Datatable數據導出到 Excel（CSV）文件中

核心代碼部分

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace ExportAlarmDataToExcel
{
    public partial class Form1 : Form
    {
        private static readonly SqlConnection sqlConnection = new SqlConnection();
        private DataTable tBSystemAlarm = null;
        private bool isExporting = false;
        public Form1()
        {
            InitializeComponent();
            this.FormClosed += (s, e) =>
            {
                sqlConnection.Close();
            };
        }

        /// <summary>
        /// 登陸數據庫
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnLoginDB_Click(object sender, EventArgs e)
        {
            if (sqlConnection.State == ConnectionState.Open)
            {
                return;
            }
            string dataSource = txtIP.Text.Trim();
            string userId = txtUserName.Text.Trim();
            string password = txtPassword.Text.Trim();
            if (string.IsNullOrEmpty(dataSource))
            {
                return;
            }
            if (string.IsNullOrEmpty(userId))
            {
                return;
            }

            if (string.IsNullOrEmpty(password))
            {
                return;
            }

            if (Open(dataSource, userId, password))
            {
                tBSystemAlarm = new DataTable();
                try
                {
                    FillData(tBSystemAlarm);
                    int count = tBSystemAlarm.Rows.Count;
                    txtLog.Text += $"時間：{DateTime.Now} => 獲取數據成功，總共包含到 {count} 條記錄！\r\n";
                    if (count > 0)
                        this.btnExport.Visible = true;
                }
                catch (Exception ex)
                {
                    txtLog.Text += $"時間：{DateTime.Now} => 獲取數據異常，請聯繫管理員！\r\n";
                }
            }
        }
        /// <summary>
        /// 獲取數據表 TB_System_Alarm 的全部信息
        /// </summary>
        /// <returns></returns>
        private void FillData(DataTable tBSystemAlarm)
        {
            SqlCommand sqlCommand = new SqlCommand("SELECT 	CreateTime,DeviceId,ChannelId,AlarmLevel,AlarmTypeName,Possibility,Center,Longitude,Latitude,Width,CreateDate,Stadus,Timestamp,Remark,Display,Discribe FROM TB_System_Alarm");
            sqlCommand.Connection = sqlConnection;
            SqlDataAdapter sqlDataAdapter = new SqlDataAdapter(sqlCommand);
            sqlDataAdapter.Fill(tBSystemAlarm);
        }

        private void ExportToExcel()
        {
            Thread thread = new Thread(new ThreadStart(() =>
            {
                using (StreamWriter sw = new StreamWriter(File.Create(this.saveFileDialog1.FileName), Encoding.UTF8))
                {
                    StringBuilder csvHeader = new StringBuilder();

                    for (int h = 0; h < this.tBSystemAlarm.Columns.Count; h++)
                    {
                        csvHeader.Append(',');
                        csvHeader.Append(this.tBSystemAlarm.Columns[h].Caption);
                    }
                    sw.WriteLine(csvHeader);
                    for (int r = 0; r < this.tBSystemAlarm.Rows.Count; r++)
                    {
                        StringBuilder csvBody = new StringBuilder();
                        DataRow row = this.tBSystemAlarm.Rows[r];
                        for (int c = 0; c < this.tBSystemAlarm.Columns.Count; c++)
                        {
                            csvBody.Append(',');
                            csvBody.Append(row[c]);
                        }
                        sw.WriteLine(csvBody);
                        SetProcess($"已導出 {r + 1} 條警報數據！");
                    }
                }
                SetProcess("已全部導出！");
            }));
            thread.Start();
        }

        private void SetProcess(string messageText)
        {
            if (this.InvokeRequired)
            {
                this.Invoke(new Action(() =>
                {
                    this.btnExport.Text = messageText;
                }));
            }
            else
            {
                this.btnExport.Text = messageText;
            }
        }

        private bool Open(string dataSource, string userId, string password)
        {
            sqlConnection.ConnectionString = $"Data Source={dataSource};Initial Catalog=monitoring;User Id={userId};Password={password}";
            try
            {
                sqlConnection.Open();
                return true;
            }
            catch (Exception ex)
            {
                MessageBox.Show("數據庫鏈接錯誤，請確認您輸入的信息是否正確，並且檢查網絡是否配置正常，數據庫遠程服務是否啓動！", "錯誤", MessageBoxButtons.OK, MessageBoxIcon.Error);
                return false;
            }
        }

        private void btnExport_Click(object sender, EventArgs e)
        {
            this.btnExport.Enabled = false;
            //this.saveFileDialog1.Filter = "(*.xls)|*.xls|(*.xlsx)|*.xlsx";
            this.saveFileDialog1.Filter = "(*.csv)|*.csv";
            string fileName = this.saveFileDialog1.FileName;
            this.saveFileDialog1.ShowDialog();
            ExportToExcel();
        }
    }
}

WindowsForm UI設計器代碼

namespace ExportAlarmDataToExcel
{
    partial class Form1
    {
        /// <summary>
        /// 必需的設計器變量。
        /// </summary>
        private System.ComponentModel.IContainer components = null;

        /// <summary>
        /// 清理所有正在使用的資源。
        /// </summary>
        /// <param name="disposing">如果應釋放託管資源，爲 true；否則爲 false。</param>
        protected override void Dispose(bool disposing)
        {
            if (disposing && (components != null))
            {
                components.Dispose();
            }
            base.Dispose(disposing);
        }

        #region Windows 窗體設計器生成的代碼

        /// <summary>
        /// 設計器支持所需的方法 - 不要修改
        /// 使用代碼編輯器修改此方法的內容。
        /// </summary>
        private void InitializeComponent()
        {
            this.btnLoginDB = new System.Windows.Forms.Button();
            this.label1 = new System.Windows.Forms.Label();
            this.txtIP = new System.Windows.Forms.TextBox();
            this.txtUserName = new System.Windows.Forms.TextBox();
            this.label2 = new System.Windows.Forms.Label();
            this.txtPassword = new System.Windows.Forms.TextBox();
            this.label3 = new System.Windows.Forms.Label();
            this.txtLog = new System.Windows.Forms.TextBox();
            this.btnExport = new System.Windows.Forms.Button();
            this.saveFileDialog1 = new System.Windows.Forms.SaveFileDialog();
            this.SuspendLayout();
            // 
            // btnLoginDB
            // 
            this.btnLoginDB.Font = new System.Drawing.Font("微軟雅黑", 26.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.btnLoginDB.Location = new System.Drawing.Point(13, 193);
            this.btnLoginDB.Name = "btnLoginDB";
            this.btnLoginDB.Size = new System.Drawing.Size(525, 54);
            this.btnLoginDB.TabIndex = 0;
            this.btnLoginDB.Text = "登陸";
            this.btnLoginDB.UseVisualStyleBackColor = true;
            this.btnLoginDB.Click += new System.EventHandler(this.btnLoginDB_Click);
            // 
            // label1
            // 
            this.label1.AutoSize = true;
            this.label1.Font = new System.Drawing.Font("微軟雅黑", 26.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.label1.Location = new System.Drawing.Point(5, 17);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(230, 46);
            this.label1.TabIndex = 1;
            this.label1.Text = "服務器地址：";
            // 
            // txtIP
            // 
            this.txtIP.Font = new System.Drawing.Font("微軟雅黑", 26.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.txtIP.Location = new System.Drawing.Point(235, 13);
            this.txtIP.MaxLength = 64;
            this.txtIP.Name = "txtIP";
            this.txtIP.Size = new System.Drawing.Size(303, 54);
            this.txtIP.TabIndex = 2;
            this.txtIP.Text = ".\\SQLEXPRESS";
            // 
            // txtUserName
            // 
            this.txtUserName.Font = new System.Drawing.Font("微軟雅黑", 26.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.txtUserName.Location = new System.Drawing.Point(235, 73);
            this.txtUserName.MaxLength = 32;
            this.txtUserName.Name = "txtUserName";
            this.txtUserName.Size = new System.Drawing.Size(303, 54);
            this.txtUserName.TabIndex = 4;
            this.txtUserName.Text = "sa";
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Font = new System.Drawing.Font("微軟雅黑", 26.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.label2.Location = new System.Drawing.Point(75, 77);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(160, 46);
            this.label2.TabIndex = 3;
            this.label2.Text = "用戶名：";
            // 
            // txtPassword
            // 
            this.txtPassword.Font = new System.Drawing.Font("微軟雅黑", 26.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.txtPassword.Location = new System.Drawing.Point(235, 133);
            this.txtPassword.MaxLength = 32;
            this.txtPassword.Name = "txtPassword";
            this.txtPassword.PasswordChar = '$';
            this.txtPassword.Size = new System.Drawing.Size(303, 54);
            this.txtPassword.TabIndex = 6;
            // 
            // label3
            // 
            this.label3.AutoSize = true;
            this.label3.Font = new System.Drawing.Font("微軟雅黑", 26.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.label3.Location = new System.Drawing.Point(110, 137);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(125, 46);
            this.label3.TabIndex = 5;
            this.label3.Text = "密碼：";
            // 
            // txtLog
            // 
            this.txtLog.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
            this.txtLog.Font = new System.Drawing.Font("微軟雅黑", 15.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.txtLog.ForeColor = System.Drawing.SystemColors.MenuHighlight;
            this.txtLog.Location = new System.Drawing.Point(13, 253);
            this.txtLog.Multiline = true;
            this.txtLog.Name = "txtLog";
            this.txtLog.ReadOnly = true;
            this.txtLog.Size = new System.Drawing.Size(525, 227);
            this.txtLog.TabIndex = 7;
            // 
            // btnExport
            // 
            this.btnExport.Font = new System.Drawing.Font("微軟雅黑", 26.25F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));
            this.btnExport.Location = new System.Drawing.Point(12, 486);
            this.btnExport.Name = "btnExport";
            this.btnExport.Size = new System.Drawing.Size(526, 54);
            this.btnExport.TabIndex = 8;
            this.btnExport.Text = "導出數據到EXCEL";
            this.btnExport.UseVisualStyleBackColor = true;
            this.btnExport.Visible = false;
            this.btnExport.Click += new System.EventHandler(this.btnExport_Click);
            // 
            // Form1
            // 
            this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);
            this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
            this.ClientSize = new System.Drawing.Size(554, 548);
            this.Controls.Add(this.btnExport);
            this.Controls.Add(this.txtLog);
            this.Controls.Add(this.txtPassword);
            this.Controls.Add(this.label3);
            this.Controls.Add(this.txtUserName);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.txtIP);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.btnLoginDB);
            this.Name = "Form1";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "將警報數據導出到EXCEL";
            this.ResumeLayout(false);
            this.PerformLayout();

        }

        #endregion

        private System.Windows.Forms.Button btnLoginDB;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.TextBox txtIP;
        private System.Windows.Forms.TextBox txtUserName;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.TextBox txtPassword;
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.TextBox txtLog;
        private System.Windows.Forms.Button btnExport;
        private System.Windows.Forms.SaveFileDialog saveFileDialog1;
    }
}