如何实现图片缩放功能??? 如何用C#代码实现对图片的放大和缩小,而且当pictureBox不够大显示的时候自动出现滚动条,麻烦各位大哥给点代码,感激涕零!!! 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 将 PictureBox 放入 Panel,并设置 PictureBox 的SizeMode为AutoSize,设置 Panel 为 AutoScroll为True。至于图片的放大和缩小,可以使用 Graphics.ScaleTransform() 方法。 我是新手,不明白 Panel 是什么? Panel 是一个控件工具箱里面有 using System;using System.Drawing;using System.Collections;using System.ComponentModel;using System.Windows.Forms;using System.Data;namespace Image{ /// <summary> /// Form1 的摘要说明。 /// </summary> public class Form1 : System.Windows.Forms.Form { private System.Windows.Forms.Button button1; private System.Windows.Forms.OpenFileDialog openFileDialog1; /// <summary> /// 必需的设计器变量。 /// </summary> private System.ComponentModel.Container components = null; private System.Windows.Forms.Button button2; private System.Windows.Forms.NumericUpDown numericUpDown1; private System.Windows.Forms.Label label1; private System.Windows.Forms.Label label2; private System.Windows.Forms.NumericUpDown numericUpDown2; private System.String StrFileName=""; public Form1() { // // Windows 窗体设计器支持所必需的 // InitializeComponent(); // // TODO: 在 InitializeComponent 调用后添加任何构造函数代码 // } /// <summary> /// 清理所有正在使用的资源。 /// </summary> protected override void Dispose( bool disposing ) { if( disposing ) { if (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.button1 = new System.Windows.Forms.Button(); this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog(); this.button2 = new System.Windows.Forms.Button(); this.numericUpDown1 = new System.Windows.Forms.NumericUpDown(); this.label1 = new System.Windows.Forms.Label(); this.label2 = new System.Windows.Forms.Label(); this.numericUpDown2 = new System.Windows.Forms.NumericUpDown(); ((System.ComponentModel.ISupportInitialize)(this.numericUpDown1)).BeginInit(); ((System.ComponentModel.ISupportInitialize)(this.numericUpDown2)).BeginInit(); this.SuspendLayout(); // // button1 // this.button1.Location = new System.Drawing.Point(24, 208); this.button1.Name = "button1"; this.button1.Size = new System.Drawing.Size(80, 23); this.button1.TabIndex = 0; this.button1.Text = "浏览图像"; this.button1.Click += new System.EventHandler(this.button1_Click); // // openFileDialog1 // this.openFileDialog1.Filter = "Image files (JPeg, Gif, Bmp, etc.)|*.jpg;*.jpeg;*.gif;*.bmp;*.tif; *.tiff; *.png|" + " JPeg files (*.jpg;*.jpeg)|*.jpg;*.jpeg |GIF files (*.gif)|*.gif |BMP files (*.b" + "mp)|*.bmp|Tiff files (*.tif;*.tiff)|*.tif;*.tiff|Png files (*.png)| *.png |All f" + "iles (*.*)|*.*"; // // button2 // this.button2.FlatStyle = System.Windows.Forms.FlatStyle.Popup; this.button2.Location = new System.Drawing.Point(8, 8); this.button2.Name = "button2"; this.button2.Size = new System.Drawing.Size(360, 192); this.button2.TabIndex = 1; this.button2.Paint += new System.Windows.Forms.PaintEventHandler(this.button2_Paint); // // numericUpDown1 // this.numericUpDown1.Location = new System.Drawing.Point(184, 208); this.numericUpDown1.Minimum = new System.Decimal(new int[] { 1, 0, 0, 0}); this.numericUpDown1.Name = "numericUpDown1"; this.numericUpDown1.Size = new System.Drawing.Size(40, 21); this.numericUpDown1.TabIndex = 2; this.numericUpDown1.Value = new System.Decimal(new int[] { 5, 0, 0, 0}); this.numericUpDown1.ValueChanged += new System.EventHandler(this.numericUpDown1_ValueChanged); // // label1 // this.label1.Location = new System.Drawing.Point(112, 212); this.label1.Name = "label1"; this.label1.Size = new System.Drawing.Size(72, 16); this.label1.TabIndex = 3; this.label1.Text = "X方向缩放:"; // // label2 // this.label2.Location = new System.Drawing.Point(232, 212); this.label2.Name = "label2"; this.label2.Size = new System.Drawing.Size(72, 16); this.label2.TabIndex = 5; this.label2.Text = "Y方向缩放:"; // // numericUpDown2 // this.numericUpDown2.Location = new System.Drawing.Point(304, 208); this.numericUpDown2.Minimum = new System.Decimal(new int[] { 1, 0, 0, 0}); this.numericUpDown2.Name = "numericUpDown2"; this.numericUpDown2.Size = new System.Drawing.Size(48, 21); this.numericUpDown2.TabIndex = 4; this.numericUpDown2.Value = new System.Decimal(new int[] { 5, 0, 0, 0}); this.numericUpDown2.ValueChanged += new System.EventHandler(this.numericUpDown2_ValueChanged); // // Form1 // this.AutoScaleBaseSize = new System.Drawing.Size(6, 14); this.ClientSize = new System.Drawing.Size(376, 238); this.Controls.Add(this.label2); this.Controls.Add(this.numericUpDown2); this.Controls.Add(this.label1); this.Controls.Add(this.numericUpDown1); this.Controls.Add(this.button2); this.Controls.Add(this.button1); this.MaximizeBox = false; this.Name = "Form1"; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "演示以任意比例缩放显示图像"; ((System.ComponentModel.ISupportInitialize)(this.numericUpDown1)).EndInit(); ((System.ComponentModel.ISupportInitialize)(this.numericUpDown2)).EndInit(); this.ResumeLayout(false); } #endregion /// <summary> /// 应用程序的主入口点。 /// </summary> [STAThread] static void Main() { Application.Run(new Form1()); } private void button1_Click(object sender, System.EventArgs e) {//浏览图像 this.openFileDialog1.ShowDialog(); this.StrFileName=this.openFileDialog1.FileName; this.button2.Refresh(); } private void button2_Paint(object sender, System.Windows.Forms.PaintEventArgs e) {//以任意比例缩放显示图像 if(this.StrFileName.Trim()=="") return; System.Drawing.Bitmap MyBitmap=new Bitmap(this.StrFileName); Graphics g = e.Graphics; TextureBrush MyBrush = new TextureBrush(MyBitmap); float fx=(float)(this.numericUpDown1.Value/10); float fy=(float)(this.numericUpDown2.Value/10); g.ScaleTransform(fx,fy); //MyBrush.ScaleTransform(fx,fy); g.FillRectangle(MyBrush,0,0,this.ClientRectangle.Width,this.ClientRectangle.Height); } private void numericUpDown1_ValueChanged(object sender, System.EventArgs e) {//更新图像显示 this.button2.Refresh(); } private void numericUpDown2_ValueChanged(object sender, System.EventArgs e) {//更新图像显示 this.button2.Refresh(); } }} 自己做的SQL SERVER数据导入导出等辅助功能工具 类 不可访问,因为它受保护级别限制 有关带多个参数的存储过程的实现 关于资源的释放 remoting 配置问题 急 求!Smart Client cs结构 网络运行实例。 C#连接数据库的问题,求达人解 c#的开方函数是什么啊 急啊 再线等 有没有像WSAD5那样的class <--> Database的代码自动生成工具 是不是采用NTFS文件系统,才可以装VS.Net呀? 请高手帮我看一下这条“语法错误”的语句是怎么回事?? 再请教??
工具箱里面有
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;namespace Image
{
/// <summary>
/// Form1 的摘要说明。
/// </summary>
public class Form1 : System.Windows.Forms.Form
{
private System.Windows.Forms.Button button1;
private System.Windows.Forms.OpenFileDialog openFileDialog1;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private System.ComponentModel.Container components = null;
private System.Windows.Forms.Button button2;
private System.Windows.Forms.NumericUpDown numericUpDown1;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.Label label2;
private System.Windows.Forms.NumericUpDown numericUpDown2;
private System.String StrFileName="";
public Form1()
{
//
// Windows 窗体设计器支持所必需的
//
InitializeComponent(); //
// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
//
} /// <summary>
/// 清理所有正在使用的资源。
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (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.button1 = new System.Windows.Forms.Button();
this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
this.button2 = new System.Windows.Forms.Button();
this.numericUpDown1 = new System.Windows.Forms.NumericUpDown();
this.label1 = new System.Windows.Forms.Label();
this.label2 = new System.Windows.Forms.Label();
this.numericUpDown2 = new System.Windows.Forms.NumericUpDown();
((System.ComponentModel.ISupportInitialize)(this.numericUpDown1)).BeginInit();
((System.ComponentModel.ISupportInitialize)(this.numericUpDown2)).BeginInit();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(24, 208);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(80, 23);
this.button1.TabIndex = 0;
this.button1.Text = "浏览图像";
this.button1.Click += new System.EventHandler(this.button1_Click);
//
// openFileDialog1
//
this.openFileDialog1.Filter = "Image files (JPeg, Gif, Bmp, etc.)|*.jpg;*.jpeg;*.gif;*.bmp;*.tif; *.tiff; *.png|" +
" JPeg files (*.jpg;*.jpeg)|*.jpg;*.jpeg |GIF files (*.gif)|*.gif |BMP files (*.b" +
"mp)|*.bmp|Tiff files (*.tif;*.tiff)|*.tif;*.tiff|Png files (*.png)| *.png |All f" +
"iles (*.*)|*.*";
//
// button2
//
this.button2.FlatStyle = System.Windows.Forms.FlatStyle.Popup;
this.button2.Location = new System.Drawing.Point(8, 8);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(360, 192);
this.button2.TabIndex = 1;
this.button2.Paint += new System.Windows.Forms.PaintEventHandler(this.button2_Paint);
//
// numericUpDown1
//
this.numericUpDown1.Location = new System.Drawing.Point(184, 208);
this.numericUpDown1.Minimum = new System.Decimal(new int[] {
1,
0,
0,
0});
this.numericUpDown1.Name = "numericUpDown1";
this.numericUpDown1.Size = new System.Drawing.Size(40, 21);
this.numericUpDown1.TabIndex = 2;
this.numericUpDown1.Value = new System.Decimal(new int[] {
5,
0,
0,
0});
this.numericUpDown1.ValueChanged += new System.EventHandler(this.numericUpDown1_ValueChanged);
//
// label1
//
this.label1.Location = new System.Drawing.Point(112, 212);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(72, 16);
this.label1.TabIndex = 3;
this.label1.Text = "X方向缩放:";
//
// label2
//
this.label2.Location = new System.Drawing.Point(232, 212);
this.label2.Name = "label2";
this.label2.Size = new System.Drawing.Size(72, 16);
this.label2.TabIndex = 5;
this.label2.Text = "Y方向缩放:";
//
// numericUpDown2
//
this.numericUpDown2.Location = new System.Drawing.Point(304, 208);
this.numericUpDown2.Minimum = new System.Decimal(new int[] {
1,
0,
0,
0});
this.numericUpDown2.Name = "numericUpDown2";
this.numericUpDown2.Size = new System.Drawing.Size(48, 21);
this.numericUpDown2.TabIndex = 4;
this.numericUpDown2.Value = new System.Decimal(new int[] {
5,
0,
0,
0});
this.numericUpDown2.ValueChanged += new System.EventHandler(this.numericUpDown2_ValueChanged);
//
// Form1
//
this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
this.ClientSize = new System.Drawing.Size(376, 238);
this.Controls.Add(this.label2);
this.Controls.Add(this.numericUpDown2);
this.Controls.Add(this.label1);
this.Controls.Add(this.numericUpDown1);
this.Controls.Add(this.button2);
this.Controls.Add(this.button1);
this.MaximizeBox = false;
this.Name = "Form1";
this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
this.Text = "演示以任意比例缩放显示图像";
((System.ComponentModel.ISupportInitialize)(this.numericUpDown1)).EndInit();
((System.ComponentModel.ISupportInitialize)(this.numericUpDown2)).EndInit();
this.ResumeLayout(false); }
#endregion /// <summary>
/// 应用程序的主入口点。
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new Form1());
}
private void button1_Click(object sender, System.EventArgs e)
{//浏览图像
this.openFileDialog1.ShowDialog();
this.StrFileName=this.openFileDialog1.FileName;
this.button2.Refresh();
}
private void button2_Paint(object sender, System.Windows.Forms.PaintEventArgs e)
{//以任意比例缩放显示图像
if(this.StrFileName.Trim()=="")
return;
System.Drawing.Bitmap MyBitmap=new Bitmap(this.StrFileName);
Graphics g = e.Graphics;
TextureBrush MyBrush = new TextureBrush(MyBitmap);
float fx=(float)(this.numericUpDown1.Value/10);
float fy=(float)(this.numericUpDown2.Value/10);
g.ScaleTransform(fx,fy);
//MyBrush.ScaleTransform(fx,fy);
g.FillRectangle(MyBrush,0,0,this.ClientRectangle.Width,this.ClientRectangle.Height);
} private void numericUpDown1_ValueChanged(object sender, System.EventArgs e)
{//更新图像显示
this.button2.Refresh();
} private void numericUpDown2_ValueChanged(object sender, System.EventArgs e)
{//更新图像显示
this.button2.Refresh();
}
}
}