无法在jpg图像上键入字符串

问题描述

Hellow
$ 1 $ b Form1我添加pictureBox1它包含一个图像= Tulips.jpg，我想在10,20位置画一个字符串

但我不能

Hellow
in Form1 i add pictureBox1 it contains an image =Tulips.jpg , i want to draw a string at location 10,20
but i could not

using System.Drawing.Imaging;
//...
//...
        Image MyImage;
        //....
        //.....
        private void Form1_Load(object sender, EventArgs e)
        {
            MyImage = Image.FromFile("Tulips.jpg");
            pictureBox1.Image = MyImage;
        }
        private void button1_Click(object sender, EventArgs e)
        {
            Graphics dc = Graphics.FromImage(pictureBox1.Image);//MyImage);
dc.DrawString("hellow", new Font("Arial", 12), new SolidBrush(Color.Black), 10, 20);//<----
            dc.Dispose();
        }

推荐答案

pictureBox1.Invalidate();

在您的绘制代码之后。



为了更改图像文件，您必须将图像保存为新文件。



BTW：你还应该处理你创建的Font和Brush对象。

after your draw code.

In order to change the image file, you will have to save the image to a new file.

BTW: you should also dispose the Font and Brush objects that you create.

private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
//your code to draw string
}

这篇关于无法在jpg图像上键入字符串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！