307 lines
13 KiB
C#
307 lines
13 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Data;
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using System.Diagnostics;
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using System.Configuration;
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using System.Web;
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using System.Web.Security;
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using System.Web.UI;
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using System.Web.UI.WebControls;
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using System.Web.UI.HtmlControls;
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using System.Web.Configuration;
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using System.Data.OleDb;
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namespace Cus_GetSQL
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{
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public class Get_Data
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{
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// 全域變數。從 Stored Procedure 回傳的單一數值，取得符合查詢條件的資料列總筆數
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public int _totalRecords = 0;
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// 取得 Web.config 連線字串的名稱
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public string strConnString = System.Configuration.ConfigurationManager.ConnectionStrings["shopConn"].ToString();
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public Get_Data()
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{
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}
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#region 取得 WebForm 裡的 ObjectDataSource 傳來的參數，並將參數傳送給 SELECT 函數處理
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// true 表示為 ObjectDataSource 要 SELECT 時的預設值
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[System.ComponentModel.DataObjectMethodAttribute(System.ComponentModel.DataObjectMethodType.Select, true)]
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public DataSet Get_ObjectDataSource_Val(string TableName_val, string ColumnName_val, string OrderColumn_val, string Where_val, int startRowIndex, int maxinumRows, string sortExpression)
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{
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// 最後三個參數：startRowIndex, maxinumRows, sortExpression，ObjectDataSource 控制項會自動傳入，開發人員不用手動撰碼傳值
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DataSet ds = null;
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try
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{
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//HttpContext.Current.Response.Write("變數=" & eztrust)
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//檢查所帶進來的參數是否有值(如果為empty會發生錯誤)
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if (TableName_val == null | Convert.ToString(TableName_val)=="")
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{
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TableName_val = "";
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}
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if (ColumnName_val == null | Convert.ToString(ColumnName_val) == "")
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{
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ColumnName_val = "";
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}
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if (OrderColumn_val == null | Convert.ToString(OrderColumn_val) == "")
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{
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OrderColumn_val = "";
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}
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if (Where_val == null | Convert.ToString(Where_val) == "")
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{
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Where_val = "";
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}
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// 參數: (Table名稱、查詢Column名稱集合、Where條件(包括模糊查詢關鍵字)、排序方式(按標題搜尋前)、起始撈取的資料列索引、GridView每頁要顯示的筆數、排序方式(按標題搜尋後))
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ds = SelectData(TableName_val.Trim(), ColumnName_val.Trim(), Where_val, OrderColumn_val.Trim(), startRowIndex, maxinumRows, sortExpression);
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}
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catch (Exception ex)
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{
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throw new Exception(ex.Message);
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//顯示錯誤訊息，如資料庫存取發生錯誤，或網路中斷、資料庫關機
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}
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return ds;
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}
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#endregion
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#region 將接受到的參數，執行SELECT (搭配 Stored Procedure 做「分頁及撈取資料」處理)
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// true 表示為 ObjectDataSource 要 SELECT 時的預設值
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[System.ComponentModel.DataObjectMethodAttribute(System.ComponentModel.DataObjectMethodType.Select, true)]
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public DataSet SelectData(string strTableName, string strColumnName, string strSqlWhere, string strDefaultOrderColumn, int startRowIndex, int maxinumRows, string sortExpression)
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{
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OleDbConnection sqlConn = null;
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OleDbCommand sqlCmd = null;
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OleDbDataAdapter sqlAdapter = null;
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DataSet ds = null;
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string strOrderBy = null;
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try
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{
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sqlConn = new OleDbConnection(strConnString);
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sqlConn.Open();
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if (sqlConn.State == ConnectionState.Open)
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{
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ds = new DataSet();
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// 取得排序資料 (昇幕或降幕)
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if (string.IsNullOrEmpty(sortExpression))
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{
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//排序欄位。第一次進入頁面時，sortExpression 為空值，所以以開發人員在層指定的欄位排序
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strOrderBy = strDefaultOrderColumn;
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}
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else if ((!string.IsNullOrEmpty(sortExpression)) & (sortExpression.IndexOf(" DESC") == -1))
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{
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// 排序欄位。若使用者按下了 GridView 某個欄位的 title，此時 sortExpression 有值，且要由小到大排序
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strOrderBy = sortExpression + " ASC";
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}
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else if ((!string.IsNullOrEmpty(sortExpression)) & (sortExpression.IndexOf(" DESC") != -1))
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{
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// 刪除 ObjectDataSource 自動在最後面加的「 DESC」字樣(5個字元)
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sortExpression = sortExpression.Remove(sortExpression.Length - 5, 5);
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// 排序欄位。若使用者按下了 GridView 某個欄位的 title，此時 sortExpression 有值，且要由大到小排序
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strOrderBy = sortExpression + " DESC";
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}
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// SELECT SQL 的 WHERE 條件 (包含使用者輸入的模糊查詢關鍵字)
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if (string.IsNullOrEmpty(strSqlWhere))
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{
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// 若沒加這句，則當 WHERE 條件為空值時(使用者未輸入搜尋關鍵字)，丟到 Stored Procedure 裡後會 Error
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strSqlWhere = " 1=1 ";
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}
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sqlCmd = new OleDbCommand("dbo.pager_eztrust", sqlConn);
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// 系統中每支程式共用的預存程序名稱
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sqlCmd.CommandType = CommandType.StoredProcedure;
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// 資料來源為 Stored Procedure(預存程序)
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sqlCmd.Parameters.Add(new OleDbParameter("@StartRowIndex", startRowIndex));
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// 目前頁面，要撈的資料，的第一筆資料的索引 (第一筆為 0，依序加 1，依此類推)
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sqlCmd.Parameters.Add(new OleDbParameter("@PageSize", maxinumRows));
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// GridView 每頁要顯示的資料筆數
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sqlCmd.Parameters.Add(new OleDbParameter("@tableName", strTableName));
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sqlCmd.Parameters.Add(new OleDbParameter("@columnName", strColumnName));
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sqlCmd.Parameters.Add(new OleDbParameter("@sqlWhere", strSqlWhere));
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sqlCmd.Parameters.Add(new OleDbParameter("@orderBy", strOrderBy));
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sqlCmd.Parameters.Add(new OleDbParameter("@rowCount", SqlDbType.Int));
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// Stored Procedure 會傳回一個數字(符合查詢條件的資料總筆數)
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sqlCmd.Parameters["@rowCount"].Direction = ParameterDirection.Output;
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// 用來在 GridView 下方的「頁碼列」顯示頁碼之用(Ex: 1 2 3 4 ... 55)
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sqlAdapter = new OleDbDataAdapter(sqlCmd);
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sqlAdapter.Fill(ds);
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_totalRecords = Convert.ToInt32(sqlCmd.Parameters["@rowCount"].Value);
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// 總筆數 (要回傳至前端 .aspx，給 GridView 下方的「頁碼列」顯示用)
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HttpContext.Current.Session["s_RecordTotalCount"] = _totalRecords;
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// 存至 Session，以便在.aspx.vb中取用後，用來在 GridView 下方的「頁碼列」中顯示頁碼之用
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Console.Write("tc: " + _totalRecords);
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int jj = ds.Tables[0].Rows.Count;
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// 實際從資料庫撈回來，儲存在 AP Server 記憶體中 DataSet/DataTable 的資料筆數
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Console.Write(jj);
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// GridView 每頁要呈現的資料筆數
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}
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}
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catch (OleDbException ex)
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{
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Console.WriteLine(ex.ToString());
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throw;
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}
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catch (Exception ex)
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{
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throw new Exception("發生 SqlClient 以外的資料庫錯誤: " + ex.Message);
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}
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finally
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{
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sqlCmd.Dispose();
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sqlAdapter.Dispose();
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ds.Dispose();
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if (sqlConn.State == ConnectionState.Open)
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{
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sqlConn.Close(); sqlConn.Dispose();
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}
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sqlConn.Dispose();
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}
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return ds;
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}
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#endregion
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#region 從 Stored Procedure 回傳的一個整數，為符合查詢條件的資料總筆數，用來在 GridView 下方的「頁碼列」顯示頁碼之用(Ex: 1 2 3 4 ... 55)
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public int getRecordCount(string TableName_val, string ColumnName_val, string OrderColumn_val, string Where_val)
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{
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return _totalRecords;
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}
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#endregion
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}
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public struct GetSqlData
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{
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public string tableName;
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public string columnName;
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public string sqlWhere;
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public string sort;
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public int startRowIndex;
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public int maxinumRows;
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public DataSet selectData()
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{
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string db = ConfigurationManager.ConnectionStrings["shopConn"].ConnectionString;
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string p_name = ConfigurationManager.ConnectionStrings["shopConn"].ProviderName;
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//ProviderName
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MyWeb.sql sql = new MyWeb.sql();
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OleDbConnection sqlConn = new OleDbConnection(db);
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OleDbCommand sqlCmd = null;
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OleDbDataAdapter sqlAdapter = null;
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DataSet ds = null;
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string strOrderBy = null;
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try
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{
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sqlConn.Open();
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if (sqlConn.State == ConnectionState.Open)
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{
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ds = new DataSet();
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// SELECT SQL 的 WHERE 條件 (包含使用者輸入的模糊查詢關鍵字)
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if (string.IsNullOrEmpty(sqlWhere))
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{
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// 若沒加這句，則當 WHERE 條件為空值時(使用者未輸入搜尋關鍵字)，丟到 Stored Procedure 裡後會 Error
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sqlWhere = " 1=1 ";
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}
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sqlCmd = new OleDbCommand("dbo.pager_eztrust", sqlConn);
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// 系統中每支程式共用的預存程序名稱
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sqlCmd.CommandType = CommandType.StoredProcedure;
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// 資料來源為 Stored Procedure(預存程序)
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sqlCmd.Parameters.Add(new OleDbParameter("@StartRowIndex", startRowIndex));
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// 目前頁面，要撈的資料，的第一筆資料的索引 (第一筆為 0，依序加 1，依此類推)
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sqlCmd.Parameters.Add(new OleDbParameter("@PageSize", maxinumRows));
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// 每頁要顯示的資料筆數
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sqlCmd.Parameters.Add(new OleDbParameter("@tableName", tableName + " "));
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sqlCmd.Parameters.Add(new OleDbParameter("@columnName", columnName));
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sqlCmd.Parameters.Add(new OleDbParameter("@sqlWhere", sqlWhere));
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sqlCmd.Parameters.Add(new OleDbParameter("@orderBy", sort));
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sqlCmd.Parameters.Add(new OleDbParameter("@rowCount", SqlDbType.Int));
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// Stored Procedure 會傳回一個數字(符合查詢條件的資料總筆數)
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sqlCmd.Parameters["@rowCount"].Direction = ParameterDirection.Output;
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// 用來在 GridView 下方的「頁碼列」顯示頁碼之用(Ex: 1 2 3 4 ... 55)
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sqlAdapter = new OleDbDataAdapter(sqlCmd);
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sqlAdapter.Fill(ds);
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int totalRecords = Convert.ToInt32(sqlCmd.Parameters["@rowCount"].Value);
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// 回傳回來的總筆數
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HttpContext.Current.Session["s_RecordTotalCount"] = totalRecords;
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// 存至 Session，以便在.aspx.vb中取用後
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}
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}
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catch (OleDbException ex)
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{
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Console.WriteLine(ex.ToString());
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throw;
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}
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catch (Exception ex)
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{
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throw new Exception("發生 SqlClient 以外的資料庫錯誤: " + ex.Message);
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}
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finally
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{
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sqlCmd.Dispose();
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sqlAdapter.Dispose();
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ds.Dispose();
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if (sqlConn.State == ConnectionState.Open)
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{
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sqlConn.Close(); sqlConn.Dispose();
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}
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sqlConn.Dispose();
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}
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return ds;
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}
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}
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}
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namespace Cus_SQL
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{
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#region 將查詢的sql陣列組成字串傳回
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public class SQL_Array
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{
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public string sql_str(ArrayList fs)
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{
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string functionReturnValue = null;
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for (int i = 0; i <= fs.Count - 1; i++)
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{
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if (functionReturnValue != null)
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{ functionReturnValue += " AND "; }
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functionReturnValue += fs[i];
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}
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return functionReturnValue;
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}
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}
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#endregion
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}
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