成品直播源码，实例源码系列-更改图片透明度

partial class Form1<br>{<br>    /// <summary><br>    /// 必需的设计器变量。<br>    /// </summary><br>    private System.ComponentModel.IContainer components = null;<br>    /// <summary><br>    /// 清理所有正在使用的资源。<br>    /// </summary><br>    /// <param name="disposing">如果应释放托管资源，为 true；否则为 false。</param><br>    protected override void Dispose(bool disposing)<br>    {<br>        if (disposing && (components != null))<br>        {<br>            components.Dispose();<br>        }<br>        base.Dispose(disposing);<br>    }<br>    #region Windows 窗体设计器生成的代码<br>    /// <summary><br>    /// 设计器支持所需的方法 - 不要<br>    /// 使用代码编辑器修改此方法的内容。<br>    /// </summary><br>    private void InitializeComponent()<br>    {<br>        this.pictureBox1 = new System.Windows.Forms.PictureBox();<br>        this.trackBar1 = new System.Windows.Forms.TrackBar();<br>        this.button1 = new System.Windows.Forms.Button();<br>        this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();<br>        ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();<br>        ((System.ComponentModel.ISupportInitialize)(this.trackBar1)).BeginInit();<br>        this.SuspendLayout();<br>        // <br>        // pictureBox1<br>        // <br>        this.pictureBox1.Location = new System.Drawing.Point(12, 80);<br>        this.pictureBox1.Name = "pictureBox1";<br>        this.pictureBox1.Size = new System.Drawing.Size(424, 258);<br>        this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;<br>        this.pictureBox1.TabIndex = 0;<br>        this.pictureBox1.TabStop = false;<br>        // <br>        // trackBar1<br>        // <br>        this.trackBar1.Location = new System.Drawing.Point(12, 41);<br>        this.trackBar1.Maximum = 100;<br>        this.trackBar1.Minimum = 1;<br>        this.trackBar1.Name = "trackBar1";<br>        this.trackBar1.Size = new System.Drawing.Size(424, 45);<br>        this.trackBar1.TabIndex = 1;<br>        this.trackBar1.TickStyle = System.Windows.Forms.TickStyle.None;<br>        this.trackBar1.Value = 100;<br>        this.trackBar1.ValueChanged += new System.EventHandler(this.trackBar1_ValueChanged);<br>        // <br>        // button1<br>        // <br>        this.button1.Location = new System.Drawing.Point(12, 12);<br>        this.button1.Name = "button1";<br>        this.button1.Size = new System.Drawing.Size(75, 23);<br>        this.button1.TabIndex = 2;<br>        this.button1.Text = "打开图片";<br>        this.button1.UseVisualStyleBackColor = true;<br>        this.button1.Click += new System.EventHandler(this.button1_Click);<br>        // <br>        // openFileDialog1<br>        // <br>        this.openFileDialog1.Filter = "图片文件|*.jpg;*.jpeg;*.png;*.bmp";<br>        // <br>        // Form1<br>        // <br>        this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);<br>        this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;<br>        this.ClientSize = new System.Drawing.Size(447, 350);<br>        this.Controls.Add(this.pictureBox1);<br>        this.Controls.Add(this.button1);<br>        this.Controls.Add(this.trackBar1);<br>        this.Name = "Form1";<br>        this.Text = "Form1";<br>        this.Load += new System.EventHandler(this.Form1_Load);<br>        ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();<br>        ((System.ComponentModel.ISupportInitialize)(this.trackBar1)).EndInit();<br>        this.ResumeLayout(false);<br>        this.PerformLayout();<br>    }<br>    #endregion<br>    private System.Windows.Forms.PictureBox pictureBox1;<br>    private System.Windows.Forms.TrackBar trackBar1;<br>    private System.Windows.Forms.Button button1;<br>    private System.Windows.Forms.OpenFileDialog openFileDialog1;<br>}

以上就是成品直播源码，实例源码系列-更改图片透明度，更多内容欢迎关注之后的文章