Excel导入导出数据库

protected string col;//数据库表名

#region 导入按钮事件
protected void BtnUpload_Click(object sender, EventArgs e)
{
string filename = string.Empty;
try
{
filename = UploadXml(FileExcel);
ImportXlsToData(filename);//将XLS文件的数据导入数据库
if (filename != string.Empty && System.IO.File.Exists(filename))
{
System.IO.File.Delete(filename);//删除上传的XLS文件
}
LblMessage.Text = "数据导入成功！";
System.IO.File.Delete(filename);//删除上传的XLS文件
}
catch (Exception ex)
{
LblMessage.Text = ex.Message;
}
}
#endregion

#region 上传Excel文件
/// <summary>
/// 上传Excel文件
/// </summary>
/// <param name="inputfile">上传的控件名</param>
protected string UploadXml(System.Web.UI.HtmlControls.HtmlInputFile inputfile)
{
string orifilename = string.Empty;
string uploadfilepath = string.Empty;
string modifyfilename = string.Empty;
string fileExtend = "";//文件扩展名
int fileSize = 0;//文件大小
try
{
if (inputfile.Value != string.Empty)
{
//得到文件的大小
fileSize = inputfile.PostedFile.ContentLength;
if (fileSize == 0)
{
throw new Exception("导入的Excel文件大小为0，请检查是否正确！");
}
//得到扩展名
fileExtend = inputfile.Value.Substring(inputfile.Value.LastIndexOf(".") + 1);
if (fileExtend.ToLower() != "xls")
{
throw new Exception("你选择的文件格式不正确，只能导入EXCEL文件！");
}
//路径
uploadfilepath = Server.MapPath("~/Service/GraduateChannel/GraduateApply/ImgUpLoads");
//新文件名
modifyfilename = System.Guid.NewGuid().ToString();
modifyfilename += "." + inputfile.Value.Substring(inputfile.Value.LastIndexOf(".") + 1);
//判断是否有该目录
System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(uploadfilepath);
if (!dir.Exists)
{
dir.Create();
}
orifilename = uploadfilepath + "//" + modifyfilename;
//如果存在,删除文件
if (File.Exists(orifilename))
{
File.Delete(orifilename);
}
//上传文件
inputfile.PostedFile.SaveAs(orifilename);
}
else
{
throw new Exception("请选择要导入的Excel文件!");
}
}
catch (Exception ex)
{
throw ex;
}
return orifilename;
}
#endregion

#region 插入数据
public void Add(DataSet ds)
{
col = this.RadioList.SelectedValue;
int ii = ds.Tables[0].Columns.Count;
string sql = "select top "+ii+" name from dbo.syscolumns where id = object_id(N'" + col + "')";
DataTable dt = dbc.GetDataTableBySql(sql);
StringBuilder strSql = new StringBuilder();
for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
{
strSql.Append("insert into " + col + "(");
for (int j = 0; j < dt.Rows.Count; j++)
{
if (j == dt.Rows.Count - 1)
{
strSql.Append("" + dt.Rows[j][0].ToString() + "");
}
else
{
strSql.Append("" + dt.Rows[j][0].ToString() + ",");
}
}
strSql.Append(")");
strSql.Append("values");
strSql.Append("(");
for (int a = 0; a < ii; a++)
{
if (a == ii - 1)
{
strSql.Append("'" + ds.Tables[0].Rows[i][a].ToString() + "'");
}
else
{
strSql.Append("'" + ds.Tables[0].Rows[i][a].ToString() + "',");
}
}
strSql.Append(")");
}
dbc.ExecuteSql(strSql.ToString());
}
#endregion

#region 将Dataset的数据导入数据库
/// <summary>
/// 将Dataset的数据导入数据库
/// </summary>
/// <param name="pds">数据集</param>
/// <param name="Cols">数据集列数</param>
/// <returns></returns>
private bool AddDatasetToSQL(DataSet pds, int Cols)
{
int ic, ir;
ic = pds.Tables[0].Columns.Count;
if (pds.Tables[0].Columns.Count < Cols)
{
throw new Exception("导入Excel格式错误！Excel只有" + ic.ToString() + "列");
}
ir = pds.Tables[0].Rows.Count;
if (pds != null && pds.Tables[0].Rows.Count > 0)
{
Add(pds);
}
else
{
throw new Exception("导入数据为空！");
}
return true;
}
#endregion

#region 从excel中提取数据——dataset中
/// <summary>
/// 从excel中提取数据——dataset中
/// </summary>
/// <param name="fileName"></param>
private void ImportXlsToData(string fileName)
{
try
{
col = this.RadioList.SelectedValue;
if (fileName == string.Empty)
{
throw new ArgumentNullException("Excel文件上传失败！");
}
string oleDBConnString = string.Empty;
oleDBConnString = "Provider=Microsoft.Jet.OLEDB.4.0;";
oleDBConnString += "Data Source=";
oleDBConnString += fileName;
oleDBConnString += ";Extended Properties=Excel 8.0;";
OleDbConnection oleDBConn = null;
OleDbDataAdapter oleAdMaster = null;
DataTable m_tableName = new DataTable();
DataSet ds = new DataSet();
oleDBConn = new OleDbConnection(oleDBConnString);
oleDBConn.Open();
m_tableName = oleDBConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);

if (m_tableName != null && m_tableName.Rows.Count > 0)
{

m_tableName.TableName = m_tableName.Rows[0]["TABLE_NAME"].ToString();

}
string sqlMaster;
sqlMaster = " SELECT * FROM [" + m_tableName.TableName + "]";
oleAdMaster = new OleDbDataAdapter(sqlMaster, oleDBConn);
oleAdMaster.Fill(ds, "m_tableName");
oleAdMaster.Dispose();
oleDBConn.Close();
oleDBConn.Dispose();
string sql = "select count(*) from syscolumns where id = object_id( '"+col+"' )";
int i = dbc.ExecuteSql(sql);
AddDatasetToSQL(ds, i);

}
catch (Exception ex)
{
throw ex;
}
}
#endregion

#region 导出按钮事件，查询条件可以添加
protected void BtnDownload_Click(object sender, EventArgs e)
{
string sql = "select * from "+col+"";
//if (this.keyword.Text.Trim() != "")
//{
// this.keyword.Text = this.keyword.Text.Trim().Replace("'", "");
// sql += " where patindex('%" + this.keyword.Text + "%',username)>0";
//}
//if (pubfun.IsBlank(dgInfo.Sort))
//{
// sql += " Order By addTime DESC";
//}
//else
//{
// sql += " Order By " + dgInfo.Sort + " " + DataGridSortType;
//}
DataTable dt = this.dbc.GetDataTableBySql(sql);
//this.TotalRecords = dt.Rows.Count;
this.DataGrid1.DataSource = dt;
this.DataGrid1.DataBind();
dt.Dispose();

this.DataGrid1.Visible = true;
if (this.DataGrid1.Items.Count == 0)
{
pubfun.Alert("对不起,没有查询到任何记录,不能导出数据!", -1);
return;
}
else
{
Response.Clear();
Response.Buffer = true;
Response.Charset = "GB2312";
Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode("Temp.xls"));
Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");//设置输出流为简体中文
// Response.ContentEncoding = System.Text.Encoding.UTF8;
Response.ContentType = "application/ms-excel";//设置输出文件类型为excel文件。
this.EnableViewState = false;
System.Globalization.CultureInfo myCItrad = new System.Globalization.CultureInfo("ZH-CN", true);
System.IO.StringWriter oStringWriter = new System.IO.StringWriter(myCItrad);
System.Web.UI.HtmlTextWriter oHtmlTextWriter = new System.Web.UI.HtmlTextWriter(oStringWriter);
this.DataGrid1.RenderControl(oHtmlTextWriter);
Response.Write(oStringWriter.ToString());
Response.End();
}
}
#endregion