C#進行IN條件查詢的SQL語句使用SqlParameter的通用方法
阿新 • • 發佈:2021-08-23
- 建立物件
public class SqlParameterInfo { /// <summary> /// 變數字串 /// </summary> public string ParameterStr { get; set; } /// <summary> /// 引數陣列 /// </summary> public SqlParameter[] ParameterArr { get; set; } }
- 通用方法
///<summary> /// 構建引數資訊 /// </summary> /// <param name="sgin">引數頭名稱</param> /// <param name="valArr">引數值陣列</param> /// <param name="parameters">已存在的引數陣列</param> /// <returns></returns> public static SqlParameterInfo BuildParameterInfoByObj(stringsgin, object[] valArr, SqlParameter[] parameters) { if (string.IsNullOrEmpty(sgin)) { sgin = "tmpParameter" + new Random().Next(1, 100); } if (valArr==null||valArr.Length==0) { return new SqlParameterInfo() { ParameterStr = string.Empty, ParameterArr = parameters }; } StringBuilder builder = new StringBuilder(); var parameterList = new List<SqlParameter>(); if (parameters!=null&& parameters.Length>0) { parameterList.AddRange(parameters); } for (int i = 0; i < valArr.Length; i++) { builder.Append($"@{sgin}{i},"); parameterList.Add(new SqlParameter($"@{sgin}{i}",valArr[i])); } return new SqlParameterInfo() { ParameterStr = builder.ToString().TrimEnd(','),ParameterArr=parameterList.ToArray() }; }
- 呼叫方法Demo
public object Test() { using (Test entities = new Test()) { var parameterValArr = new object[] { "IT部", "人力資源行政部", "財務部" }; var parameterValArr2 = new object[] { 1, 5, 6 }; var parameterResult = MsSqlHelper.BuildParameterInfoByObj("Dep", parameterValArr, null); var parameterResult2 = MsSqlHelper.BuildParameterInfoByObj("Id", parameterValArr2, parameterResult.ParameterArr); string sql = $"SELECT DepCode,DepName FROM Test WHERE DepName IN({parameterResult.ParameterStr}) AND Id IN ({parameterResult2.ParameterStr})"; var result = entities.Database.SqlQuery<Test>(sql, parameterResult2.ParameterArr).ToList(); return result; } }