| 发表于：2007-01-10 08:35:23 楼主 |
using system;
using system.drawing;
using system.collections;
using system.componentmodel;
using system.windows.forms;
using system.data;
namespace hashtable
{
/// <summary>
/// form1 的摘要说明。
/// </summary>
public class form1 : system.windows.forms.form
{
private hashtable _hashtable=new hashtable（);
private system.windows.forms.groupbox groupbox1;
private system.windows.forms.label label1;
private system.windows.forms.label label2;
private system.windows.forms.label label3;
private system.windows.forms.label label4;
private system.windows.forms.textbox txtkey;
private system.windows.forms.textbox txtvalue;
private system.windows.forms.button btnadd;
private system.windows.forms.listbox lstaddedkey;
private system.windows.forms.textbox txtselectedvalue;
/// <summary>
/// 必需的设计器变量。
/// </summary>
private system.componentmodel.container components = null;
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.groupbox1 = new system.windows.forms.groupbox（);
this.btnadd = new system.windows.forms.button（);
this.txtvalue = new system.windows.forms.textbox（);
this.txtkey = new system.windows.forms.textbox（);
this.label2 = new system.windows.forms.label（);
this.label1 = new system.windows.forms.label（);
this.label3 = new system.windows.forms.label（);
this.lstaddedkey = new system.windows.forms.listbox（);
this.label4 = new system.windows.forms.label（);
this.txtselectedvalue = new system.windows.forms.textbox（);
this.groupbox1.suspendlayout（);
this.suspendlayout（);
//
// groupbox1
//
this.groupbox1.controls.add（this.btnadd);
this.groupbox1.controls.add（this.txtvalue);
this.groupbox1.controls.add（this.txtkey);
this.groupbox1.controls.add（this.label2);
this.groupbox1.controls.add（this.label1);
this.groupbox1.location = new system.drawing.point（8, 8);
this.groupbox1.name = "groupbox1 ";
this.groupbox1.size = new system.drawing.size（280, 120);
this.groupbox1.tabindex = 0;
this.groupbox1.tabstop = false;
this.groupbox1.text = "建立键值 ";
//
// btnadd
//
this.btnadd.location = new system.drawing.point（96, 88);
this.btnadd.name = "btnadd ";
this.btnadd.tabindex = 4;
this.btnadd.text = "添加 ";
this.btnadd.click += new system.eventhandler（this.btnadd_click);
//
// txtvalue
//
this.txtvalue.location = new system.drawing.point（96, 56);
this.txtvalue.name = "txtvalue ";
this.txtvalue.size = new system.drawing.size（176, 21);
this.txtvalue.tabindex = 3;
this.txtvalue.text = " ";
//
// txtkey
//
this.txtkey.location = new system.drawing.point（96, 24);
this.txtkey.name = "txtkey ";
this.txtkey.size = new system.drawing.size（176, 21);
this.txtkey.tabindex = 2;
this.txtkey.text = " ";
//
// label2
//
this.label2.autosize = true;
this.label2.location = new system.drawing.point（16, 56);
this.label2.name = "label2 ";
this.label2.size = new system.drawing.size（29, 17);
this.label2.tabindex = 1;
this.label2.text = "值： ";
//
// label1
//
this.label1.autosize = true;
this.label1.location = new system.drawing.point（16, 24);
this.label1.name = "label1 ";
this.label1.size = new system.drawing.size（29, 17);
this.label1.tabindex = 0;
this.label1.text = "键： ";
//
// label3
//
this.label3.autosize = true;
this.label3.location = new system.drawing.point（8, 136);
this.label3.name = "label3 ";
this.label3.size = new system.drawing.size（72, 17);
this.label3.tabindex = 1;
this.label3.text = "已经添加值: ";
//
// lstaddedkey
//
this.lstaddedkey.itemheight = 12;
this.lstaddedkey.location = new system.drawing.point（96, 136);
this.lstaddedkey.name = "lstaddedkey ";
this.lstaddedkey.size = new system.drawing.size（192, 112);
this.lstaddedkey.tabindex = 2;
this.lstaddedkey.selectedvaluechanged += new system.eventhandler（this.lstaddedkey_selectedvaluechanged);
this.lstaddedkey.selectedindexchanged += new system.eventhandler（this.lstaddedkey_selectedindexchanged);
//
// label4
//
this.label4.autosize = true;
this.label4.location = new system.drawing.point（16, 264);
this.label4.name = "label4 ";
this.label4.size = new system.drawing.size（60, 17);
this.label4.tabindex = 3;
this.label4.text = "选中的值: ";
//
// txtselectedvalue
//
this.txtselectedvalue.location = new system.drawing.point（96, 256);
this.txtselectedvalue.name = "txtselectedvalue ";
this.txtselectedvalue.size = new system.drawing.size（192, 21);
this.txtselectedvalue.tabindex = 4;
this.txtselectedvalue.text = " ";
//
// form1
//
this.autoscalebasesize = new system.drawing.size（6, 14);
this.clientsize = new system.drawing.size（292, 293);
this.controls.add（this.txtselectedvalue);
this.controls.add（this.label4);
this.controls.add（this.lstaddedkey);
this.controls.add（this.label3);
this.controls.add（this.groupbox1);
this.name = "form1 ";
this.text = "hashtableexam ";
this.load += new system.eventhandler（this.form1_load);
this.groupbox1.resumelayout（false);
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 form1_load（object sender, system.eventargs e)
{
}
private void btnadd_click（object sender, system.eventargs e)
{
try
{
_hashtable.add（txtkey.text,txtvalue.text);
}
catch（argumentexception)
{
messagebox.show（ "不能添加重负的值 ", "错误 ",system.windows.forms.messageboxbuttons.ok,
system.windows.forms.messageboxicon.information);
//有重复的键值给用户提示，插入动作终止
return;
}
catch（exception)
{
messagebox.show（ "产生系统错误 ");//产生未知错误
application.exit（);//则关闭应用程序
}
lstaddedkey.items.add（txtkey.text);
//txtkey.text= " ";
//txtvalue.text= " ";
}
private void lstaddedkey_selectedindexchanged（object sender, system.eventargs e)
{
}
private void lstaddedkey_selectedvaluechanged（object sender, system.eventargs e)
{
string selectedkey=lstaddedkey.selectedvalue.tostring（);
string selectedvalue=（string)_hashtable[selectedkey];
txtselectedvalue.text=selectedvalue;
}
}
}
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