向窗体中拖放图片并显示代码,CSharp代码库,德仔网

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【CSharp】向窗体中拖放图片并显示
作者:Dezai.CN / 发布于2012/12/12/ 427
Frm_Main.cs

View Code 
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Data;
 using System.Drawing;
 using System.Linq;
 using System.Text;
 using System.Windows.Forms;
 using System.IO;//添加的命名空间，对文件进行操作
 using System.Threading;//线程序的命名空间
 
 namespace DragImageToForm
 {
     public partial class Frm_Main : Form
     {
         public Frm_Main()
         {
             InitializeComponent();
         }
 
         public static bool Var_Style = true;
         public static string tempstr="";
 
         /// <summary>
 /// 在窗体背景中显示被拖放的图片
 /// </summary>
 /// <param Frm="Form">窗体</param>
 /// <param e="DragEventArgs">DragDrop、DragEnter 或 DragOver 事件提供数据</param>
         public void SetDragImageToFrm(Form Frm, DragEventArgs e)
         {
             if (Var_Style == true)
             {
                 e.Effect = DragDropEffects.Copy;//设置拖放操作中目标放置类型为复制
                 String[] str_Drop = (String[])e.Data.GetData(DataFormats.FileDrop, true);//检索数据格式相关联的数据
                 string tempstr;
                 Bitmap bkImage;//定义Bitmap变量
                 tempstr = str_Drop[0];//获取拖放文件的目录
                 try
                 {
                     bkImage = new Bitmap(tempstr);//存储拖放的图片
 //根据图片设置窗体的大小
                     Frm.Size = new System.Drawing.Size(bkImage.Width + 6, bkImage.Height + 33);
                     Frm.BackgroundImage = bkImage;//在窗体背景中显示图片
                 }
                 catch { }
             }
         }
 
         private void Frm_Main_DragEnter(object sender, DragEventArgs e)
         {
             SetDragImageToFrm(this, e);//在窗体中显示拖放到窗体上的图片
         }
     }
 }

Frm_Main.designer.cs

View Code 
 namespace DragImageToForm
 {
     partial class Frm_Main
     {
         /// <summary>
 /// 必需的设计器变量。
 /// </summary>
         private System.ComponentModel.IContainer components = null;
 
         /// <summary>
 /// 清理所有正在使用的资源。
 /// </summary>
 /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param>
         protected override void Dispose(bool disposing)
         {
             if (disposing && (components != null))
             {
                 components.Dispose();
             }
             base.Dispose(disposing);
         }
 
         #region Windows 窗体设计器生成的代码
 
         /// <summary>
 /// 设计器支持所需的方法 - 不要
 /// 使用代码编辑器修改此方法的内容。
 /// </summary>
         private void InitializeComponent()
         {
             this.components = new System.ComponentModel.Container();
             this.panel_face = new System.Windows.Forms.Panel();
             this.contextMenuStrip1 = new System.Windows.Forms.ContextMenuStrip(this.components);
             this.Tool_Ima = new System.Windows.Forms.ToolStripMenuItem();
             this.Tool_File = new System.Windows.Forms.ToolStripMenuItem();
             this.contextMenuStrip1.SuspendLayout();
             this.SuspendLayout();
             // 
 // panel_face
 // 
             this.panel_face.ContextMenuStrip = this.contextMenuStrip1;
             this.panel_face.Dock = System.Windows.Forms.DockStyle.Fill;
             this.panel_face.Location = new System.Drawing.Point(0, 0);
             this.panel_face.Name = "panel_face";
             this.panel_face.Size = new System.Drawing.Size(391, 238);
             this.panel_face.TabIndex = 0;
             this.panel_face.Visible = false;
             // 
 // contextMenuStrip1
 // 
             this.contextMenuStrip1.Items.AddRange(new System.Windows.Forms.ToolStripItem[] {
             this.Tool_Ima,
             this.Tool_File});
             this.contextMenuStrip1.Name = "contextMenuStrip2";
             this.contextMenuStrip1.Size = new System.Drawing.Size(137, 48);
             // 
 // Tool_Ima
 // 
             this.Tool_Ima.Name = "Tool_Ima";
             this.Tool_Ima.Size = new System.Drawing.Size(136, 22);
             this.Tool_Ima.Tag = "1";
             this.Tool_Ima.Text = "拖放图片";
             // 
 // Tool_File
 // 
             this.Tool_File.Name = "Tool_File";
             this.Tool_File.Size = new System.Drawing.Size(136, 22);
             this.Tool_File.Tag = "2";
             this.Tool_File.Text = "拖放文件夹";
             // 
 // Frm_Main
 // 
             this.AccessibleRole = System.Windows.Forms.AccessibleRole.None;
             this.AllowDrop = true;
             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
             this.ClientSize = new System.Drawing.Size(391, 238);
             this.ContextMenuStrip = this.contextMenuStrip1;
             this.Controls.Add(this.panel_face);
             this.Name = "Frm_Main";
             this.Text = "向窗体中拖放图片并显示";
             this.DragEnter += new System.Windows.Forms.DragEventHandler(this.Frm_Main_DragEnter);
             this.contextMenuStrip1.ResumeLayout(false);
             this.ResumeLayout(false);
 
         }
 
         #endregion
 
         private System.Windows.Forms.Panel panel_face;
         private System.Windows.Forms.ContextMenuStrip contextMenuStrip1;
         private System.Windows.Forms.ToolStripMenuItem Tool_Ima;
         private System.Windows.Forms.ToolStripMenuItem Tool_File;
 
     }
 }
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