页面控件内容向Model对象赋值

上篇文章写的是 Model对象中的值向页面控件赋值.

本篇文章则与之相反,页面控件中的向Model对象赋值.

不多说......code!

cs代码:

    protected void Button1_Click(object sender, EventArgs e)
    {
        TestModel model2 = new TestModel();
        SetControlToModel(model2);
        Response.Write("userid:"+model2.Userid);
        Response.Write("</br>");
        Response.Write("Username:" + model2.Username);
        Response.Write("</br>");
        Response.Write("Userpwd:" + model2.Userpwd);
    }

逻辑代码:

 ///<summary>
/// 需要赋值的Model对象
///</summary>
///<param name="model"></param>
///<returns></returns>
    public object  SetControlToModel(object model)
    {
        return SetControlToModel(model, this);
    }

核心代码:

  ///<summary>
    /// 向Model赋值
    ///</summary>
    ///<param name="model">Model对象</param>
    ///<param name="ParentControl">页面控件 page,Panel 等控件</param>
    ///<returns></returns>
    private object SetControlToModel(object model, Control ParentControl)
    {
        if (model == null) return null;
        Type t = model.GetType();
        PropertyInfo[] info = t.GetProperties();
        foreach (PropertyInfo p in info)  //得到Model中的属性
        {
            Control c;
            Type type;
            c = this.checkControl(p.Name, ParentControl); //检查控件是否存在
            if (c != null)
            {
                type = c.GetType();
                if (type.Equals(typeof(TextBox)))
                {
                    SetValue(model, p, ((TextBox)c).Text.Trim());
                }
                if (type.Equals(typeof(DropDownList)))
                {
                    SetValue(model, p, ((DropDownList)c).Text.Trim());
                }     
            }
        }
        return model;  
    }

    private void SetValue(object model,PropertyInfo info,object value)
    {
        if (value == DBNull.Value || value == null)
        {
            info.SetValue(model, null, null);
        }
        else
        {
            info.SetValue(model, Convert.ChangeType(value, GetPropertyType(info)), null);
        }
    }
    ///<summary>
    /// 获得类型的真正类型
    ///</summary>
    ///<param name="propertyType"></param>
    ///<returns></returns>
    private Type GetPropertyType(PropertyInfo p)
    {
        Type propertyType = p.PropertyType;
        if (propertyType.IsGenericType && propertyType.GetGenericTypeDefinition() == typeof(Nullable<>))
        {
            propertyType = propertyType.GetGenericArguments()[0];
        }
        return propertyType;
    }

完成!!!

看显示效果

点击 按钮后,成功输出:

最后,代码很多地方没有进行数据校验,提供方法及思路,自己完善吧!

源码地址:https://files.cnblogs.com/xyong/Demo_BindControl2.zip