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51 lines
1.4 KiB
51 lines
1.4 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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namespace WeighBusiness.Utils.SqlUtils
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{
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public class DeleteUtil
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{
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/// <summary>
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/// 获取删除Sql语句。
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/// </summary>
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/// <param name="table">表</param>
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/// <param name="keyColumn">条件的列名</param>
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/// <param name="keyColumnValues">条件的值</param>
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public static string GetDeleteString(string table, string keyColumn, params string[] keyColumnValues)
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{
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string deleteSql = string.Empty;
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if (keyColumnValues == null || keyColumnValues.Length == 0)
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return deleteSql;
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string format = string.Format(@"delete from {0} where {1}=", table, keyColumn);
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deleteSql = format + "'" + string.Join("' or " + keyColumn + " = '", keyColumnValues) + "'";
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return deleteSql;
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}
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public static string GetDeleteTableSql(string table)
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{
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return "drop table " + table;
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}
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public static bool DeleteTableIfExist(string table)
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{
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string errorMessage;
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return DeleteTableIfExist(table, out errorMessage);
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}
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public static bool DeleteTableIfExist(string table, out string errorMessage)
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{
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errorMessage = string.Empty;
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if (!SqlUtilBase.IsDatabaseExist())
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return true;
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if (SqlUtilBase.IsTableExist(table)) {
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var deleteSql = GetDeleteTableSql(table);
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return SqlHelperEx.DoExecuteNonQuery(deleteSql, out errorMessage);
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}
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return true;
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}
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}
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}
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