/// <summary>
/// 获取数据权限的下拉菜单
/// </summary>
/// <param name="KnifeVirgo">wtm context</param>
/// <param name="filter">filter</param>
/// <returns>数据权限关联表的下拉菜单</returns>
public List <ComboSelectListItem> GetItemList(VirgoContext KnifeVirgo, string filter = null, List <string> ids = null)
{
var user = KnifeVirgo?.LoginUserInfo;
Expression <Func <T, bool> > where = null;
if (ids != null)
{
where = ids.GetContainIdExpression <T>();
}
else
{
if (string.IsNullOrEmpty(filter) == false)
{
ChangePara cp = new ChangePara();
ParameterExpression pe = Expression.Parameter(typeof(T));
// var toString = Expression.Call(cp.Change(_displayField.Body, pe), "ToString", new Type[] { });
var tolower = Expression.Call(cp.Change(_displayField.Body, pe), "ToLower", new Type[] { });
var exp = Expression.Call(tolower, "Contains", null, Expression.Constant(filter.ToLower()));
where = Expression.Lambda <Func <T, bool> >(exp, pe);
if (_where != null)
{
var temp = cp.Change(_where.Body, pe);
var together = Expression.And(where.Body, temp);
where = Expression.Lambda <Func <T, bool> >(together, pe);
}
}
else
{
where = _where;
}
if (where == null)
{
where = x => 1 == 1;
}
}
List <ComboSelectListItem> rv = new List <ComboSelectListItem>();
if (user.Roles?.Where(x => x.RoleCode == "001").FirstOrDefault() == null && user.DataPrivileges?.Where(x => x.RelateId == null).FirstOrDefault() == null)
{
rv = KnifeVirgo.DC.Set <T>().Where(x => user.DataPrivileges.Select(y => y.RelateId).Contains(x.ID.ToString())).Where(where).GetSelectListItems(null, _displayField, null, ignorDataPrivilege: true);
}
else
{
rv = KnifeVirgo.DC.Set <T>().Where(where).GetSelectListItems(null, _displayField, null, ignorDataPrivilege: true);
}
return(rv);
}
/// <summary>
/// 查询数据源，并转化成TreeSelectListItem列表
/// </summary>
/// <typeparam name="T">数据源类型</typeparam>
/// <param name="baseQuery">基础查询</param>
/// <param name="dps">数据权限</param>
/// <param name="whereCondition">条件语句</param>
/// <param name="textField">表达式用来获取Text字段对应的值</param>
/// <param name="valueField">表达式用来获取Value字段对应的值，不指定则默认使用Id字段</param>
/// <param name="iconField">表达式用来获取icon字段对应的值</param>
/// <param name="urlField">表达式用来获取Url字段对应的值</param>
/// <param name="tagField">表达式用来获取Tag字段对应的值</param>
/// <param name="expandField">表达式用来获取Expanded字段对应的值，指示节点是否展开</param>
/// <param name="ignorDataPrivilege">忽略数据权限判断</param>
/// <param name="SortByName">是否根据Text字段排序，默认为是</param>
/// <returns>SelectListItem列表</returns>
public static List <TreeSelectListItem> GetTreeSelectListItems <T>(this IQueryable <T> baseQuery
, List <DataPrivilege> dps
, Expression <Func <T, bool> > whereCondition
, Expression <Func <T, string> > textField
, Expression <Func <T, string> > valueField = null
, Expression <Func <T, string> > iconField = null
, Expression <Func <T, string> > urlField = null
, Expression <Func <T, string> > tagField = null
, Expression <Func <T, bool> > expandField = null
, bool ignorDataPrivilege = false
, bool SortByName = true)
where T : TopBasePoco, ITreeData <T>
{
var query = baseQuery;
//如果条件不为空，则拼上条件
if (whereCondition != null)
{
query = query.Where(whereCondition);
}
//如果没有指定忽略权限，则拼接权限过滤的where条件
if (ignorDataPrivilege == false)
{
query = AppendSelfDPWhere(query, dps);
}
//处理后面要使用的expression
if (valueField == null)
{
valueField = x => x.ID.ToString();
}
Expression <Func <T, string> > parentField = x => x.ParentId.ToString();
//定义PE
ParameterExpression pe = Expression.Parameter(typeof(T));
ChangePara cp = new ChangePara();
//创建新类，形成类似 new SimpleTreeTextAndValue() 的表达式
NewExpression newItem = Expression.New(typeof(TreeSelectListItem));
//绑定Text字段，形成类似 Text = textField 的表达式
var textMI = typeof(TreeSelectListItem).GetMember("Text")[0];
MemberBinding textBind = Expression.Bind(textMI, cp.Change(textField.Body, pe));
//绑定Value字段，形成类似 Value = valueField 的表达式
var valueMI = typeof(TreeSelectListItem).GetMember("Id")[0];
MemberBinding valueBind = Expression.Bind(valueMI, cp.Change(valueField.Body, pe));
//绑定ParentId字段，形成类似 Value = valueField 的表达式
var parentMI = typeof(TreeSelectListItem).GetMember("ParentId")[0];
MemberBinding parentBind = Expression.Bind(parentMI, cp.Change(parentField.Body, pe));
//绑定Url字段，形成类似 Value = valueField 的表达式
MemberBinding urlBind = null;
var urlMI = typeof(TreeSelectListItem).GetMember("Url")[0];
if (urlField != null)
{
urlBind = Expression.Bind(urlMI, cp.Change(urlField.Body, pe));
}
else
{
urlBind = Expression.Bind(urlMI, Expression.Constant(string.Empty));
}
//绑定icon字段，形成类似 ICon = iconField 的表达式
MemberBinding iconBind = null;
var iconMI = typeof(TreeSelectListItem).GetMember("ICon")[0];
if (iconField != null)
{
iconBind = Expression.Bind(iconMI, cp.Change(iconField.Body, pe));
}
else
{
iconBind = Expression.Bind(iconMI, Expression.Constant(string.Empty));
}
//绑定Tag字段，形成类似 Value = valueField 的表达式
MemberBinding tagBind = null;
var tagMI = typeof(TreeSelectListItem).GetMember("Tag")[0];
if (tagField != null)
{
tagBind = Expression.Bind(tagMI, cp.Change(tagField.Body, pe));
}
else
{
tagBind = Expression.Bind(tagMI, Expression.Constant(""));
}
//绑定Tag字段，形成类似 Value = valueField 的表达式
MemberBinding expandBind = null;
var expandMI = typeof(TreeSelectListItem).GetMember("Expended")[0];
if (expandField != null)
{
expandBind = Expression.Bind(expandMI, cp.Change(expandField.Body, pe));
}
else
{
expandBind = Expression.Bind(expandMI, Expression.Constant(false));
}
//合并创建新类和绑定字段的表达式，形成类似 new SimpleTextAndValue{ Text = textField, Value = valueField} 的表达式
MemberInitExpression init = Expression.MemberInit(newItem, textBind, valueBind, iconBind, parentBind, urlBind, tagBind, expandBind);
//将最终形成的表达式转化为Lambda，形成类似 x=> new SimpleTextAndValue { Text = x.textField, Value = x.valueField} 的表达式
var lambda = Expression.Lambda <Func <T, TreeSelectListItem> >(init, pe);
List <TreeSelectListItem> rv = null;
//根据Text对下拉菜单数据排序
if (SortByName == true)
{
rv = query.Select(lambda).OrderBy(x => x.Text).ToList();
}
else
{
rv = query.Select(lambda).ToList();
}
rv.ForEach(x =>
{
x.Children = rv.Where(y => y.ParentId == x.Id).ToList();
});
return(rv.Where(x => string.IsNullOrEmpty(x.ParentId)).ToList());
}
/// <summary>
/// 查询数据源，并转化成SelectListItem列表
/// </summary>
/// <typeparam name="T">数据源类型</typeparam>
/// <param name="baseQuery">基础查询</param>
/// <param name="dps">数据权限</param>
/// <param name="whereCondition">条件语句</param>
/// <param name="textField">SelectListItem中Text字段对应的值</param>
/// <param name="valueField">SelectListItem中Value字段对应的值，默认为Id列</param>
/// <param name="ignorDataPrivilege">忽略数据权限判断</param>
/// <param name="SortByName">是否根据Text字段排序，默认为是</param>
/// <returns>SelectListItem列表</returns>
public static List <ComboSelectListItem> GetSelectListItems <T>(this IQueryable <T> baseQuery
, List <DataPrivilege> dps
, Expression <Func <T, bool> > whereCondition
, Expression <Func <T, string> > textField
, Expression <Func <T, string> > valueField = null
, bool ignorDataPrivilege = false
, bool SortByName = true)
where T : TopBasePoco
{
var query = baseQuery;
//如果条件不为空，则拼上条件
if (whereCondition != null)
{
query = query.Where(whereCondition);
}
//如果value字段为空，则默认使用Id字段作为value值
if (valueField == null)
{
valueField = x => x.GetID().ToString().ToLower();
}
//如果没有指定忽略权限，则拼接权限过滤的where条件
if (ignorDataPrivilege == false || dps != null)
{
query = AppendSelfDPWhere(query, dps);
}
if (typeof(T).IsSubclassOf(typeof(PersistPoco)))
{
var mod = new IsValidModifier();
var newExp = mod.Modify(query.Expression);
query = query.Provider.CreateQuery <T>(newExp) as IOrderedQueryable <T>;
}
//定义PE
ParameterExpression pe = Expression.Parameter(typeof(T));
ChangePara cp = new ChangePara();
//创建新类，形成类似 new SimpleTextAndValue() 的表达式
NewExpression newItem = Expression.New(typeof(ComboSelectListItem));
//绑定Text字段，形成类似 Text = textField 的表达式
var textMI = typeof(ComboSelectListItem).GetMember("Text")[0];
MemberBinding textBind = Expression.Bind(textMI, cp.Change(textField.Body, pe));
//绑定Value字段，形成类似 Value = valueField 的表达式
var valueMI = typeof(ComboSelectListItem).GetMember("Value")[0];
MemberBinding valueBind = Expression.Bind(valueMI, cp.Change(valueField.Body, pe));
//如果是树形结构，给ParentId赋值
MemberBinding parentBind = null;
var parentMI = typeof(ComboSelectListItem).GetMember("ParentId")[0];
if (typeof(ITreeData <T>).IsAssignableFrom(typeof(T)))
{
var parentMember = Expression.MakeMemberAccess(pe, typeof(ITreeData).GetProperty("ParentId"));
var p = Expression.Call(parentMember, "ToString", new Type[] { });
var p1 = Expression.Call(p, "ToLower", new Type[] { });
parentBind = Expression.Bind(parentMI, p1);
}
else
{
parentBind = Expression.Bind(parentMI, Expression.Constant(string.Empty));
}
//合并创建新类和绑定字段的表达式，形成类似 new SimpleTextAndValue{ Text = textField, Value = valueField} 的表达式
MemberInitExpression init = Expression.MemberInit(newItem, textBind, valueBind, parentBind);
//将最终形成的表达式转化为Lambda，形成类似 x=> new SimpleTextAndValue { Text = x.textField, Value = x.valueField} 的表达式
var lambda = Expression.Lambda <Func <T, ComboSelectListItem> >(init, pe);
List <ComboSelectListItem> rv = new List <ComboSelectListItem>();
//根据Text对下拉菜单数据排序
if (SortByName == true)
{
rv = query.Select(lambda).OrderBy(x => x.Text).ToList();
}
else
{
rv = query.Select(lambda).ToList();
}
return(rv);
}
/// <summary>
/// 查询数据源，并转化成SelectListItem列表
/// </summary>
/// <typeparam name="T">数据源类型</typeparam>
/// <param name="baseQuery">基础查询</param>
/// <param name="dps">数据权限</param>
/// <param name="whereCondition">条件语句</param>
/// <param name="textField">SelectListItem中Text字段对应的值</param>
/// <param name="valueField">SelectListItem中Value字段对应的值，默认为Id列</param>
/// <param name="ignorDataPrivilege">忽略数据权限判断</param>
/// <param name="SortByName">是否根据Text字段排序，默认为是</param>
/// <returns>SelectListItem列表</returns>
public static List <ComboSelectListItem> GetSelectListItems <T>(this IQueryable <T> baseQuery
, List <DataPrivilege> dps
, Expression <Func <T, bool> > whereCondition
, Expression <Func <T, string> > textField
, Expression <Func <T, string> > valueField = null
, bool ignorDataPrivilege = false
, bool SortByName = true)
where T : TopBasePoco
{
var query = baseQuery;
//如果条件不为空，则拼上条件
if (whereCondition != null)
{
query = query.Where(whereCondition);
}
//如果value字段为空，则默认使用Id字段作为value值
if (valueField == null)
{
valueField = x => x.ID.ToString();
}
//如果没有指定忽略权限，则拼接权限过滤的where条件
if (ignorDataPrivilege == false)
{
query = AppendSelfDPWhere(query, dps);
}
//定义PE
ParameterExpression pe = Expression.Parameter(typeof(T));
ChangePara cp = new ChangePara();
//创建新类，形成类似 new SimpleTextAndValue() 的表达式
NewExpression newItem = Expression.New(typeof(ComboSelectListItem));
//绑定Text字段，形成类似 Text = textField 的表达式
var textMI = typeof(ComboSelectListItem).GetMember("Text")[0];
MemberBinding textBind = Expression.Bind(textMI, cp.Change(textField.Body, pe));
//绑定Value字段，形成类似 Value = valueField 的表达式
var valueMI = typeof(ComboSelectListItem).GetMember("Value")[0];
MemberBinding valueBind = Expression.Bind(valueMI, cp.Change(valueField.Body, pe));
//合并创建新类和绑定字段的表达式，形成类似 new SimpleTextAndValue{ Text = textField, Value = valueField} 的表达式
MemberInitExpression init = Expression.MemberInit(newItem, textBind, valueBind);
//将最终形成的表达式转化为Lambda，形成类似 x=> new SimpleTextAndValue { Text = x.textField, Value = x.valueField} 的表达式
var lambda = Expression.Lambda <Func <T, ComboSelectListItem> >(init, pe);
List <ComboSelectListItem> rv = new List <ComboSelectListItem>();
//根据Text对下拉菜单数据排序
if (SortByName == true)
{
rv = query.Select(lambda).OrderBy(x => x.Text).ToList();
}
else
{
rv = query.Select(lambda).ToList();
}
return(rv);
}
/// <summary>
/// 查询数据源，并转化成TreeSelectListItem列表
/// </summary>
/// <typeparam name="T">数据源类型</typeparam>
/// <param name="baseQuery">基础查询</param>
/// <param name="knifeVirgo">context</param>
/// <param name="whereCondition">条件语句</param>
/// <param name="textField">表达式用来获取Text字段对应的值</param>
/// <param name="valueField">表达式用来获取Value字段对应的值，不指定则默认使用Id字段</param>
/// <param name="iconField">表达式用来获取icon字段对应的值</param>
/// <param name="urlField">表达式用来获取Url字段对应的值</param>
/// <param name="tagField">表达式用来获取Tag字段对应的值</param>
/// <param name="expandField">表达式用来获取Expanded字段对应的值，指示节点是否展开</param>
/// <param name="ignorDataPrivilege">忽略数据权限判断</param>
/// <param name="SortByName">是否根据Text字段排序，默认为是</param>
/// <returns>SelectListItem列表</returns>
public static List <TreeSelectListItem> GetTreeSelectListItems <T>(this IQueryable <T> baseQuery
, VirgoContext knifeVirgo
, Expression <Func <T, string> > textField
, Expression <Func <T, string> > valueField = null
, Expression <Func <T, string> > iconField = null
, Expression <Func <T, string> > urlField = null
, Expression <Func <T, string> > tagField = null
, Expression <Func <T, bool> > expandField = null
, bool ignorDataPrivilege = false
, bool SortByName = true)
where T : TreePoco
{
var dps = knifeVirgo?.LoginUserInfo?.DataPrivileges;
var query = baseQuery.AsNoTracking();
//如果没有指定忽略权限，则拼接权限过滤的where条件
if (ignorDataPrivilege == false)
{
query = AppendSelfDPWhere(query, knifeVirgo, dps);
}
if (typeof(IPersistPoco).IsAssignableFrom(typeof(T)))
{
var mod = new IsValidModifier();
var newExp = mod.Modify(query.Expression);
query = query.Provider.CreateQuery <T>(newExp) as IOrderedQueryable <T>;
}
//处理后面要使用的expression
//if (valueField == null)
//{
valueField = x => x.GetID().ToString().ToLower();
//}
Expression <Func <T, string> > parentField = x => x.ParentId.ToString().ToLower();
//定义PE
ParameterExpression pe = Expression.Parameter(typeof(T));
ChangePara cp = new ChangePara();
//创建新类，形成类似 new SimpleTreeTextAndValue() 的表达式
NewExpression newItem = Expression.New(typeof(TreeSelectListItem));
//绑定Text字段，形成类似 Text = textField 的表达式
var textMI = typeof(TreeSelectListItem).GetMember("Text")[0];
MemberBinding textBind = Expression.Bind(textMI, cp.Change(textField.Body, pe));
//绑定Value字段，形成类似 Value = valueField 的表达式
var valueMI = typeof(TreeSelectListItem).GetMember("Id")[0];
MemberBinding valueBind = Expression.Bind(valueMI, cp.Change(valueField.Body, pe));
//绑定ParentId字段，形成类似 Value = valueField 的表达式
var parentMI = typeof(TreeSelectListItem).GetMember("ParentId")[0];
MemberBinding parentBind = Expression.Bind(parentMI, cp.Change(parentField.Body, pe));
//绑定Url字段，形成类似 Value = valueField 的表达式
MemberBinding urlBind = null;
var urlMI = typeof(TreeSelectListItem).GetMember("Url")[0];
if (urlField != null)
{
urlBind = Expression.Bind(urlMI, cp.Change(urlField.Body, pe));
}
else
{
urlBind = Expression.Bind(urlMI, Expression.Constant(string.Empty));
}
//绑定icon字段，形成类似 ICon = iconField 的表达式
MemberBinding iconBind = null;
var iconMI = typeof(TreeSelectListItem).GetMember("ICon")[0];
if (iconField != null)
{
iconBind = Expression.Bind(iconMI, cp.Change(iconField.Body, pe));
}
else
{
iconBind = Expression.Bind(iconMI, Expression.Constant(string.Empty));
}
//绑定Tag字段，形成类似 Value = valueField 的表达式
MemberBinding tagBind = null;
var tagMI = typeof(TreeSelectListItem).GetMember("Tag")[0];
if (tagField != null)
{
tagBind = Expression.Bind(tagMI, cp.Change(tagField.Body, pe));
}
else
{
tagBind = Expression.Bind(tagMI, Expression.Constant(""));
}
//绑定Tag字段，形成类似 Value = valueField 的表达式
MemberBinding expandBind = null;
var expandMI = typeof(TreeSelectListItem).GetMember("Expended")[0];
if (expandField != null)
{
expandBind = Expression.Bind(expandMI, cp.Change(expandField.Body, pe));
}
else
{
expandBind = Expression.Bind(expandMI, Expression.Constant(false));
}
//合并创建新类和绑定字段的表达式，形成类似 new SimpleTextAndValue{ Text = textField, Value = valueField} 的表达式
MemberInitExpression init = Expression.MemberInit(newItem, textBind, valueBind, iconBind, parentBind, urlBind, tagBind, expandBind);
//将最终形成的表达式转化为Lambda，形成类似 x=> new SimpleTextAndValue { Text = x.textField, Value = x.valueField} 的表达式
var lambda = Expression.Lambda <Func <T, TreeSelectListItem> >(init, pe);
List <TreeSelectListItem> rv = null;
//根据Text对下拉菜单数据排序
if (SortByName == true)
{
rv = query.Select(lambda).OrderBy(x => x.Text).ToList();
}
else
{
rv = query.Select(lambda).ToList();
}
rv.ForEach(x =>
{
x.Children = rv.Where(y => y.ParentId == x.Id).ToList();
});
return(rv.Where(x => string.IsNullOrEmpty(x.ParentId)).ToList());
}
