using System;
using System.Collections.Generic;
using System.Web.UI;
using System.Web.UI.WebControls;
using NewLife.Reflection;
using NewLife.Web;
using XCode.Common;
using XCode.Configuration;
namespace XCode.Accessors
{
/// <summary>WebForm实体访问器</summary>
public class WebFormEntityAccessor : EntityAccessorBase
{
#region 属性
/// <summary>种类</summary>
public override EntityAccessorTypes Kind { get { return EntityAccessorTypes.WebForm; } }
private Control _Container;
/// <summary>页面</summary>
public Control Container
{
get { return _Container; }
private set { _Container = value; }
}
private Int64 _MaxLength = 10 * 1024 * 1024;
/// <summary>最大文件大小，默认10M</summary>
public Int64 MaxLength
{
get { return _MaxLength; }
set { _MaxLength = value; }
}
private String _ItemPrefix = "frm";
/// <summary>前缀</summary>
public String ItemPrefix
{
get { return _ItemPrefix; }
set { _ItemPrefix = value; }
}
#endregion
#region 设置
/// <summary>设置参数。返回自身，方便链式写法。</summary>
/// <param name="name">参数名</param>
/// <param name="value">参数值</param>
/// <returns></returns>
public override IEntityAccessor SetConfig(string name, object value)
{
if (name.EqualIgnoreCase(EntityAccessorOptions.Container))
Container = value as Control;
else if (name.EqualIgnoreCase(EntityAccessorOptions.MaxLength))
MaxLength = (Int64)value;
else if (name.EqualIgnoreCase(EntityAccessorOptions.ItemPrefix))
ItemPrefix = (String)value;
return base.SetConfig(name, value);
}
#endregion
#region 读取
/// <summary>外部=>实体，从外部读取指定实体字段的信息</summary>
/// <param name="entity">实体对象</param>
/// <param name="item">实体字段</param>
protected override void ReadItem(IEntity entity, FieldItem item)
{
Control control = FindControlByField(item);
if (control == null) return;
//try
//{
GetFormItem(entity, item, control);
//}
//catch (Exception ex)
//{
// throw new XCodeException("读取" + item.Name + "的数据时出错！" + ex.Message, ex);
//}
}
/// <summary>把控件的值设置到实体属性上</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
protected virtual void GetFormItem(IEntity entity, FieldItem field, Control control)
{
if (field == null || control == null) return;
if (control is WebControl)
{
var wc = control as WebControl;
// 分控件处理
if (wc is TextBox)
GetFormItemTextBox(entity, field, wc as TextBox);
else if (wc is Label)
GetFormItemLabel(entity, field, wc as Label);
else if (wc is RadioButton)
GetFormItemRadioButton(entity, field, wc as RadioButton);
else if (wc is CheckBox)
GetFormItemCheckBox(entity, field, wc as CheckBox);
else if (wc is ListControl)
GetFormItemListControl(entity, field, wc as ListControl);
// 不处理文件上传
else if (wc is FileUpload)
return;
else
{
Object v = null;
if (GetControlValue(control, out v) && !Object.Equals(entity[field.Name], v)) SetEntityItem(entity, field, v);
}
}
else
{
Object v = null;
if (GetControlValue(control, out v) && !Object.Equals(entity[field.Name], v)) SetEntityItem(entity, field, v);
}
}
private void SetEntityItem(IEntity entity, FieldItem field, Object value)
{
// 先转为目标类型
value = TypeX.ChangeType(value, field.Type);
// 如果是字符串，并且为空，则让它等于实体里面的值，避免影响脏数据
if (field.Type == typeof(String) && String.IsNullOrEmpty((String)value) && String.IsNullOrEmpty((String)entity[field.Name])) value = entity[field.Name];
entity.SetItem(field.Name, value);
}
/// <summary>文本框</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
protected virtual void GetFormItemTextBox(IEntity entity, FieldItem field, TextBox control)
{
//String v = control.Text;
//if (!Object.Equals(entity[field.Name], v)) SetEntityItem(field, v);
Object v = null;
if (!GetControlValue(control, out v)) v = control.Text;
if (!Object.Equals(entity[field.Name], v))
{
// 如果是密码输入框，并且为空，不需要设置
if (!String.IsNullOrEmpty("" + v) || control.TextMode != TextBoxMode.Password) SetEntityItem(entity, field, v);
}
}
/// <summary>标签，不做任何操作</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
protected virtual void GetFormItemLabel(IEntity entity, FieldItem field, Label control)
{
}
/// <summary>复选框</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
protected virtual void GetFormItemCheckBox(IEntity entity, FieldItem field, CheckBox control)
{
Type type = field.Type;
Object v;
if (type == typeof(Boolean))
v = control.Checked;
else if (type == typeof(Int32))
v = control.Checked ? 1 : 0;
else
v = control.Checked;
if (!Object.Equals(entity[field.Name], v)) SetEntityItem(entity, field, v);
}
/// <summary>列表框</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
protected virtual void GetFormItemListControl(IEntity entity, FieldItem field, ListControl control)
{
//if (String.IsNullOrEmpty(control.SelectedValue)) return;
String v = control.SelectedValue;
if (!Object.Equals(entity[field.Name], v)) SetEntityItem(entity, field, v);
}
/// <summary>单选框</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
protected virtual void GetFormItemRadioButton(IEntity entity, FieldItem field, RadioButton control)
{
List<RadioButton> list = new List<RadioButton>();
// 找到同一级同组名的所有单选
foreach (Control item in control.Parent.Controls)
{
if (!(item is RadioButton)) continue;
RadioButton rb = item as RadioButton;
if (rb.GroupName != control.GroupName) continue;
list.Add(rb);
}
if (list.Count < 1) return;
// 特殊处理数字
if (field.Type == typeof(Int32))
{
Int32 id = -1;
for (int i = 0; i < list.Count; i++)
{
if (list[i].Checked)
{
id = i;
break;
}
}
if (id >= 0 && !Object.Equals(entity[field.Name], id)) SetEntityItem(entity, field, id);
}
else
{
foreach (RadioButton item in list)
{
if (item.Checked)
{
if (!Object.Equals(entity[field.Name], item.Text))
{
SetEntityItem(entity, field, item.Text);
break;
}
}
}
}
}
#endregion
#region 写入
/// <summary>实体=>外部，把指定实体字段的信息写入到外部</summary>
/// <param name="entity">实体对象</param>
/// <param name="item">实体字段</param>
protected override void WriteItem(IEntity entity, FieldItem item)
{
Control control = FindControlByField(item);
if (control == null) return;
Boolean canSave = true;
//try
//{
SetFormItem(entity, item, control, canSave);
//}
//catch (Exception ex)
//{
// throw new XCodeException("设置" + item.Name + "的数据时出错！" + ex.Message, ex);
//}
}
/// <summary>设置控件的ToolTip提示信息</summary>
/// <param name="field"></param>
/// <param name="control"></param>
protected virtual void SetToolTip(FieldItem field, Control control)
{
if (field == null || control == null) return;
String toolTip = field.DisplayName;
if (field.IsNullable)
toolTip = String.Format("请填写{0}！", toolTip);
else
toolTip = String.Format("必须填写{0}！", toolTip);
//if (control is Label) toolTip = null;
if (control is Label) return;
if (control is WebControl)
{
var wc = control as WebControl;
// 设置ToolTip
if (String.IsNullOrEmpty(wc.ToolTip) && !String.IsNullOrEmpty(toolTip)) wc.ToolTip = toolTip;
}
else
{
var pix = PropertyInfoX.Create(control.GetType(), "ToolTip");
if (pix != null && String.IsNullOrEmpty((String)pix.GetValue(control)))
{
pix.SetValue(control, toolTip);
}
}
}
/// <summary>把实体成员的值设置到控件上</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
/// <param name="canSave"></param>
protected virtual void SetFormItem(IEntity entity, FieldItem field, Control control, Boolean canSave)
{
if (field == null || control == null) return;
if (control is WebControl)
{
var wc = control as WebControl;
//// 必填项
//if (!field.IsNullable) SetNotAllowNull(field, control, canSave);
// 设置只读，只有不能保存时才设置，因为一般都不是只读，而前端可能自己设置了控件为只读，这种情况下这里再设置就会修改前端的意思
if (!canSave)
{
if (wc is TextBox)
(wc as TextBox).ReadOnly = !canSave;
else
wc.Enabled = canSave;
}
// 分控件处理
if (wc is TextBox)
SetFormItemTextBox(entity, field, wc as TextBox, canSave);
else if (wc is Label)
SetFormItemLabel(entity, field, wc as Label, canSave);
else if (wc is RadioButton)
SetFormItemRadioButton(entity, field, wc as RadioButton, canSave);
else if (wc is CheckBox)
SetFormItemCheckBox(entity, field, wc as CheckBox, canSave);
else if (wc is ListControl)
SetFormItemListControl(entity, field, wc as ListControl, canSave);
// 不处理文件上传
else if (wc is FileUpload)
return;
else
{
SetControlValue(control, entity[field.Name]);
}
}
else
{
SetControlValue(control, entity[field.Name]);
}
}
/// <summary>文本框</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
/// <param name="canSave"></param>
protected virtual void SetFormItemTextBox(IEntity entity, FieldItem field, TextBox control, Boolean canSave)
{
Type type = field.Type;
Object value = entity[field.Name];
if (type == typeof(DateTime))
{
DateTime d = (DateTime)value;
// 有时候可能并不需要默认时间
//if (Helper.IsEntityNullKey(entity) && d == DateTime.MinValue) d = DateTime.Now;
value = d.ToString("yyyy-MM-dd HH:mm:ss");
}
if (!SetControlValue(control, value)) control.Text = value != null ? value.ToString() : "";
}
/// <summary>标签</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
/// <param name="canSave"></param>
protected virtual void SetFormItemLabel(IEntity entity, FieldItem field, Label control, Boolean canSave)
{
Type type = field.Type;
if (type == typeof(DateTime))
{
DateTime d = (DateTime)entity[field.Name];
if (Helper.IsEntityNullKey(entity) && d == DateTime.MinValue) d = DateTime.Now;
control.Text = d.ToString("yyyy-MM-dd HH:mm:ss");
}
else if (type == typeof(Decimal))
{
Decimal d = (Decimal)entity[field.Name];
control.Text = d.ToString("c");
}
else
control.Text = String.Empty + entity[field.Name];
}
/// <summary>复选框</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
/// <param name="canSave"></param>
protected virtual void SetFormItemCheckBox(IEntity entity, FieldItem field, CheckBox control, Boolean canSave)
{
Type type = field.Type;
if (type == typeof(Boolean))
control.Checked = (Boolean)entity[field.Name];
else if (type == typeof(Int32))
control.Checked = (Int32)entity[field.Name] != 0;
else
control.Checked = entity[field.Name] != null;
}
/// <summary>列表框</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
/// <param name="canSave"></param>
protected virtual void SetFormItemListControl(IEntity entity, FieldItem field, ListControl control, Boolean canSave)
{
if (control.Items.Count < 1 || !String.IsNullOrEmpty(control.DataSourceID))
{
control.DataBind();
// 这个赋值会影响RequiresDataBinding，而RequiresDataBinding会导致列表控件在OnPreRender阶段重新绑定，造成当前设定的值丢失。
//control.AppendDataBoundItems = false;
}
if (control.Items.Count < 1) return;
String value = String.Empty + entity[field.Name];
try
{
control.SelectedValue = value;
if (control.GetType() == typeof(DropDownList) || control.GetType() == typeof(ListControl))
{
/*
* 对于ListControl和DropDownList,仅PostBack时有可能抛出异常,初次打开有可能在PerformDataBinding中抛出异常,所以要做额外检测
*
* 因为DropDownList.SelectedIndex get时有可能修改Items[0].Selected, 所以下面代码最好避免访问SelectedIndex,SelectedValue
*
* 对于XControl.DropDownList始终没问题
* */
var selected = false;
for (int i = 0; i < control.Items.Count; i++)
{
var item = control.Items[i];
if (item.Selected)
{
selected = item.Value == value;
break;
}
}
if (!selected)
{
// 没有任何选中项或选中项不是设置的值
throw new ArgumentException();
}
}
}
catch (ArgumentException)
{
var li = control.Items.FindByValue(value);
if (li == null)
{
li = new ListItem(value, value);
control.Items.Add(li);
}
control.ClearSelection();
li.Selected = true;
}
}
/// <summary>单选框</summary>
/// <param name="entity"></param>
/// <param name="field"></param>
/// <param name="control"></param>
/// <param name="canSave"></param>
protected virtual void SetFormItemRadioButton(IEntity entity, FieldItem field, RadioButton control, Boolean canSave)
{
List<RadioButton> list = new List<RadioButton>();
// 找到同一级同组名的所有单选
foreach (Control item in control.Parent.Controls)
{
if (!(item is RadioButton)) continue;
RadioButton rb = item as RadioButton;
if (rb.GroupName != control.GroupName) continue;
list.Add(rb);
}
if (list.Count < 1) return;
// 特殊处理数字
if (field.Type == typeof(Int32))
{
Int32 id = (Int32)entity[field.Name];
if (id < 0 || id >= list.Count) id = 0;
for (int i = 0; i < list.Count; i++)
{
list[i].Checked = (i == id);
}
}
else
{
String value = String.Empty + entity[field.Name];
foreach (RadioButton item in list)
{
item.Checked = item.Text == value;
}
}
}
/// <summary>设置控件的不允许空</summary>
/// <param name="field"></param>
/// <param name="control"></param>
/// <param name="canSave"></param>
protected virtual void SetNotAllowNull(FieldItem field, Control control, Boolean canSave)
{
if (field.IsNullable) return;
// Label后面不需要
if (control is Label) return;
var lc = new LiteralControl();
lc.Text = "<font style='color:#FF0000;font-size:16pt;'> *</font>";
Int32 p = control.Parent.Controls.IndexOf(control);
// 有时候可能无法添加，但是不影响使用，应该屏蔽异常
try
{
control.Parent.Controls.AddAt(p + 1, lc);
}
catch { }
}
#endregion
#region 辅助
private static Boolean GetControlValue(Control control, out Object value)
{
TypeX tx = control.GetType();
String name = tx.GetCustomAttributeValue<ControlValuePropertyAttribute, String>();
PropertyInfoX pix = null;
if (!String.IsNullOrEmpty(name)) pix = PropertyInfoX.Create(tx.Type, name);
if (pix == null) pix = PropertyInfoX.Create(tx.Type, "Value");
if (pix == null) pix = PropertyInfoX.Create(tx.Type, "Text");
if (pix != null)
{
value = pix.GetValue(control);
return true;
}
value = null;
return false;
}
private static Boolean SetControlValue(Control control, Object value)
{
TypeX tx = control.GetType();
String name = tx.GetCustomAttributeValue<ControlValuePropertyAttribute, String>();
PropertyInfoX pix = null;
if (!String.IsNullOrEmpty(name)) pix = PropertyInfoX.Create(tx.Type, name);
if (pix == null) pix = PropertyInfoX.Create(tx.Type, "Value");
if (pix == null) pix = PropertyInfoX.Create(tx.Type, "Text");
if (pix != null)
{
if (value == null && pix.Type.IsValueType) return false;
pix.SetValue(control, value);
return true;
}
return false;
}
/// <summary>查找表单控件</summary>
/// <param name="id"></param>
/// <returns></returns>
protected virtual Control FindControl(string id)
{
Control control = ControlHelper.FindControlByField<Control>(Container, id);
if (control != null) return control;
control = Container.FindControl(id);
if (control != null) return control;
return ControlHelper.FindControl<Control>(Container, id);
}
/// <summary>查找字段对应的控件</summary>
/// <param name="field"></param>
/// <returns></returns>
protected virtual Control FindControlByField(FieldItem field)
{
return FindControl(ItemPrefix + field.Name);
}
#endregion
}
}
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