C# 之文件拖拽和pixturBox缩放与拖拽

文本拖拽:

 效果:将一个文件拖拽到窗体的某部控件时,将该控件的路线显示在该控件上,只要得到了路线自然可以读取文件中的内容了。

 

 将一个控件的特性AllowDrop设置为true,然后添加DragDrop、DragEnter时间处理函数,如下:

 

private void txtAppPath_DragEnter(object sender, System.Windows.Forms.DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
            {
                e.Effect = DragDropEffects.Link;
            }
            else
            {
                e.Effect = DragDropEffects.None;
            }
        }

        private void txtAppPath_DragDrop(object sender, System.Windows.Forms.DragEventArgs e)
        {
            txtLocalFileName.Text = ((System.Array)e.Data.GetData(DataFormats.FileDrop)).GetValue(0).ToString();
        }

 

图片的缩放和拖拽:

 

一、实现鼠标滚轮控制图片缩放;

 

1、设置PixtureBox属性:

 

  Dock:none

 

  SizeMode:StretchImage

 

2、添加风波:

(1)设置绑定图片路径

 

private void ScrewInfoForm_Shown(object sender, EventArgs e)
        {
            //加载装配图纸
            string drawingPath = Path.Combine(@"\\192.168.2.136\PCS", productCode + ".png");
            try
            {
                pbxDrawing.Load(drawingPath);
            }
            catch (Exception ex)
            {
                MessageBox.Show("加载装配图纸失败,详细:" + ex.Message, "测量", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return;
            }
        }

 

(2)添加事件1

 

 

pbxDrawing.MouseWheel += new MouseEventHandler(pbxDrawing_MouseWheel);

 

 

//实现滚轮缩放
        private void pbxDrawing_MouseWheel(object sender, System.Windows.Forms.MouseEventArgs e)
        {
            if (e.Delta < 0)
            {
                this.pbxDrawing.Width = this.pbxDrawing.Width * 9 / 10;
                this.pbxDrawing.Height = this.pbxDrawing.Height * 9 / 10;
            }
            else
            {
                this.pbxDrawing.Width = this.pbxDrawing.Width * 11 / 10;
                this.pbxDrawing.Height = this.pbxDrawing.Height * 11 / 10;
            }
        }

 

(3)添加事件2

//实现移动图片
        int xPos;
        int yPos;
        bool MoveFlag;
        private void pbxDrawing_MouseDown(object sender, MouseEventArgs e)
        {
            this.pbxDrawing.Focus();
            MoveFlag = true;//已经按下.
            xPos = e.X;//当前x坐标.
            yPos = e.Y;//当前y坐标.
        }

        //在picturebox的鼠标按下事件里.
        private void pbxDrawing_MouseUp(object sender, MouseEventArgs e)
        {
            MoveFlag = false;
        }

        //在picturebox鼠标移动
        private void pbxDrawing_MouseMove(object sender, MouseEventArgs e)
        {
            if (MoveFlag)
            {
                pbxDrawing.Left += Convert.ToInt16(e.X - xPos);//设置x坐标.
                pbxDrawing.Top += Convert.ToInt16(e.Y - yPos);//设置y坐标.
            }
        }

 

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