1、类库项目引用System.Windows.Forms并添加引用后，才可创建窗体。
2、控制台应用程序调用中间库（DLL）中的方法创建窗体；中间类库使用反射下的Assembly加载包含窗体的类库及创建实例。
注意：1）创建实例时，参数为窗体类的全名（命名空间+类名）。
2）返回值是Object类型，需转化为Form类型。
3）exe(控制台程序)、中间类库（dll）、窗体所在类库（dll）在同一目录下。
4）Load（空间名，窗体类全名），LoadFrom（*.dll,窗体类全名）
具体代码如下：
窗体类库：
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms; namespace TestForm
{
public partial class Test : Form
{
public Test()
{
InitializeComponent();
}
}
}
中间类库：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms; namespace Anxin.Factory
{
public class FormFactory
{
/// <summary>
/// 创建窗体
/// </summary>
/// <param name="val_classFullName"></param>
/// <returns></returns>
public static Form CreateForm(string val_classFullName)
{
string nameSpace = val_classFullName.Substring(0,val_classFullName.LastIndexOf('.'));
return (Form)Assembly.Load(nameSpace).CreateInstance(val_classFullName);
} /// <summary>
/// 创建窗体
/// </summary>
/// <param name="val_nameSpace">命名空间</param>
/// <param name="val_className">窗体类名</param>
/// <returns></returns>
public static Form CreateForm(string val_nameSpace, string val_className)
{
//string className = val_className; //仅使用类名创建示例失败。
string classFullName = string.Format("{0}.{1}",val_nameSpace,val_className);
//MessageBox.Show(Assembly.GetExecutingAssembly().Location);
return (Form)Assembly.Load(val_nameSpace).CreateInstance(classFullName);
} public static Form CreateForm(string val_formAssemblyFile, string val_formFullName, Object[] val_formArgs)
{
return CreateForm(val_formAssemblyFile, val_formFullName, val_formArgs, null);
} public static Form CreateForm(string val_formAssemblyFile,string val_formFullName,Object[] val_formArgs,string val_formText)
{
Form form;
string assemblyPath = System.IO.Path.GetDirectoryName(System.Reflection.Assembly.GetExecutingAssembly().Location);
string assemblyFullName = assemblyPath + val_formAssemblyFile;
if (!assemblyPath.EndsWith("\\"))
{
assemblyFullName = assemblyPath + "\\" + val_formAssemblyFile;
}
//MessageBox.Show(assemblyFullName);
Assembly formAssembly = Assembly.LoadFrom(assemblyFullName);
form = formAssembly.CreateInstance(val_formFullName) as Form;
if(null == form)
{
string strError = string.Format("创建窗体失败!\n程序集{0}\n窗体类名称{1}",
val_formAssemblyFile,
val_formFullName);
if (!string.IsNullOrEmpty(val_formText))
{
strError += "窗体标题" + val_formText;
}
throw new Exception(strError);
} if (!string.IsNullOrEmpty(val_formText))
{
form.Text = val_formText;
} return form;
}
}
}
控制台程序：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Anxin.Factory;
using System.Windows.Forms; namespace TestFactory
{
class Program
{
static void Main(string[] args)
{
string nameSpace = "TestForm";
string className = "Test"; //窗体类名
//string className = "Example"; //窗体文件名 （报错）
Form testForm = FormFactory.CreateForm(nameSpace,className); string classFullName = nameSpace + "." + className;
testForm = FormFactory.CreateForm(classFullName); string dllName = "TestForm.dll";
//string classFullName = "TestForm.Test";
testForm = FormFactory.CreateForm(dllName,classFullName,null); string formText = "OK 加油！";
testForm = FormFactory.CreateForm(dllName, classFullName, null,formText); if (null != testForm)
{
testForm.ShowDialog();
}
else
{
Console.WriteLine("通过调用Dll,创建窗体失败！\n");
//使用窗体文件名创建时失败！
}
}
}
}