首先，这是我在stackoverflow的第一篇文章。我经常使用这一面，我几乎找到了我需要的一切。
现在到我的问题。我搜索了这个问题，但我并没有真正找到任何东西。我想编写一个应用程序，我可以在其中单击一个按钮并制作一个人的照片并将该照片与数据库中的用户链接。是否可以使用 WIA 控制相机？我需要一个特殊的相机吗？
如果有人可以为 WIA 的一般用途发布一个好的教程，我将不胜感激。
问问题
11441 次
4 回答
7
C# 中的 WIA 相机测试示例。花了我一整个晚上！
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 WIA;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
this.button1.Text = "Select Camera";
this.label1.Text = "[ no camera selected ]";
}
private void Form1_Load(object sender, EventArgs e) { }
private String _label = null;
private void button1_Click_1(object sender, EventArgs e)
{
try
{
// create a new WIA common dialog box for the user to select a device from
WIA.CommonDialog dlg = new WIA.CommonDialog();
// show user the WIA device dialog
Device d = dlg.ShowSelectDevice(WiaDeviceType.CameraDeviceType, true, false);
// check if a device was selected
if (d != null)
{
// Print camera properties
richTextBox1.AppendText("\n\n Print properties:\n");
foreach (Property p in d.Properties)
{
richTextBox1.AppendText(p.Name + ": " + p.get_Value() + " ("+ p.PropertyID + ":" + p.IsReadOnly + ") \n");
// Update UI
if (p.PropertyID == 3) _label = (String) p.get_Value();
if (p.PropertyID == 4) _label = _label + " - " + p.get_Value();
this.label1.Text = _label;
}
// Print commands
richTextBox1.AppendText("\n\n Print commands:\n");
foreach (DeviceCommand dvc in d.Commands)
{
richTextBox1.AppendText(dvc.Name + ": " + dvc.Description + " ("+ dvc.CommandID +") \n");
}
// Print events
richTextBox1.AppendText("\n\n Print events:\n");
foreach (DeviceEvent dve in d.Events)
{
richTextBox1.AppendText(dve.Name + ": " + dve.Description + " (" + dve.Type + ") \n");
}
// Print item properties
richTextBox1.AppendText("\n\n Print item properties:\n");
foreach (Property item in d.Items[1].Properties)
{
richTextBox1.AppendText(item.IsReadOnly + ": " + item.Name + " (" + item.PropertyID + ") \n");
}
foreach (WIA.Property p in d.Properties)
{
Object tempNewProperty;
// change Exposure Compensation: value 0 to 2 (ID 2053, isReadonly False)
if (p.PropertyID == 2053)
{
tempNewProperty = (int) -2000; // can not be set to minus values, why???
((IProperty)p).set_Value(ref tempNewProperty);
richTextBox1.AppendText(">>>>" + p.get_Value());
}
}
// Now let's take a picture !
d.ExecuteCommand(CommandID.wiaCommandTakePicture);
richTextBox1.AppendText(".");
}
else
{
d = null;
richTextBox1.AppendText("Result: no device selected or device could not be read. ");
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "WIA Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
}
namespace WindowsFormsApplication1
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null;
/// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.button1 = new System.Windows.Forms.Button();
this.label1 = new System.Windows.Forms.Label();
this.richTextBox1 = new System.Windows.Forms.RichTextBox();
this.button2 = new System.Windows.Forms.Button();
this.SuspendLayout();
//
// button1
//
this.button1.Location = new System.Drawing.Point(12, 12);
this.button1.Name = "button1";
this.button1.Size = new System.Drawing.Size(137, 23);
this.button1.TabIndex = 0;
this.button1.Text = "button1";
this.button1.UseVisualStyleBackColor = true;
this.button1.Click += new System.EventHandler(this.button1_Click_1);
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(9, 44);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(35, 13);
this.label1.TabIndex = 1;
this.label1.Text = "label1";
//
// richTextBox1
//
this.richTextBox1.Location = new System.Drawing.Point(12, 60);
this.richTextBox1.Name = "richTextBox1";
this.richTextBox1.Size = new System.Drawing.Size(946, 445);
this.richTextBox1.TabIndex = 2;
this.richTextBox1.Text = "";
//
// button2
//
this.button2.Location = new System.Drawing.Point(156, 11);
this.button2.Name = "button2";
this.button2.Size = new System.Drawing.Size(173, 23);
this.button2.TabIndex = 3;
this.button2.Text = "button2";
this.button2.UseVisualStyleBackColor = true;
this.button2.Click += new System.EventHandler(this.button2_Click_1);
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(970, 517);
this.Controls.Add(this.button2);
this.Controls.Add(this.richTextBox1);
this.Controls.Add(this.label1);
this.Controls.Add(this.button1);
this.Name = "Form1";
this.Text = "Form1";
this.Load += new System.EventHandler(this.Form1_Load);
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
private System.Windows.Forms.Button button1;
private System.Windows.Forms.Label label1;
private System.Windows.Forms.RichTextBox richTextBox1;
private System.Windows.Forms.Button button2;
}
}
于 2012-08-07T04:00:51.973 回答
1
看起来微软在这里提供了一个教程。
我认为您会对从流式视频中捕获静止图像部分特别感兴趣。
于 2011-12-12T15:20:55.130 回答
0
我去过那里，我已经做到了。您需要具有 WIA 驱动程序的相机。有几个这样做。这并不容易，但可以肯定地做到。
于 2011-12-12T15:23:04.803 回答
-1
至于 WIA C# 包装器，我在 Codeplex 上遇到了ScanWIA。它没有大量的文档。但是，阅读源代码可能会有所帮助。此外，该项目有一个演示项目，您可以定制该项目以从相机获取图片。
于 2016-08-03T15:31:43.587 回答