像字节保存在数据库中，然后您需要首先从该数字创建条形码图像。框架不知道你想要Code 39或EAN128条形码只是因为你有一个字符串中的数字！ ：笑：



看看你的其余代码，看看你在哪里创建了图像 - 我怀疑你想要使用位图而不是。

barcode is a string - the error message says that - which means that it isn't an image of a barcode, it's a string containing the Article Number: "5013719020011"
If you want to convert it to a MemoryStream so you can save the image bytes in a database for example, then you need to first create a barcode image from that number. The framework doesn't know that you want a Code 39 or an EAN128 barcode just because you have a number in a string! :laugh:

Look at the rest of your code, and see where you have create the image - I'd suspect that you want to use bitmap instead.

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