c# - 如何将数据库数据格式化为excel同一行c#

Question

这是我在数据库中的表

使用此表，它将使用以下格式导出到 Excel，其中具有相同 case_id 的记录将导出到 Excel 中的同一行

Desired Output

我正在努力解决如何使数据库中的数据显示在 Excel 的同一行相同 case_id

这是我当前正在处理的 Excel 片段

这是我的 C# 代码

public string DB_CONN =
  ConfigurationManager.ConnectionStrings["constr"].ConnectionString;

    protected void Page_Load(object sender, EventArgs e)
    {
        getAll();
    }


    protected void getAll()
    {

        DateTime dTime = DateTime.Now;
        string now_time = dTime.ToString("yyyy-MM-dd HH:mm:ss");
        string sql = "";
        MySqlConnection conn = null;
        MySqlDataAdapter msda = null;
        DataSet ds = null;

        string id = "ALL";

        sql = "SELECT * FROM testing";


        conn = new MySqlConnection(DB_CONN);
        conn.Open();

        msda = new MySqlDataAdapter(sql, conn);
        ds = new DataSet();
        msda.Fill(ds, "charge");

        using (ExcelPackage p = new ExcelPackage())
        {
            ExcelWorksheet worksheet = p.Workbook.Worksheets.Add("收入報表");

            int row = 1;

            //Add the headers

            worksheet.Cells[row, 1].Value = "date";
            worksheet.Cells[row, 2].Value = "heading";
            worksheet.Cells[row, 3].Value = "detail";
            worksheet.Cells[row, 4].Value = "heading";
            worksheet.Cells[row, 5].Value = "detail";
            worksheet.Cells[row, 6].Value = "heading";
            worksheet.Cells[row, 7].Value = "detail";


            for (int i = 0; i < ds.Tables["charge"].Rows.Count; i++)
            {

                ++row;
                int k = 0;
                worksheet.Cells[row, ++k].Value = ds.Tables["charge"].Rows[i]["date"].ToString();


                worksheet.Cells[row, ++k].Value = ds.Tables["charge"].Rows[i]["heading"].ToString();
                worksheet.Cells[row, ++k].Value = ds.Tables["charge"].Rows[i]["detail"].ToString();
                worksheet.Cells[row, ++k].Value = ds.Tables["charge"].Rows[i]["case_id"].ToString();

            }


            String exportFileName = "income_report_" + "_" + ".xlsx";

            Byte[] fileBytes = p.GetAsByteArray(); //Read the Excel file in a byte array

            //Clear the response
            Response.ClearHeaders();
            Response.ClearContent();
            Response.Clear();


            Response.AddHeader("Content-Disposition", "attachment;filename=" + exportFileName + "; "

            );
            Response.ContentType = "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";

            Response.BinaryWrite(fileBytes);
            Response.End();
            Response.Flush();
            Response.Close();
        }

    }

Answer 1

检查上一行是否具有相同的案例 ID，并碰撞列而不是碰撞行。

var lastColumn;
var row = 0;
for (var i = 0; i < ds.Tables["charge"].Rows.Count; i++)
{
    if (i != 0 && ds.Tables["charge"].Rows[i]["case_id"].ToString() == ds.Tables["charge"].Rows[i - 1]["case_id"].ToString())
    {
        worksheet.Cells[row, lastColumn++] = ds.Tables["charge"].Rows[i]["heading"].ToString();
        worksheet.Cells[row, lastColumn++] = ds.Tables["charge"].Rows[i]["detail"].ToString();
        continue;
    }
    row++;
    worksheet.Cells[row, 1] = ds.Tables["charge"].Rows[i]["date"].ToString();
    worksheet.Cells[row, 2] = ds.Tables["charge"].Rows[i]["heading"].ToString();
    worksheet.Cells[row, 3] = ds.Tables["charge"].Rows[i]["detail"].ToString();
    lastColumn = 3;
}