使用打开文件对话框将位图图像加载到Windows窗体中

| 我需要使用打开文件对话框以窗口形式打开位图图像(我将从驱动器中加载它)。图像应适合图片框。这是我尝试过的一些代码,但是出错了!
 private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog dlg = new OpenFileDialog();

            dlg.Title = \"Open Image\";
            dlg.Filter = \"bmp files (*.bmp)|*.bmp\";

            if (dlg.ShowDialog() == DialogResult.OK)
            {                     
            PictureBox PictureBox1 = new PictureBox();                    
                PictureBox1.Image(dlg.FileName);
            }

            dlg.Dispose();
        }
    
已邀请:
您必须使用构造函数重载(从磁盘上的文件加载图像)来创建
Bitmap
类的实例。现在编写代码时,您正在尝试使用
PictureBox.Image
属性,就好像它是一种方法一样。 更改代码,使其看起来像这样(还利用
using
语句来确保正确处理,而不是手动调用
Dispose
方法):
private void button1_Click(object sender, EventArgs e)
{
    // Wrap the creation of the OpenFileDialog instance in a using statement,
    // rather than manually calling the Dispose method to ensure proper disposal
    using (OpenFileDialog dlg = new OpenFileDialog())
    {
        dlg.Title = \"Open Image\";
        dlg.Filter = \"bmp files (*.bmp)|*.bmp\";

        if (dlg.ShowDialog() == DialogResult.OK)
        {
            PictureBox PictureBox1 = new PictureBox();

            // Create a new Bitmap object from the picture file on disk,
            // and assign that to the PictureBox.Image property
            PictureBox1.Image = new Bitmap(dlg.FileName);
        }
    }
}
当然,这不会在窗体上的任何地方显示图像,因为您创建的图片框控件尚未添加到窗体中。您需要使用
Add
方法将刚刚创建的新图片框控件添加到表单的
Controls
集合中。请注意此处添加到上述代码的行:
private void button1_Click(object sender, EventArgs e)
{
    using (OpenFileDialog dlg = new OpenFileDialog())
    {
        dlg.Title = \"Open Image\";
        dlg.Filter = \"bmp files (*.bmp)|*.bmp\";

        if (dlg.ShowDialog() == DialogResult.OK)
        {
            PictureBox PictureBox1 = new PictureBox();
            PictureBox1.Image = new Bitmap(dlg.FileName);

            // Add the new control to its parent\'s controls collection
            this.Controls.Add(PictureBox1);
        }
    }
}
    
工作良好。  尝试这个,
private void addImageButton_Click(object sender, EventArgs e)
{
    OpenFileDialog of = new OpenFileDialog();
    //For any other formats
    of.Filter = \"Image Files (*.bmp;*.jpg;*.jpeg,*.png)|*.BMP;*.JPG;*.JPEG;*.PNG\"; 
    if (of.ShowDialog() == DialogResult.OK)
    {
        pictureBox1.ImageLocation = of.FileName;

    }
}
    
您应该尝试: 以形式直观地创建图片框(更容易) 将图片框的“ 10”属性设置为“ 11”(如果您希望图像填写表格) 将Picturebox的
SizeMode
设置为
StretchImage
最后:
private void button1_Click(object sender, EventArgs e)
{
    OpenFileDialog dlg = new OpenFileDialog();
    dlg.Title = \"Open Image\";
    dlg.Filter = \"bmp files (*.bmp)|*.bmp\";
    if (dlg.ShowDialog() == DialogResult.OK)
    {                     
        PictureBox1.Image = Image.FromFile(dlg.Filename);
    }
    dlg.Dispose();
}
    
private void button1_Click(object sender, EventArgs e)
{
    OpenFileDialog open = new OpenFileDialog();
    if (open.ShowDialog() == DialogResult.OK)
        pictureBox1.Image = Bitmap.FromFile(open.FileName);
}
    
您也可以这样尝试
PictureBox1.Image = Image.FromFile(\"<your ImagePath>\" or <Dialog box result>);
    
PictureBox.Image是属性,而不是方法。您可以这样设置:
PictureBox1.Image = System.Drawing.Image.FromFile(dlg.FileName);
    
您可以尝试以下方法:
private void button1_Click(object sender, EventArgs e)
    {
        OpenFileDialog fDialog = new OpenFileDialog();
        fDialog.Title = \"Select file to be upload\";
        fDialog.Filter = \"All Files|*.*\";
        //  fDialog.Filter = \"PDF Files|*.pdf\";
        if (fDialog.ShowDialog() == DialogResult.OK)
        {
            textBox1.Text = fDialog.FileName.ToString();
        }
    }
    
这很简单。只需添加:
PictureBox1.BackgroundImageLayout = ImageLayout.Zoom;
    

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