Web.config配置数据库(Excel导入导出举例)

Code

<connectionStrings>

<!-- SQL connection string for Inventory database lookup -->

<add name="SQLConnetionString" connectionString="server=(local);user id=sa;password=;database=OfficeAutoDB;min pool size=4;max pool size=4;packet size=3072" providerName="System.Data.SqlClient"/>

<add name="ConnectionStr" connectionString="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:\实例\OfficeAutoDB\App_Data\area.mdb" providerName="System.Data.OleDb" />

</connectionStrings>

<appSettings>

<add key="DSExcel" value="Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Data Source="></add>

<add key="Excel" value="App_Data\excel.xls"></add>

<add key="OleConnection" value ="Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:\实例\OfficeAutoDB\App_Data\area.mdb"></add>

<add key="FileService.WebService" value="http://localhost:1052/OfficeAutoDB/WebService.asmx%22/>

</appSettings>

读取配置:

private readonly string DSExcel = ConfigurationSettings.AppSettings["DSExcel"].ToString();

private readonly string Excel = ConfigurationSettings.AppSettings["Excel"].ToString();

public static string sqlcon = ConfigurationManager.ConnectionStrings["SQLConnetionString"].ToString();

-----------------------------------------------------------------------------------------

//导入到Excel

private void Export(string FileType, string FileName)

{

Response.Charset = "GB2312";

Response.ContentEncoding = System.Text.Encoding.UTF7;

Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, Encoding.UTF8).ToString());

Response.ContentType = FileType;

this.EnableViewState = false;

StringWriter tw = new StringWriter();

HtmlTextWriter hw = new HtmlTextWriter(tw);

GridView1.RenderControl(hw);

Response.Write(tw.ToString());

Response.End();

}

protected void Button1_Click(object sender, EventArgs e)

{

Export("application/ms-excel", "文件上传.xls");

}

//如果没有下面方法会报错类型“GridView”的控件“GridView1”必须放在具有 runat=server 的窗体标记内

public override void VerifyRenderingInServerForm(Control control)

{

}

//读取Excel数据

private DataSet CreateDataSource()

{

string strCon = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("~\\App_Data\\excel.xls") + ";Extended Properties=Excel 8.0 ;";

OleDbConnection olecon = new OleDbConnection(strCon);

// string ExcelDbPath = DSExcel + Server.MapPath(Excel) + ";";

// OleDbConnection olecon = new OleDbConnection(ExcelDbPath);

OleDbDataAdapter myda = new OleDbDataAdapter("SELECT * FROM [Sheet1$]", olecon);

DataSet myds = new DataSet();

myda.Fill(myds);

return myds;

}

//生成Excel表格

/* private void CreateExcelTable()

{

DataSet ds = GetDataSet();

//创建Excel对象

Excel.Application excel = new Excel.Application();

int rowIndex = 1;

int collIndex = 0;

//添加Excel对象的WorkBooks

excel.Application.Workbooks.Add(true);

DataTable table = ds.Tables[0];

//将所得到的表的列名赋给Excel单元格

foreach (DataColumn col in table.Columns)

{//添加列名

collIndex++;

excel.Cells[1, collIndex] = col.ColumnName;

}

foreach (DataRow row in table.Rows)

{//添加数据

rowIndex++;

collIndex = 0;

foreach (DataColumn col in table.Columns)

{

collIndex++;

excel.Cells[rowIndex, collIndex] = row[col.ColumnName].ToString();

}

}

//不可见即后台处理

excel.Visible = false;

excel.DisplayAlerts = false;

//保存刚才创建的Excel表格

excel.Save(MapPath("App_Data/excel.xls"));

excel.Application.Workbooks.Close();

excel.Application.Quit();

excel.Quit();

//释放使用的Excel对象

System.Runtime.InteropServices.Marshal.ReleaseComObject(excel);

GC.Collect();//调用垃圾收集内存

}

*/

}