asp. net implements the method of importing data from DataTable to Excel file and creating tables
- 2021-07-10 19:24:11
- OfStack
This article illustrates how asp. net can import data from DataTable to Excel files and create tables. Share it for your reference, as follows:
/// <summary>
/// Putting data from DataTable Import to Excel In the file
/// </summary>
/// <param name="dataTable"> Data source </param>
/// <param name="AbsoluteExcelFilePath">Excel Absolute path of file </param>
/// <param name="TblColName">TBL The corresponding column name in the </param>
/// <param name="ColumnName">Excel The corresponding column name in the </param>
/// <returns> Successful operation returned True, Failure return False</returns>
public static bool ExportDataToExcel(DataTable dataTable, string AbsoluteExcelFilePath, string[] TblColName, string[] ColumnName)
{
int k = 0;
if (dataTable == null) return false;
OleDbConnection Conn = new OleDbConnection();
try
{
string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + AbsoluteExcelFilePath + ";Mode=Share Deny None;Extended Properties=Excel 8.0;Jet OLEDB:Create System Database=True";
Conn = new OleDbConnection(strConn);
Conn.Open();
OleDbCommand command = Conn.CreateCommand();
string strSQL = "";
if (dataTable.Columns != null)
{
// Table building
strSQL = "CREATE TABLE " + dataTable.TableName + "(";
for (int i = 0; i < ColumnName.Length; i++)
{
strSQL += ColumnName[i] + " TEXT,";
}
strSQL = strSQL.Substring(0, strSQL.Length - 1);
strSQL += ")";
command.CommandText += strSQL;
command.ExecuteNonQuery();
if (dataTable.Rows.Count > 0)
{
// Import data
foreach (DataRow row in dataTable.Rows)
{
strSQL = "insert into " + dataTable.TableName + "(";
for (k = 0; k < TblColName.Length; k++)
{
strSQL += ColumnName[k] + ",";
}
strSQL = strSQL.Substring(0, strSQL.Length - 1);
strSQL += ") values( ";
for (k = 0; k < TblColName.Length; k++)
{
strSQL += "'" + row[TblColName[k]] + "',";
}
strSQL = strSQL.Substring(0, strSQL.Length - 1);
strSQL += ")";
command.CommandText = strSQL;
command.ExecuteNonQuery();
}
}
}
}
catch (Exception ex)
{
Conn.Close();
throw new Exception(ex.Message);
return false;
}
Conn.Close();
return true;
}
Invoke the method:
DataSet ds = (DataSet)Session["listMobile"];// Get the value of the table to export
if (ds.Tables[0].Rows.Count <= 0)
{
Page.RegisterStartupScript("", "<mce:script type="text/javascript"><!--
alert(' You can't export without content! ')
// --></mce:script>");
}
else
{
//EXCEL Name of the page
string[] tableName = { "["+DateTime.Now.ToString("yyyyMMddhhmmss")+"]" };
string fileName = tools.CreateID() + ".xls";
string filePath = Server.MapPath("..//DownloadFiles//" + fileName);
if (tools.ExportDataToExcel(ds, filePath, tableName)==true)
{
Response.Clear();
Response.Buffer = true;
Response.Charset = "GB2312";
Response.AppendHeader("Content-Disposition", "attachment;filename=" + fileName);
Response.ContentType = "application/vnd.ms-excel";
this.EnableViewState = false;
Response.WriteFile(filePath);
Response.Flush();
if (System.IO.File.Exists(filePath)) System.IO.File.Delete(filePath);
Response.Redirect(this.Request.UrlReferrer.AbsoluteUri, true);
Response.End();
}
}
I hope this article is helpful to everyone's asp. net programming.