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88 lines
3.3 KiB
88 lines
3.3 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 UpdateUtil
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{
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/// <summary>
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/// 更新
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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="keyColumnValue">条件的值</param>
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/// <param name="fieldAndValuePairs">更新的字段及其值。因此必须是偶数对</param>
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/// <returns>更新失败返回false，否则返回true</returns>
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public static bool Update(string table, string keyColumn, string keyColumnValue, params string[] fieldAndValuePairs)
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{
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string updateStr = GetUpdateString(table, keyColumn, keyColumnValue, fieldAndValuePairs);
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if (string.IsNullOrEmpty(updateStr))
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return true;
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return SqlHelperEx.DoExecuteNonQuery(updateStr);
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}
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/// <summary>
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/// 获取更新的sql语句（以换行结尾）
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/// <para>如果没有更新的字段和值，则返回string.Empty</para>
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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="keyColumnValue">条件的值</param>
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/// <param name="fieldAndValuePairs">更新的字段及其值。因此必须是偶数对</param>
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public static string GetUpdateString(string table, string keyColumn, string keyColumnValue, params string[] fieldAndValuePairs)
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{
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string updateStr = string.Empty;
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if (fieldAndValuePairs == null || fieldAndValuePairs.Length == 0)
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return updateStr;
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if (fieldAndValuePairs.Length % 2 == 1)
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throw new ArgumentException("fieldAndValuePairs参数必须为偶数个：分别对应字段及其值");
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string begin = "update " + table + " set ";
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string end = string.Format(" where " + keyColumn + @" = '{0}'
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", keyColumnValue);
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for (int i = 0; i < fieldAndValuePairs.Length; i++) {
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string field = fieldAndValuePairs[i];
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i++;
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string value = fieldAndValuePairs[i];
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updateStr += field + "='" + value + "',";
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}
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updateStr = updateStr.Substring(0, updateStr.Length - 1);
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updateStr = begin + updateStr + end;
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return updateStr;
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}
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/// <summary>
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/// 获取更新的sql语句.
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/// <para>如果没有更新的字段和值，则返回string.Empty</para>
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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="keyColumnValue">条件的值</param>
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/// <param name="fieldAndValuePairs">更新的字段及其值</param>
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/// <returns></returns>
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public static string GetUpdateString(string table, string keyColumn, string keyColumnValue, Dictionary<string, string> fieldAndValuePairs)
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{
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string updateStr = string.Empty;
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if (fieldAndValuePairs == null || fieldAndValuePairs.Count == 0)
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return updateStr;
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string begin = "update " + table + " set ";
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string end = string.Format(" where " + keyColumn + @" = '{0}'", keyColumnValue);
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//for (int i = 0; i < fieldAndValuePairs.Count; i++) {
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// string field = fieldAndValuePairs[i];
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// i++;
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// string value = fieldAndValuePairs[i];
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// updateStr += field + "='" + value + "',";
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//}
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foreach (var item in fieldAndValuePairs) {
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updateStr += item.Key + "='" + item.Value + "',";
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}
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updateStr = updateStr.Substring(0, updateStr.Length - 1);
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updateStr = begin + updateStr + end;
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return updateStr;
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}
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}
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}
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