Web(Asp.net,c#) ผมใช้ Tools ของ Devexpress gridview ผมต้องการ Upload file image เก็บข้อมูลเข้า database เป็น path ต้องทำยังไงครับ

<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="panContent.ascx.cs" Inherits="AssetAdmin.admMaterial.panContent" %>

<asp:SqlDataSource ID="SqlDataSource1" runat="server"
    ConnectionString="<%$ ConnectionStrings:assetConnectionString %>" SelectCommand="SELECT * FROM [material] ORDER BY [m_id]"></asp:SqlDataSource>

<dx:ASPxGridView ID="grid" runat="server" AutoGenerateColumns="False" Width="100%" DataSourceID="SqlDataSource1"
    KeyFieldName="m_id" OnRowInserting="grid_RowInserting" OnRowDeleting="grid_RowDeleting" OnRowUpdating="grid_RowUpdating">

    <Columns>
        <dx:GridViewCommandColumn ShowNewButtonInHeader="true" ShowEditButton="true" ShowDeleteButton="true" VisibleIndex="0" />
        <dx:GridViewDataTextColumn FieldName="m_id" Caption="รหัส" VisibleIndex="1" />
        <dx:GridViewDataTextColumn FieldName="m_name" Caption="ชื่อครุภัณฑ์" VisibleIndex="2" />
        <dx:GridViewDataTextColumn FieldName="m_price" Caption="ราคา" VisibleIndex="3" />
        <dx:GridViewDataTextColumn FieldName="m_quantity" Caption="จำนวน" VisibleIndex="4" />
        <dx:GridViewDataTextColumn FieldName="m_unit" Caption="หน่วยนับ" VisibleIndex="5" />
        <dx:GridViewDataComboBoxColumn FieldName="c_id" Caption="หมวดหมู่" VisibleIndex="6">
            <PropertiesComboBox>
                <Items>
                    <dx:ListEditItem Value="A" Text="สำนักงานตึก80" />
                    <dx:ListEditItem Value="B" Text="กองพัฒ" />
                </Items>
            </PropertiesComboBox>
        </dx:GridViewDataComboBoxColumn>
        <dx:GridViewDataTextColumn FieldName="m_purchaser" Caption="ผู้จัดซื้อ" VisibleIndex="7" />
        <dx:GridViewDataDateColumn FieldName="m_buydate" Caption="วันที่ซื้อ" VisibleIndex="8" />
        <dx:GridViewDataTextColumn FieldName="m_buyplace" Caption="สถานที่ซื้อ" VisibleIndex="9" />
        <dx:GridViewDataTextColumn FieldName="m_recorder" Caption="ผู้บันทึกข้อมูล" VisibleIndex="10" />
        <dx:GridViewDataDateColumn FieldName="m_datesave" Caption="วันที่บันทึก" VisibleIndex="11" />
        <dx:GridViewDataTextColumn FieldName="m_address" Caption="ที่อยู่ปัจจุบัน" VisibleIndex="12" />
        <dx:GridViewDataComboBoxColumn FieldName="s_id" Caption="สถานะ" VisibleIndex="13">
            <PropertiesComboBox>
                <Items>
                    <dx:ListEditItem Value="1" Text="เบิกได้" />
                    <dx:ListEditItem Value="2" Text="งดเบิก" />
                </Items>
            </PropertiesComboBox>
        </dx:GridViewDataComboBoxColumn>
        <dx:GridViewDataTextColumn FieldName="m_note" Caption="หมายเหตุ" VisibleIndex="14" />

        <!--ส่วนของการ upload file image -->
        <dx:GridViewDataBinaryImageColumn FieldName="pic_id" Caption="รูปภาพ" VisibleIndex="15">
            <PropertiesBinaryImage ImageHeight="170px" ImageWidth="160px">
                <EditingSettings Enabled="true" UploadSettings-UploadValidationSettings-MaxFileSize="4194304" />
            </PropertiesBinaryImage>
        </dx:GridViewDataBinaryImageColumn>
        <!--จบส่วนของการ upload file image -->

    </Columns>
    <Settings ShowPreview="true" />
    <SettingsPager PageSize="10" />
    <EditFormLayoutProperties ColCount="3">
        <Items>
            <dx:GridViewColumnLayoutItem ColumnName="m_id">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="m_name">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="m_price">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="m_quantity">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="m_unit">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="c_id">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="m_purchaser">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="m_buydate">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="m_buyplace">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="m_recorder">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="m_datesave">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="m_address">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="s_id">
            </dx:GridViewColumnLayoutItem>
            <dx:GridViewColumnLayoutItem ColumnName="m_note" ColSpan="2">
            </dx:GridViewColumnLayoutItem>

            <!--ส่วนของการ upload file image -->
            <dx:GridViewColumnLayoutItem ColumnName="pic_id" RowSpan="4" ShowCaption="False" HelpText="Maximum fils size is 4MB." Width="180px" />
            <!--จบส่วนของการ upload file image -->


            <dx:EditModeCommandLayoutItem ColSpan="3" HorizontalAlign="Right" />
        </Items>
    </EditFormLayoutProperties>
    <SettingsPager EnableAdaptivity="true" />
    <SettingsSearchPanel Visible="true" />
</dx:ASPxGridView>

Code (C#)

using System;
using System.Collections.Generic;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using DevExpress.Web;


namespace AssetAdmin.admMaterial
{
    public partial class panContent : System.Web.UI.UserControl
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }
        //Insert
        protected void grid_RowInserting(object sender, DevExpress.Web.Data.ASPxDataInsertingEventArgs e)
        {
            if (sender is ASPxGridView s)
            {
                string colsList = string.Empty; //colsList = "m_id,m_name";
                string colsValue = string.Empty; //colsValue = "123345,'Hello'";


                foreach (GridViewColumn gc in s.Columns)
                {
                    if (gc is GridViewDataColumn gd)
                    {
                        if (string.IsNullOrWhiteSpace(gd.FieldName) == false)
                        {
                            var colName = gd.FieldName; //m_name
                            var colValue = e.NewValues[colName]; //'Hello' //ค่าใหม่

                            //Convert String,Date
                            if (colsList != string.Empty)
                            {
                                colsList += ",";
                            }
                            colsList += colName;

                            if (colsValue != string.Empty)
                            {
                                colsValue += ",";
                            }
                            if (colName == "m_id" || colName == "m_name" || colName == "m_price" | colName == "m_quantity" || colName == "m_unit" || colName == "c_id" || colName == "m_purchaser" || colName == "m_buyplace" || colName == "m_recorder" || colName == "m_address" || colName == "s_id" || colName == "m_note" || colName == "pic_id")

                            {
                                colValue = "'" + colValue + "'";
                            }



                            else if (colName == "m_buydate" || colName == "m_datesave")
                            {
                                if (colValue is DateTime colDate)//เก็บเวลาปัจจุบัน
                                {
                                    colValue = "Convert(datetime, '" + colDate.Year + "-" + colDate.Month + "-" + colDate.Day + "')";
                                }
                                else
                                {
                                    Console.Write("Con't connect Datetime");
                                }
                            }
                            colsValue += colValue;
                        }
                    }
                }

                string conn = "Data Source=localhost;Initial Catalog=asset;Integrated Security=True;";
                using (SqlConnection myCon = new SqlConnection(conn))
                {
                    myCon.Open();
                    string sql = @"INSERT INTO material (" + colsList + ")values(" + colsValue + ")";
                    using (SqlCommand cmd = new SqlCommand(sql, myCon))
                    {
                        cmd.ExecuteNonQuery();
                    }
                }
                e.Cancel = true;
            }
        }

        //Delete
        protected void grid_RowDeleting(object sender, DevExpress.Web.Data.ASPxDataDeletingEventArgs e)
        {
            if (sender is ASPxGridView s)
            {
                string colsList = string.Empty;
                string colsValue = string.Empty;


                foreach (GridViewColumn gc in s.Columns)
                {
                    if (gc is GridViewDataColumn gd)
                    {
                        if (string.IsNullOrWhiteSpace(gd.FieldName) == false)
                        {
                            var m_id = gd.FieldName;
                            var colValue = e.Values[m_id];//ค่าเก่า
                        }
                    }
                }

                string conn = "Data Source=localhost;Initial Catalog=asset;Integrated Security=True;";
                using (SqlConnection myCon = new SqlConnection(conn))
                {
                    myCon.Open();
                    string sql = @"DELETE FROM material WHERE m_id = " + e.Values["m_id"] + "";
                    using (SqlCommand cmd = new SqlCommand(sql, myCon))
                    {
                        cmd.ExecuteNonQuery();
                    }
                }
                e.Cancel = true;
            }
        }

        //Update
        protected void grid_RowUpdating(object sender, DevExpress.Web.Data.ASPxDataUpdatingEventArgs e)
        {
            if (sender is ASPxGridView s)
            {
                string colsList = string.Empty;
                string colsValue = string.Empty;

                foreach (GridViewColumn gc in s.Columns)
                {
                    if (gc is GridViewDataColumn gd)
                    {
                        if (string.IsNullOrWhiteSpace(gd.FieldName) == false)
                        {
                            var colName = gd.FieldName;
                            var colValue = e.NewValues[colName];

                            //Convert String,Date
                            if (colsList != string.Empty)
                            {
                                colsList += ",";
                            }
                            colsList += colName;

                            if (colsValue != string.Empty)
                            {
                                colsValue += ",";
                            }
                            if (colName == "m_id" || colName == "m_name" || colName == "m_price" | colName == "m_quantity" || colName == "m_unit" || colName == "c_id" || colName == "m_purchaser" || colName == "m_buyplace" || colName == "m_recorder" || colName == "m_address" || colName == "s_id" || colName == "m_note" || colName == "pic_id")

                            {
                                colValue = "'" + colValue + "'";
                            }
                            else if (colName == "m_buydate" || colName == "m_datesave")
                            {
                                if (colValue is DateTime colDate)//เก็บเวลาปัจจุบัน
                                {
                                    colValue = "Convert(datetime, '" + colDate.Year + "-" + colDate.Month + "-" + colDate.Day + "')";
                                }
                                else
                                {
                                    Console.Write("Con't connect Datetime");
                                }
                            }
                            colsValue += colValue;
                        }
                    }
                }

                string conn = "Data Source=localhost;Initial Catalog=asset;Integrated Security=True;";
                using (SqlConnection myCon = new SqlConnection(conn))
                {

                    myCon.Open();
                    var m_brydate = string.Empty;
                    if (e.NewValues["m_buydate"] is DateTime date1)
                    {
                        m_brydate = "Convert(datetime, '" + date1.Year + "-" + date1.Month + "-" + date1.Day + "')";
                    }
                    else
                    {
                        m_brydate = "null";
                    }

                    var m_datesave = string.Empty;
                    if (e.NewValues["m_buydate"] is DateTime date2)
                    {
                        m_datesave = "Convert(datetime, '" + date2.Year + "-" + date2.Month + "-" + date2.Day + "')";
                    }
                    else
                    {
                        m_datesave = "null";
                    }
                    string sql = @"UPDATE material SET m_id ='" + e.NewValues["m_id"]
                        + "',m_name ='" + e.NewValues["m_name"]
                        + "',m_price = '" + e.NewValues["m_price"]
                        + "',m_quantity = '" + e.NewValues["m_quantity"]
                        + "',m_unit = '" + e.NewValues["m_unit"]
                        + "',c_id = '" + e.NewValues["c_id"]
                        + "',m_purchaser = '" + e.NewValues["m_purchaser"]
                        + "',m_buydate =" + m_brydate
                        + ",m_buyplace = '" + e.NewValues["m_buyplace"]
                        + "',m_recorder = '" + e.NewValues["m_recorder"]
                        + "',m_datesave = " + m_datesave
                        + ",m_address = '" + e.NewValues["m_address"]
                        + "',s_id = '" + e.NewValues["s_id"]
                        + "',m_note = '" + e.NewValues["m_note"]
                        + "',pic_id = '" + e.NewValues["pic_id"]
                        + "' WHERE m_id = " + e.NewValues["m_id"] + "";

                    using (SqlCommand cmd = new SqlCommand(sql, myCon))
                    {
                        cmd.ExecuteNonQuery();
                    }
                }
                e.Cancel = true;
            }


        }
    }
}