关于属性，我怎么才能在一个方法运行后得到的值能在另一个方法里使用呢

[curd0468]

public class T_ImageId2
{
public int t_ImageId = 0;
public int T_ImageId
{
get
{
return this.t_ImageId;
}
set
{
this.t_ImageId = value;
}
}
}
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
T_ImageId2 gt = new T_ImageId2();
gt.t_ImageId = 2;
}
}
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
T_ImageId2 gt2 = new T_ImageId2();
Response.Write(gt2.T_ImageId.ToString());
}

为什么我点击ImageButton1得到的结果是0，而不是2呢，我要怎么才能让点击的结果为2呢，请高人指教下，感激不尽。

[curd0468]

没有一个是可以的，不过一水寒老兄给了我另外一个解决问题的方法，就是把值先存到Cookies里，呵呵，谢谢各位，结贴了

[patrickpan]

gt和gt2是两个实例，之间没有关系的。
这样可以达到你要的效果。
[Code=C#]
T_ImageId2 gt = new T_ImageId2();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
gt.t_ImageId = 2;
}
}
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
//T_ImageId2 gt2 = new T_ImageId2();
Response.Write(gt.T_ImageId.ToString());
}
[/Code]

[starts_2000]

public class T_ImageId2 
{ 
    public int t_ImageId = 0; 
    public int T_ImageId 
    { 
        get 
        { 
            return this.t_ImageId; 
        } 
        set  
        { 
            this.t_ImageId = value; 
        } 
    } 
} 

T_ImageId2 gt = new T_ImageId2(); //要定义为全局变量
protected void Page_Load(object sender, EventArgs e) 
    { 
        if (!IsPostBack) 
        { 
             gt.t_ImageId = 2; 
        } 
    } 
protected void ImageButton1_Click(object sender, ImageClickEventArgs e) 
    { 
        Response.Write(gt.T_ImageId.ToString()); 
    } 

[ericzhangbo1982111]

public class T_ImageId2
{
public int t_ImageId = 0;
public int T_ImageId
{
get
{
return this.t_ImageId;
}
set
{
this.t_ImageId = value;
}
}
}
T_ImageId2 gt =null;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
gt = new T_ImageId2();
gt.t_ImageId = 2;
}
}
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
if(gt!=null)
Response.Write(gt2.T_ImageId.ToString());
}

[curd0468]

不行啊两位老大，你们试下，还是0呀

[XIEWH]

t_ImageId 应该声明为private吧,要不用属性还有什么意义?直接就可以改t_ImageId的值了

[patrickpan]

[Code=C#]
T_ImageId2 gt = new T_ImageId2();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
gt.T_ImageId = 2; //这里t_ImageId改为T_ImageId
}
}
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
//T_ImageId2 gt2 = new T_ImageId2();
Response.Write(gt.T_ImageId.ToString());
}

[/Code]

[patrickpan]

t_ImageId 最好声明为private吧
否则t_ImageId，T_ImageId都可以访问，容易混淆。

[yunfeng007]

你在asp.net下要想使用的话，不能这样用的，因asp.net基于http协议，为无状态的，你要把结果保存到session中才行
[Serializable]
public class T_ImageId2
{
private int t_ImageId = 0;
public int T_ImageId
{
get
{
return this.t_ImageId;
}
set
{
this.t_ImageId = value;
}
}
}
T_ImageId2 gt =null;

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{ if(Session["gt"]==null)
{
gt = new T_ImageId2();
gt.t_ImageId = 2;
Session["gt"]=gt;
}
}
}
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
if(Session["gt"]!=null)
{
gt = (gt)Session["gt"];
Response.Write(gt.T_ImageId.ToString());
}
}

[XIEWH]

static T_ImageId2 gt =null;
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
gt = new T_ImageId2();
gt.t_ImageId = 2;
}
}
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
if(gt!=null)
Response.Write(gt2.T_ImageId.ToString());
}

[Choi57671452]

public class T_ImageId2
{
    public T_ImageId2(){}

    public int T_ImageId{get; set;}
}

T_ImageId2 gt;
protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
             gt = new T_ImageId2();
             gt.T_ImageId = 2;
        }
    }
protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        Response.Write(gt.T_ImageId.ToString());
    }

[mikebai]

好好看下对象的作用域。
函数体内定义的对象，只在当前函数内有效。然后就回收了