/// <summary>
/// 根据条件查询表
/// </summary>
/// <param name="dbHelper">数据库帮助类</param>
/// <param name="tableStructure">表结构</param>
/// <param name="fieldClass">条件筛选的字段</param>
/// <param name="fieldValue">条件筛选的字段值，可空</param>
/// <param name="orderByString">排序语句，此值为null时根据UPDATEDATE排序</param>
/// <returns></returns>
public static DataTable QueryTable(DbHelper dbHelper, TableStructure tableStructure, FieldClass fieldClass, string fieldValue, string orderByString)
{
string whereClause = null;
if (!string.IsNullOrEmpty(fieldValue))
{
if (fieldClass.FieldType == typeof(string))
{
whereClause = $"{fieldClass.Name} like '%{fieldValue}%'";
}
else if (fieldClass.FieldType == typeof(DateTime))
{
whereClause = $"{fieldClass.Name} = #{fieldValue}#";
}
else
{
whereClause = $"{fieldClass.Name} = {fieldValue}";
}
}
return(QueryTable(dbHelper, tableStructure, whereClause, orderByString));
}
/// <summary>
/// 获取指定字段对应字典表的指定名称对应的编码
/// </summary>
/// <param name="tableFields"></param>
/// <param name="fieldName">表中的字段，该字段关联字典表</param>
/// <param name="name">字典表中的值（即名称）</param>
/// <returns></returns>
public static string GetDictionaryCode(this TableStructure tableFields, string fieldName, string name)
{
return(tableFields.Fields.First(v => v.Name.Equals(fieldName)).DictionaryTable.CodeNameDict.FirstOrDefault(v => v.Value.Equals(name)).Key);
}
/// <summary>
/// 获取指定字段对应字典表的全部值（名称）
/// </summary>
/// <param name="tableFields">表</param>
/// <param name="fieldName">表中的字段，该字段关联字典表</param>
/// <returns></returns>
public static string[] GetDictionaryValues(this TableStructure tableFields, string fieldName)
{
return(tableFields.Fields.First(v => v.Name.Equals(fieldName)).DictionaryTable.CodeNameDict.Values.ToArray());
}
/// <summary>
/// 根据条件查询表
/// </summary>
/// <param name="dbHelper">数据库帮助类</param>
/// <param name="tableStructure">表结构</param>
/// <param name="fieldName">条件筛选的字段</param>
/// <param name="fieldValue">条件筛选的字段值，可空</param>
/// <param name="orderbyString">排序语句，此值为null时根据UPDATEDATE排序</param>
/// <returns></returns>
public static DataTable QueryTable(DbHelper dbHelper, TableStructure tableStructure, string fieldName, string fieldValue, string orderbyString)
{
FieldClass fieldClass = tableStructure.Fields.FirstOrDefault(v => v.Name == fieldName);
return(QueryTable(dbHelper, tableStructure, fieldClass, fieldValue, orderbyString));
}