c# - 如何加快两个循环的进程

Question

我写了一个应用程序来生成一个excel报告。此报告有 120 多列和 100 行。我唯一需要打印的是针对分销商的产品数量。产品打印为列，分销商打印为行。

以下是我的完整代码。

代码形式

custoMeth cls = new custoMeth();

        //Clear
        drill.Clear();
        distTbl.Clear();
        monthList.Clear();

        //Declarations
        divCode = int.Parse(cmbDivCode.SelectedItem.ToString());
        catName = cmbCategory.SelectedItem.ToString();
        distName = cmbDistributor.SelectedItem.ToString();
        fromDT = dtFrom.Text.ToString();
        toDT = dtTo.Text.ToString();

        monthList = cls.monthsList(this.dtFrom, this.dtTo);

        string month = cls.selectedmonth(this.dtFrom);

        // load excel, and create a new workbook
        Microsoft.Office.Interop.Excel.Application Excel = new Microsoft.Office.Interop.Excel.Application();
        Excel.Workbooks.Add();

        // single worksheet
        Microsoft.Office.Interop.Excel._Worksheet Worksheet = Excel.ActiveSheet;

        // Custom Header
        Worksheet.Range[Worksheet.Cells[1, 1], Worksheet.Cells[1, 8]].Merge();
        Worksheet.Range[Worksheet.Cells[1, 1], Worksheet.Cells[2, 8]].Merge();
        Worksheet.Range[Worksheet.Cells[3, 1], Worksheet.Cells[3, 3]].Merge();
        cls.excelHeader(Worksheet, 3, 1, "Generated Date : " + System.DateTime.Today.ToShortDateString() + "", true, "none", "Left", "none", 0);

        Worksheet.Range[Worksheet.Cells[4, 1], Worksheet.Cells[4, 3]].Merge();
        cls.excelHeader(Worksheet, 4, 1, "Sound And FreeIssue Report (Division Code : " + divCode + ")", true, "none", "Left", "none", 0);

        Worksheet.Range[Worksheet.Cells[5, 1], Worksheet.Cells[5, 3]].Merge();
        cls.excelHeader(Worksheet, 5, 1, ("Report Date: " + fromDT + " To " + toDT), true, "none", "Left", "none", 0);

        Worksheet.Range[Worksheet.Cells[6, 1], Worksheet.Cells[6, 3]].Merge();
        cls.excelHeader(Worksheet, 6, 1, "Category: " + catName + "", true, "none", "Left", "none", 0);

        cls.excelHeader(Worksheet, 8, 1, "Distributor", true, "none", "Left", "none", 20);

        int row = 8;
        int col = 2;

        #region Print Product Names
        if (catName == "All")
        {
            //sqlData = "SELECT DISTINCT Commission, ProductName FROM Drill INNER JOIN Product ON Drill.Commission = Product.CommissionCode AND Drill.DivCode = Product.DivCode ";
            //sqlData = sqlData + "WHERE TRMM = '" + month + "' AND Drill.DivCode = '" + divCode + "' AND Commission NOT IN ('xxx') ORDER BY Commission";

            sqlData = "SELECT DISTINCT Commission FROM Drill WHERE TRMM = '" + month + "' AND Drill.DivCode = '" + divCode + "' ORDER BY Commission";
            comTBL = cls.data(sqlData, myConnection, comTBL);
            prBar.Maximum = comTBL.Rows.Count;

            for (int i = 0; i < comTBL.Rows.Count; i++)
            {
                string sqlPrd = "SELECT ProductName FROM Product WHERE CommissionCode = '" + comTBL.Rows[i]["Commission"].ToString() + "' AND DivCode = '" + divCode + "'";
                string productName = cls.GetValue<string>(sqlPrd, myConnection);
                cls.excelHeader(Worksheet, row, col, productName, true, "none", "none", "Bottom", 5, 90); //comTBL.Rows[i]["ProductName"].ToString()

                col = col + 1;
                prBar.Value = i;
            }
        }
        else
        {
            sqlData = "SELECT DISTINCT Commission FROM Drill WHERE RCateg = '" + catName + "' AND TRMM = '" + month + "' ORDER BY Commission";
            comTBL = cls.data(sqlData, myConnection, comTBL);
            prBar.Maximum = comTBL.Rows.Count;
            for (int i = 0; i < comTBL.Rows.Count; i++)
            {
                string sqlPrd = "SELECT ProductName FROM Product WHERE CommissionCode = '" + comTBL.Rows[i]["Commission"].ToString() + "' AND DivCode = '" + divCode + "'";
                string productName = cls.GetValue<string>(sqlPrd, myConnection);
                cls.excelHeader(Worksheet, row, col, productName, true, "none", "none", "Bottom", 5, 90);

                col = col + 1;
                prBar.Value = i;
            }
        }
        #endregion

        row = 9;
        col = 1;

        #region Distributor
        if (cmbDistributor.SelectedItem.ToString() == "All")
        {
            string sqlDist = "SELECT DISTINCT StkCd FROM Drill WHERE DivCode = '" + divCode + "' AND TRMM = '" + month + "'";
            distTbl = cls.data(sqlDist, myConnection, distTbl);
        }
        else
        {
            string sqlDistCode = "SELECT Code FROM Distributors WHERE Name = '" + distName + "' AND Active IN ('True') AND  DivCode = '" + divCode + "'";
            distCode = cls.GetValue<string>(sqlDistCode, myConnection);
            string sqlDist = "SELECT DISTINCT StkCd FROM Drill WHERE DivCode = '" + divCode + "' AND  StkCd = '" + distCode + "' AND TRMM = '" + month + "'";
            distTbl = cls.data(sqlDist, myConnection, distTbl);
        }
        #endregion

        prBar.Value = 0;
        prBar.Maximum = distTbl.Rows.Count;

        for (int j = 0; j < distTbl.Rows.Count; j++)
        {
            col = 1;

            string sqlDistName = "SELECT Name FROM Distributors WHERE Active IN ('True') AND Code = '" + distTbl.Rows[j]["StkCd"].ToString() + "' AND DivCode = '" + divCode + "'";
            distName = cls.GetValue<string>(sqlDistName, myConnection);
            cls.excelHeader(Worksheet, row, col, distName, true, "none", "Left", "none", 20);

            col = 2;
            prBar1.Maximum = comTBL.Rows.Count;

            for (int p = 0; p < comTBL.Rows.Count; p++)
            {
                sqlDmg = "SELECT StkCd, SUM(Qty) AS Qty FROM Drill ";
                sqlDmg = sqlDmg + "WHERE StkCd = '" + distTbl.Rows[j]["StkCd"].ToString() + "' AND TRMM = '" + month + "' AND Commission = '" + comTBL.Rows[p]["Commission"].ToString() + "' AND PrtID IN ('D') AND DivCode = '" + divCode + "'";
                sqlDmg = sqlDmg + "GROUP BY StkCd";

                drill = cls.data(sqlDmg, myConnection, drill);
                int qty = 0;
                if (drill.Rows.Count > 0)
                { qty = int.Parse(drill.Rows[0]["Qty"].ToString()); }
                else
                { qty = 0; }
                qty = (qty * -1);
                cls.excelHeader(Worksheet, row, col, qty);
                col = col + 1;
                prBar1.Value = p;
            }

            row = row + 1;
            prBar.Value = j;
        }

        Excel.Visible = true;

.cls 文件

public void excelHeader(Microsoft.Office.Interop.Excel._Worksheet Worksheet, int row, int column, string value, Boolean bold, string size, string hAlign, string vAlign, int colWidth, int orientation)
    {
        Worksheet.Cells[row, column].Value = value;
        Worksheet.Cells[row, column].Font.Bold = bold;

        if (size != "none")
        { Worksheet.Cells[row, column].Font.Size = size; }

        if (colWidth != 0)
        { Worksheet.Columns[column].ColumnWidth = colWidth; }

        if (hAlign == "Left")
        { Worksheet.Cells[row, column].HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignLeft; }
        else if (hAlign == "Center")
        { Worksheet.Cells[row, column].HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter; }
        else if (hAlign == "Right")
        { Worksheet.Cells[row, column].HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignRight; }
        else
        { Worksheet.Cells[row, column].HorizontalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignGeneral; }

        if (vAlign == "Left")
        { Worksheet.Cells[row, column].VerticalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignLeft; }
        else if (vAlign == " Center")
        { Worksheet.Cells[row, column].VerticalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignCenter; }
        else if (vAlign == "Right")
        { Worksheet.Cells[row, column].VerticalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignRight; }
        else
        { Worksheet.Cells[row, column].VerticalAlignment = Microsoft.Office.Interop.Excel.XlHAlign.xlHAlignGeneral; }

        Worksheet.Cells[row, column].Orientation = orientation;

    }

public DataTable data(string sql, SqlConnection conn, DataTable dt)
    {
        dt.Clear();
        SqlCommand queryCommand = new SqlCommand(sql, conn);
        SqlDataAdapter adapter = new SqlDataAdapter(queryCommand);
        adapter.Fill(dt);

        return dt;
    }

此代码正在运行，但需要花费太多时间。有时它会给我错误“超时已过期。在完成之前超时时间已过或服务器没有响应”请帮助。谢谢你。

标签： c#excelfor-loop