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234 lines
9.6 KiB
234 lines
9.6 KiB
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using FirebirdSql.Data.FirebirdClient;
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using System.IO;
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using System.Runtime.InteropServices;
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namespace FireBirdUtil.SqlUtils
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{
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public static class SQLExecuteUtil
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{
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/// <summary>
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/// 向指定数据库的指定表中，插入一条数据。
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/// <para>数据的Key为字段，Value为字段对应的值</para>
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/// </summary>
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/// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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/// <param name="tableName">表名</param>
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/// <param name="fieldsValues">一条数据的信息</param>
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public static void Insert(string database, string tableName, IDictionary<string, object> fieldsValues)
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{
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var insertSql = SqlUtil.GetInsertSql(tableName, fieldsValues);
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using (FbConnection conn = new FbConnection(GetConnectionString(database))) {
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conn.Open();
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SqlExecuteBaseUtil.ExecuteNonQuery(conn, null, insertSql);
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}
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}
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/// <summary>
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/// 删除符合条件的数据
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/// </summary>
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/// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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/// <param name="tableName">表名</param>
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/// <param name="conditions">以where打头的条件</param>
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public static void Delete(string database, string tableName, string conditions)
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{
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var deleteSql = SqlUtil.GetDeleteSql(tableName, conditions);
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using (FbConnection conn = new FbConnection(GetConnectionString(database))) {
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conn.Open();
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SqlExecuteBaseUtil.ExecuteNonQuery(conn, null, deleteSql);
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}
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}
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/// <summary>
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/// 更新符合条件的数据
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/// </summary>
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/// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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/// <param name="tableName">表名</param>
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/// <param name="newValues">新值：Key为字段名，Value为新值</param>
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/// <param name="conditions">以where打头的条件</param>
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public static void Update(string database, string tableName, Dictionary<string, object> newValues, string conditions)
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{
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var updateSql = SqlUtil.GetUpdateSql(tableName, newValues, conditions);
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using (FbConnection conn = new FbConnection(GetConnectionString(database))) {
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conn.Open();
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SqlExecuteBaseUtil.ExecuteNonQuery(conn, null, updateSql);
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}
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}
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/// <summary>
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/// 数据库是否存在
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/// </summary>
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/// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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public static bool IsDatabaseExist(string database)
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{
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return File.Exists(database);
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}
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/// <summary>
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/// 如果指定数据库中，不存在指定的表，则根据创建表的参数，创建之
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/// </summary>
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/// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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/// <param name="tableName">表名</param>
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/// <param name="tableParams">创建表的字段的相关参数信息</param>
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public static void CreateTableIfNotExist(string database, string tableName, string tableParams)
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{
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if (IsTableExist(database, tableName))
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return;
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CreateTable(database, tableName, tableParams);
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}
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/// <summary>
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/// 在指定数据库中，判断表是否存在
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/// </summary>
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/// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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/// <param name="tableName">表名</param>
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public static bool IsTableExist(string database, string tableName)
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{
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bool exist = false;
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using (FbConnection conn = new FbConnection(GetConnectionString(database))) {
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conn.Open();
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exist = SqlExecuteBaseUtil.ExecuteScalar<bool>(conn, null, SqlUtil.GetJudgeTableExistSql(tableName), obj => {
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int count = 0;
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if (obj.Equals(null) || obj.Equals(System.DBNull.Value)) {
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count = -1;
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} else {
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count = (int)obj;
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}
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return count > 0;
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});
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}
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return exist;
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}
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/// <summary>
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/// 在指定数据库中，创建数据表
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/// </summary>
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/// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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/// <param name="tableName">表名</param>
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/// <param name="tableParams">创建表的字段的相关参数信息</param>
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public static void CreateTable(string database, string tableName, string tableParams)
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{
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FbConnection cn = new FbConnection(GetConnectionString(database));
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cn.Open();
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string strSQL = SqlUtil.GetCreateTableSql(tableName, tableParams);
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SqlExecuteBaseUtil.ExecuteNonQuery(cn, null, strSQL);
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cn.Close();
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}
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/// <summary>
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/// 如果数据库不存在，则创建数据库
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/// </summary>
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/// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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public static void CreateDataBaseIfNotExist(string database)
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{
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if (!File.Exists(database))
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FbConnection.CreateDatabase(GetConnectionString(database));
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}
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/// <summary>
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/// 获取连接字符串
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/// </summary>
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/// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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public static string GetConnectionString(string database)
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{
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FbConnectionStringBuilder cs = new FbConnectionStringBuilder();
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cs.Database = database;
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cs.UserID = "SYSDBA";
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cs.Password = "masterkey";
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cs.Charset = "UTF8";
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cs.ServerType = FbServerType.Embedded;
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return cs.ToString();
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}
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#region 注销的代码:插入数据。注销原因：要求数据的顺序与数据表的顺序一致
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///// <summary>
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///// 向指定数据库的指定表中，插入一条数据。
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///// <para>fields为字段，values为与字段对应的值</para>
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///// </summary>
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///// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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///// <param name="tableName">表名</param>
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///// <param name="fields">一条数据的字段信息，与值信息一一对应</param>
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///// <param name="values">一条数据的值信息，与字段信息一一对应</param>
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//public static void Insert(string database, string tableName, IList<string> fields, IList<object> values)
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//{
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// var preparedParams = PrepareInsertSQLParams(fields, values);
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// InsertPrepared(database, tableName, preparedParams);
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//}
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///// <summary>
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///// 向指定数据库的指定表中，插入一条数据。
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///// <para>数据的Key为字段，Value为字段对应的值</para>
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///// </summary>
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///// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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///// <param name="tableName">表名</param>
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///// <param name="fieldsValues">一条数据的信息</param>
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//public static void Insert(string database, string tableName, IDictionary<string, object> fieldsValues)
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//{
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// var preparedParams = PrepareInsertSQLParams(fieldsValues);
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// InsertPrepared(database, tableName, preparedParams);
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//}
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///// <summary>
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///// 向指定数据库的指定表中，插入一条数据。
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///// <para>数据的Key为字段对应的变量名(字段前加@)，Value为字段对应的值</para>
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///// </summary>
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///// <param name="database">数据库名（在fbembed.dll所在目录；或者是绝对路径+数据库名）</param>
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///// <param name="tableName">表名</param>
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///// <param name="fieldsValues">一条数据的信息，是经过处理的</param>
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//private static void InsertPrepared(string database, string tableName, IDictionary<string, object> fieldsValues)
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//{
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// string insertString = "insert into {0} values ({1})";//"insert into tb_user values (@id, @word)"
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// insertString = string.Format(insertString, tableName, string.Join(", ", fieldsValues.Keys));
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// using (FbConnection conn = new FbConnection(GetConnectionString(database))) {
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// conn.Open();
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// using (FbCommand insertData = conn.CreateCommand()) {
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// insertData.CommandText = insertString;
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// insertData.Parameters.Clear();
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// foreach (var item in fieldsValues) {
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// insertData.Parameters.AddWithValue(item.Key, item.Value);
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// }
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// insertData.ExecuteNonQuery();
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// }
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// }
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//}
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// /// <summary>
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// /// 获取插入数据参数，key为变量名，value为值。
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// /// <para>在字段名前加@，使其成为变量名</para>
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// /// </summary>
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// private static IDictionary<string, object> PrepareInsertSQLParams(IList<string> fields, IList<object> values)
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// {
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//#if DEBUG
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// if (fields == null || values == null)
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// throw new ApplicationException("没有初始化参数");
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// if (fields.Count != values.Count)
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// throw new ApplicationException("字段与值的数量不匹配");
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//#endif
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// Dictionary<string, object> paramS = new Dictionary<string, object>();
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// for (int i = 0; i < fields.Count; i++)
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// paramS.Add("@" + fields[i], values[i]);
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// return paramS;
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// }
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// /// <summary>
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// /// 获取插入数据参数，key为变量名，value为值。
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// /// <para>在字段名前加@，使其成为变量名</para>
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// /// </summary>
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// private static IDictionary<string, object> PrepareInsertSQLParams(IDictionary<string, object> fieldsValues)
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// {
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//#if DEBUG
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// if (fieldsValues == null || fieldsValues.Count == 0)//TODO:为0时，是否要特殊处理？即不执行插入操作
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// throw new ApplicationException("没有初始化参数");
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//#endif
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// Dictionary<string, object> paramS = new Dictionary<string, object>();
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// foreach (var item in fieldsValues)
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// paramS.Add("@" + item.Key, item.Value);
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// return paramS;
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// }
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#endregion
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}
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}
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