导出时：引用 using Excel = Microsoft.Office.Interop.Excel;

 

 

 

 

 

#region 读取excel

//打开方法

public DataTable ExceltoDataSet(string path)

{

string strConn = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=" + path + ";Extended Properties='Excel 12.0;HDR=Yes;IMEX=1';";

OleDbConnection conn = new OleDbConnection(strConn);

conn.Open();

System.Data.DataTable schemaTable = conn.GetOleDbSchemaTable(System.Data.OleDb.OleDbSchemaGuid.Tables, null);

string tableName = schemaTable.Rows[0][2].ToString().Trim();

string strExcel = "";

OleDbDataAdapter myCommand = null;

DataSet ds = null;

strExcel = "Select * From [" + tableName + "]";

myCommand = new OleDbDataAdapter(strExcel, strConn);

ds = new DataSet();

myCommand.Fill(ds, tableName);

System.Data.DataTable dt = ds.Tables[0];

return dt;

}

#endregion

#region 导出excel

/// <summary>

/// 将数据表保存到Excel表格中

/// </summary>

/// <param name="addr">Excel表格存放地址（程序运行目录后面的部分）</param>

/// <param name="dt">要输出的DataTable</param>

public void SaveToExcel(string addr, System.Data.DataTable dt, string sheetName)

{

//0.注意：

// * Excel中形如Cells[x][y]的写法，前面的数字是列，后面的数字是行!

// * Excel中的行、列都是从1开始的，而不是0

//1.制作一个新的Excel文档实例

Excel::Application xlsApp = new Excel::Application();

xlsApp.Workbooks.Add(true);

/* 示例输入：需要注意Excel里数组以1为起始（而不是0）

* for (int i = 1; i < 10; i++)

* {

* for (int j = 1; j < 10; j++)

* {

* xlsApp.Cells[i][j] = "-";

* }

* }

*/

//2.设置Excel分页卡标题

xlsApp.ActiveSheet.Name = sheetName;

//3.合并第一行的单元格

string temp = "";

if (dt.Columns.Count < 26)

{

temp = ((char)('A' + dt.Columns.Count)).ToString();

}

else if (dt.Columns.Count <= 26 + 26 * 26)

{

temp = ((char)('A' + (dt.Columns.Count - 26) / 26)).ToString()

+ ((char)('A' + (dt.Columns.Count - 26) % 26)).ToString();

}

else throw new Exception("列数过多");

Excel::Range range = xlsApp.get_Range("A1", temp + "1");

//range.ClearContents(); //清空要合并的区域

//range.MergeCells = true; //合并单元格

4.填写第一行：表名，对应DataTable的TableName

//xlsApp.Cells[1][1] = dt.TableName;

//xlsApp.Cells[1][1].Font.Name = "黑体";

//xlsApp.Cells[1][1].Font.Size = 25;

//xlsApp.Cells[1][1].Font.Bold = true;

//xlsApp.Cells[1][1].HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;//居中

//xlsApp.Rows[1].RowHeight = 60; //第一行行高为60（单位：磅）

5.合并第二行单元格，用于书写表格生成日期

//range = xlsApp.get_Range("A2", temp + "2");

//range.ClearContents(); //清空要合并的区域

//range.MergeCells = true; //合并单元格

6.填写第二行：生成时间

//xlsApp.Cells[1][2] = "报表生成于：" + DateTime.Now.ToString();

//xlsApp.Cells[1][2].Font.Name = "宋体";

//xlsApp.Cells[1][2].Font.Size = 15;

xlsApp.Cells[1][2].HorizontalAlignment = 4;//右对齐

//xlsApp.Cells[1][2].HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;//居中

//xlsApp.Rows[2].RowHeight = 30; //第一行行高为60（单位：磅）

//7.填写各列的标题行

xlsApp.Cells[1][1] = "ID";

for (int i = 0; i < dt.Columns.Count; i++)

{

xlsApp.Cells[i + 2][1] = dt.Columns[i].ColumnName;

}

xlsApp.Rows[1].Font.Name = "宋体";

xlsApp.Rows[1].Font.Size = 15;

xlsApp.Rows[1].Font.Bold = true;

//xlsApp.Rows[1].HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;//居中

设置颜色

//range = xlsApp.get_Range("A3", temp + "3");

//range.Interior.ColorIndex = 33;

//8.填写DataTable中的数据

for (int i = 0; i < dt.Rows.Count; i++)

{

xlsApp.Cells[1][i + 2] = (i + 1).ToString();

for (int j = 0; j < dt.Columns.Count; j++)

{

xlsApp.Cells[j + 2][i + 2] = dt.Rows[i][j];

}

}

range = xlsApp.get_Range("A4", temp + (dt.Rows.Count + 1).ToString());

//range.Interior.ColorIndex = 37;

//range.HorizontalAlignment = Excel.XlVAlign.xlVAlignCenter;

9.描绘边框

//range = xlsApp.get_Range("A1", temp + (dt.Rows.Count + 1).ToString());

//range.Borders.LineStyle = 1;

//range.Borders.Weight = 3;

//10.打开制作完毕的表格

//xlsApp.Visible = true;

//11.保存表格到根目录下指定名称的文件中

xlsApp.ActiveWorkbook.SaveAs(addr);

xlsApp.Quit();

xlsApp = null;

GC.Collect();

}

#endregion