Export DataSet To Multiple Excel Sheets And Download Into A Zip File Using C#?
Jan 21, 2011how to Export DataSet to Multiple Excel Sheets and download those file into a zip in C# asp.net?
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Apr 2, 2010In C# ASP.NET 3.5 web application, I need to export multiple datatables (or a dataset) to an Excel 2007 file with multiple sheets, and then provide the user with 'Open/Save' dialog box, WITHOUT saving the Excel file on the web server.
I have used Excel Interop before. I have been reading that it's not efficient and is not the best approach to achieve this and there are more ways to do it, 2 of them being: 1) Converting data in datatables to an XML string that Excel understands 2) Using OPEN XML SDK 2.0.
It looks like OPEN XML SDK 2.0 is better, please let me know. Are there any other ways to do it? I don't want to use any third-party tools.
If I use OPEN XML SDK, it creates an excel file, right? I don't want to save it on the (Windows 2003) server hard drive (I don't want to use Server.MapPath, these Excel files are dynamically created, and they are not required on the server, once client gets them). I directly want to prompt the user to open/save it. I know how to do it when the 'XML string' approach is used.
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[Code]....
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Protected Sub btnExportExcel_Click(ByVal sender As Object, ByVal e As EventArgs)
Dim ars_stock As New DataTable
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Response.Clear()
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[Code] ....
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Oct 19, 2010I have a lot of excel sheets which columns are slightly different, i want to import all of these sheets (one at a time) into ONE SQL TABLE. I'll give an example : Say ive written the required program and called it Excel2sql converter. So Excel2sql takes an excel sheet and create a database table with the data of that excel sheet, For example say i have the following excel sheet:
Excel_Sheet_1
-----------------------------
FirstName MiddleName LastName
John A. Smith
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FirstName MiddleName LastName
John A. Smith
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C# - EXPORT Dataset To EXCEL
Feb 12, 2011I am using the following code to export fields from a database table into excel. What I want to do is be able to write a SQL statement to retrieve fields from multiple tables and export them into excel. This code only allows me to export one table. Also, how can I display a save prompt dialog?
protected void export_Click(object sender, EventArgs e)
{
string sql = null;
string data = null;
string path = save_as.Text;
int i = 0;
int j = 0;
Excel.Application xlApp;
Excel.Workbook xlWorkBook;
Excel.Worksheet xlWorkSheet;
object misValue = System.Reflection.Missing.Value;
xlApp = new Excel.ApplicationClass();
xlWorkBook = xlApp.Workbooks.Add(misValue);
xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
//connectionString = "data source=servername;initial catalog=databasename;user id=username;password=password;";
SqlConnection cnn = new SqlConnection(GetConnectionString());
cnn.Open();
sql = "SELECT Story, CreationDate FROM Story";
SqlDataAdapter dscmd = new SqlDataAdapter(sql, cnn);
DataSet ds = new DataSet();
dscmd.Fill(ds);
for (i = 0; i <= ds.Tables[0].Rows.Count - 1; i++)
{
for (j = 0; j <= ds.Tables[0].Columns.Count - 1; j++)
{
data = ds.Tables[0].Rows[i].ItemArray[j].ToString();
xlWorkSheet.Cells[i + 1, j + 1] = data;
}
}
xlWorkBook.SaveAs(path+".xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
xlWorkBook.Close(true, misValue, misValue);
xlApp.Quit();
releaseObject(xlWorkSheet);
releaseObject(xlWorkBook);
releaseObject(xlApp);
//MessageBox.Show("Excel file created , you can find the file c:\csharp.net-informations.xls");
}
private void releaseObject(object obj)
{
try
{
System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
obj = null;
}
catch (Exception ex)
{
obj = null;
//MessageBox.Show("Exception Occured while releasing object " + ex.ToString());
}
finally
{
GC.Collect();
}
}
Web Forms :: Export A Big Dataset To Excel Via Web?
Feb 24, 2010Actually I have a SQL query that a user exports to excel in our web server. I did it in c# with Visual Studio 2003 (.Net v1.1): I get the data from a SQL server into a Dataset, then with this method I create the XLS file:
private void ExportAsExcelFile ( DataSet dtExport )
{
Response.Clear() ;
Response.ContentType = "application/vnd.ms-excel";
Response.ContentEncoding = System.Text.Encoding.UTF8 ;
Response.Charset = string.Empty ;
Response.AddHeader ( "Content-Disposition", "attachment;filename=data.xls" ) ;
System.IO.StringWriter objStringWriter = new StringWriter () ;
System.Web.UI.HtmlTextWriter objHtmlTextWriter = new System.Web.UI.HtmlTextWriter(objStringWriter) ;
DataGrid objDatagrid = new DataGrid () ;
objDatagrid.DataSource = dtExport ;
objDatagrid.DataBind () ;
objDatagrid.RenderControl ( objHtmlTextWriter ) ;
Response.Write (objStringWriter.ToString()) ;
Response.End () ;
}
Well, this works when the SQL query has 10.000 rows and so on. But now the query has more than 200.000 rows, and I´m getting a TimeOut Error trying to export the data. I read about generate this big files with a Store Procedure and the SQL Commad: BCP [URL], but I tryed and it fails. I have no permissions to execute this command. Is there any other way to export this SQL data to Excel via a ASPX page?
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Jul 12, 2012I need to give users of my asp.net/vb.net web application the ability to click a button which will then send them an e-mail with the contents of a SQL query attached as an Excel e-mail attachment.
I can manage all of this apart from getting the contents of a VB dataset object into an Excel file on my server.
I know how to export a gridview to Excel at the client end, but my boss has been adamant that he wants the button to send an e-mail with the results attached - I have no need to display a gridview at all.
How to export the contents of a datareader or dataset directly into an Excel file at the server side?
Forms Data Controls :: Download - Export To Excel
Jan 19, 2010I have written code to export to excel as below:
View 2 RepliesWeb Forms :: Export The Dataset Values Into Excel In Application
Mar 9, 2011I am trying to Export the dataset values into Excel in my application, its working for first time. Again if i click the export button [second time] the button does't cause postback and the entire page is not postback.
View 4 RepliesC# - Numbers Are Converted As Text When Export Dataset To Excel
Jul 8, 2010Iam exporting dataset to excel , the numbers on the sheet shown as text when export it to excel. Here is the code:
public class Excel
{
const int rowLimit = 65000;
private static string getWorkbookTemplate()
{
StringBuilder sb = new StringBuilder(818);
sb.AppendFormat(@"<?xml version=""1.0""?>{0}", Environment.NewLine);
sb.AppendFormat(@"<?mso-application progid=""Excel.Sheet""?>{0}", Environment.NewLine);
sb.AppendFormat(@"<Workbook xmlns=""urn:schemas-microsoft-com:office:spreadsheet""{0}", Environment.NewLine);
sb.AppendFormat(@" xmlns:o=""urn:schemas-microsoft-com:office:office""{0}", Environment.NewLine);
sb.AppendFormat(@" xmlns:x=""urn:schemas-microsoft-com:office:excel""{0}", Environment.NewLine);
sb.AppendFormat(@" xmlns:ss=""urn:schemas-microsoft-com:office:spreadsheet""{0}", Environment.NewLine);
sb.AppendFormat(@" xmlns:html=""[URL]
sb.AppendFormat(@" <Styles>{0}", Environment.NewLine);
sb.AppendFormat(@" <Style ss:ID=""Default"" ss:Name=""Normal"">{0}", Environment.NewLine);
sb.AppendFormat(@" <Alignment ss:Vertical=""Bottom""/>{0}", Environment.NewLine);
sb.AppendFormat(@" <Borders/>{0}", Environment.NewLine);
sb.AppendFormat(@" <Font ss:FontName=""Verdana"" x:Family=""Swiss"" ss:Size=""12"" ss:Color=""#0000A0""/>{0}", Environment.NewLine);
sb.AppendFormat(@" <Interior/>{0}", Environment.NewLine);
sb.AppendFormat(@" <NumberFormat/>{0}", Environment.NewLine);
sb.AppendFormat(@" <Protection/>{0}", Environment.NewLine);
sb.AppendFormat(@" </Style>{0}", Environment.NewLine);
sb.AppendFormat(@" <Style ss:ID=""s62"">{0}", Environment.NewLine);
sb.AppendFormat(@" <Font ss:FontName=""Calibri"" x:Family=""Swiss"" ss:Size=""11"" ss:Color=""#000000""{0}", Environment.NewLine);
sb.AppendFormat(@" ss:Bold=""1""/>{0}", Environment.NewLine);
sb.AppendFormat(@" </Style>{0}", Environment.NewLine);
sb.AppendFormat(@" <Style ss:ID=""s63"">{0}", Environment.NewLine);
sb.AppendFormat(@" <NumberFormat ss:Format=""Short Date""/>{0}", Environment.NewLine);
sb.AppendFormat(@" </Style>{0}", Environment.NewLine);
sb.AppendFormat(@" </Styles>{0}", Environment.NewLine);
sb.Append(@"{0}
</Workbook>");
return sb.ToString();
}
private static string replaceXmlChar(string input)
{
input = input.Replace("&", "&");
input = input.Replace("<", "<");
input = input.Replace(">", ">");
input = input.Replace(""", """);
input = input.Replace("'", "'");
return input;
}
private static string getCell(Type type, object cellData)
{
Object data = (cellData is DBNull) ? "" : cellData;
if (type.Name.Contains("Int") || type.Name.Contains("Double") || type.Name.Contains("Decimal")) return string.Format("<Cell><Data ss:Type="Number">{0}</Data></Cell>", data);
if (type.Name.Contains("Date") && data.ToString() != string.Empty)
{
return string.Format("<Cell ss:StyleID="s63"><Data ss:Type="DateTime">{0}</Data></Cell>", Convert.ToDateTime(data).ToString("yyyy-MM-dd"));
}
return string.Format("<Cell><Data ss:Type="String">{0}</Data></Cell>", replaceXmlChar(data.ToString()));
}
private static string getWorksheets(DataSet source)
{
StringWriter sw = new StringWriter();
if (source == null || source.Tables.Count == 0)
{
sw.Write("<Worksheet ss:Name="Sheet1">
<Table>
<Row><Cell><Data ss:Type="String"></Data></Cell></Row>
</Table>
</Worksheet>");
return sw.ToString();
}
foreach (DataTable dt in source.Tables)
{
if (dt.Rows.Count == 0)
sw.Write("<Worksheet ss:Name="" + replaceXmlChar(dt.TableName) + "">
<Table>
<Row><Cell ss:StyleID="s62"><Data ss:Type="String"></Data></Cell></Row>
</Table>
</Worksheet>");
else
{
//write each row data
int sheetCount = 0;
for (int i = 0; i < dt.Rows.Count; i++)
{
if ((i % rowLimit) == 0)
{
//add close tags for previous sheet of the same data table
if ((i / rowLimit) > sheetCount)
{
sw.Write("
</Table>
</Worksheet>");
sheetCount = (i / rowLimit);
}
sw.Write("
<Worksheet ss:Name="" + replaceXmlChar(dt.TableName) +
(((i / rowLimit) == 0) ? "" : Convert.ToString(i / rowLimit)) + "">
<Table>");
//write column name row
sw.Write("
<Row>");
foreach (DataColumn dc in dt.Columns)
sw.Write(string.Format("<Cell ss:StyleID="s62"><Data ss:Type="String">{0}</Data></Cell>", replaceXmlChar(dc.ColumnName)));
sw.Write("</Row>");
}
sw.Write("
<Row>");
foreach (DataColumn dc in dt.Columns)
sw.Write(getCell(dc.DataType, dt.Rows[i][dc.ColumnName]));
sw.Write("</Row>");
}
sw.Write("
</Table>
</Worksheet>");
}
}
return sw.ToString();
}
public static string GetExcelXml(DataTable dtInput, string filename)
{
string excelTemplate = getWorkbookTemplate();
DataSet ds = new DataSet();
ds.Tables.Add(dtInput.Copy());
string worksheets = getWorksheets(ds);
string excelXml = string.Format(excelTemplate, worksheets);
return excelXml;
}
public static string GetExcelXml(DataSet dsInput, string filename)
{
string excelTemplate = getWorkbookTemplate();
string worksheets = getWorksheets(dsInput);
string excelXml = string.Format(excelTemplate, worksheets);
return excelXml;
}
public static void ToExcel(DataSet dsInput, string filename, HttpResponse response)
{
string excelXml = GetExcelXml(dsInput, filename);
response.Clear();
response.AppendHeader("Content-Type", "application/vnd.ms-excel");
response.AppendHeader("Content-disposition", "attachment; filename=" + filename);
response.Write(excelXml);
response.Flush();
response.End();
}
public static void ToExcel(DataTable dtInput, string filename, HttpResponse response)
{
DataSet ds = new DataSet();
ds.Tables.Add(dtInput.Copy());
ToExcel(ds, filename, response);
}
}