如何使用c#将Winform下DataGridView中内容导出到Excel

Question

如题所述

Answer 1

C#操作EXCEL全解（代码）

提示：运行之前必须先引用Interop.Excel.dll模块

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Data.OleDb;
using System.Windows.Forms;
using System.Reflection;
using Excel;

namespace AnalysisSystem.DB
{

public class ExcelOperation

{

PRivate string _fileName;//保存路径名

public ExcelOperation(string fileName)

{

_fileName = fileName;

}

private OleDbConnection GetConnection()
{
string connectString = string.Format("Provider=Microsoft.Jet.OLEDB.4.0;Data Source={0};Extended Properties=Excel 8.0",_fileName);
OleDbConnection myConn = new OleDbConnection(connectString);//建立链接
return myConn;
}

public System.Data.DataTable ExecuteTableResult(string strSql)
{
System.Data.DataTable dt = new System.Data.DataTable();
try
{
OleDbConnection conn = this.GetConnection();
OleDbDataAdapter da = new OleDbDataAdapter(strSql, conn);//执行相关SQL语句
da.Fill(dt);
}
catch (System.Exception ex)
{
//do nothing
}
return dt;
}

public DataSet ExecuteSetResult(string strSql,string table_name)
{

DataSet ds = new DataSet();
string temp_name = "[" + table_name + "$]";
try
{
OleDbConnection conn = this.GetConnection();
OleDbDataAdapter da = new OleDbDataAdapter(strSql, conn);
da.Fill(ds,temp_name);
}
catch (System.Exception ex)
{
//do nothing
}
return ds;
}

public string ExecuteOneResult(string strSql)
{
string result = "";
System.Data.DataTable dt = new System.Data.DataTable();
try
{
OleDbConnection conn = this.GetConnection();
OleDbDataAdapter da = new OleDbDataAdapter(strSql, conn);
da.Fill(dt);
}
catch (System.Exception ex)
{
//do nothing
}
if (dt != null && dt.Rows.Count > 0)
{
result = dt.Rows[0][0].ToString();
}
return result;
}

public void ExecuteNonResult(string strSql)
{
try
{
OleDbConnection conn = this.GetConnection();
OleDbCommand cmd = new OleDbCommand(strSql, conn);
cmd.ExecuteNonQuery();
}
catch (System.Exception ex)
{
//do nothing
}
}

private _Workbook W_B(Excel.application app)
{
Workbooks workbooks = app.Workbooks;
_Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);
return workbook;
}
private _Worksheet W_S(_Workbook work_book)
{
Sheets sheets = work_book.Worksheets;
_Worksheet worksheet = (_Worksheet)sheets.get_Item(1);//获取选择第一个表，本身默认名称为Sheet1
return worksheet;
}
//从DataGridView中导出数据到Excel表,单表导出
public void Excel_out(DataGridView dataGridView1)
{
//建立Excel对象
Excel.Application app = new Excel.Application();
try
{
_Workbook workbook = this.W_B(app);
_Worksheet worksheet = this.W_S(workbook);

string sLen = "";
//取得最后一列列名
char H = (char)(64 + dataGridView1.ColumnCount / 26);
char L = (char)(64 + dataGridView1.ColumnCount % 26);
if (dataGridView1.ColumnCount < 26)
{
sLen = L.ToString();
}
else
{
sLen = H.ToString() + L.ToString();
}

//标题
string sTmp = sLen + "1";
Range ranCaption = worksheet.get_Range(sTmp, "A1");
string[] asCaption = new string[dataGridView1.ColumnCount];
for (int i = 0; i < dataGridView1.ColumnCount; i++)
{
asCaption[i] = dataGridView1.Columns[i].HeaderText;
}
ranCaption.Value2 = asCaption;
//数据
object[] obj = new object[dataGridView1.Columns.Count];
for (int r = 0; r < dataGridView1.RowCount - 1; r++)
{
for (int l = 0; l < dataGridView1.Columns.Count; l++)
{
if (dataGridView1[l, r].ValueType == typeof(DateTime))
{
obj[l] = dataGridView1[l, r].Value.ToString();
}
else
{
obj[l] = dataGridView1[l, r].Value;
}
}
string cell1 = sLen + ((int)(r + 2)).ToString();
string cell2 = "A" + ((int)(r + 2)).ToString();
Range ran = worksheet.get_Range(cell1, cell2);
ran.Value2 = obj;
}
//保存
workbook.SaveCopyAs(this._fileName);
workbook.Saved = true;
}
finally
{
//关闭
app.UserControl = false;
app.Quit();
}
}

/// <summary>
/// 多表导出
/// </summary>
/// <param name="dataGridView">DataGridView列表集合</param>
/// <param name="TableList">表名称集合</param>
public void Excel_out_MulTable(List<DataGridView> dataGridView, string[] TableList)
{
//建立Excel对象
Excel.Application app = new Excel.Application();
try
{
Workbooks workbooks = app.Workbooks;//定义一个工作簿集合
_Workbook workbook = workbooks.Add(XlWBATemplate.xlWBATWorksheet);//向工作簿添加一个新工作簿

Sheets sheets = workbook.Worksheets;//定义一个工作表集合
_Worksheet worksheet ;
int wnumber = 0;
while (wnumber++ < (TableList.GetLength(0) - 1))
{
sheets.Add(Missing.Value, Missing.Value, Missing.Value, Missing.Value);//向一个工作表集合添加一个新工作表
}

/*提醒：Missing类为命名空间System.Reflection中的类，所以记得引入*/

wnumber = 0;
foreach (DataGridView dataGridView1 in dataGridView)
{

worksheet = null;
worksheet = (_Worksheet)sheets.get_Item(wnumber + 1);//取出需要进行操作的工作表
worksheet.Name = TableList[wnumber];//设置改工作表名称
if (wnumber != 0)
sheets.Select(wnumber);//选中操作表

string sLen = "";
//取得最后一列列名
char H = (char)(64 + dataGridView1.ColumnCount / 26);
char L = (char)(64 + dataGridView1.ColumnCount % 26);
if (dataGridView1.ColumnCount < 26)
{
sLen = L.ToString();
}
else
{
sLen = H.ToString() + L.ToString();
}

//标题
string sTmp = sLen + "1";
Range ranCaption = worksheet.get_Range(sTmp, "A1");
string[] asCaption = new string[dataGridView1.ColumnCount];
for (int i = 0; i < dataGridView1.ColumnCount; i++)
{
asCaption[i] = dataGridView1.Columns[i].HeaderText;
}
ranCaption.Value2 = asCaption;
//数据
object[] obj = new object[dataGridView1.Columns.Count];
for (int r = 0; r < dataGridView1.RowCount - 1; r++)
{
for (int l = 0; l < dataGridView1.Columns.Count; l++)
{
if (dataGridView1[l, r].ValueType == typeof(DateTime))
{
obj[l] = dataGridView1[l, r].Value.ToString();
}
else
{
obj[l] = dataGridView1[l, r].Value;
}
}
string cell1 = sLen + ((int)(r + 2)).ToString();
string cell2 = "A" + ((int)(r + 2)).ToString();
Range ran = worksheet.get_Range(cell1, cell2);//设置单元格
ran.Value2 = obj;

}
wnumber++;
}
//保存
workbook.SaveCopyAs(this._fileName);
workbook.Saved = true;
}
finally
{
//关闭
app.UserControl = false;
app.Quit();
}

}

}

}