c# DataTable针对xml、excel、csv导入和导出
2010-11-07 19:58
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此段代码是针对DataTable 对xml、excel、csv 对文件的导入和导出功能，记录一下，以供以后使用。
一定要导入excel 并添加引用Microsoft.Office.Interop.Excel 11.0版本。
Default.aspx.cs文件
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Default.aspx.cs文件
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
System.Data.SqlClient;
using
System.Data;
using
System.Xml;
using
System.Xml.Xsl;
using
System.IO;
using
System.Data.OleDb;
using
System.Data.Odbc;
using
System.Text;
using
Excel = Microsoft.Office.Interop.Excel;
namespace
fantest
{
public
partial
class
_Default : System.Web.UI.Page
{
protected
void
Page_Load(
object
sender, EventArgs e)
{
Bind();
}
protected
void
Bind()
{
this
.GridView1.DataSource =
this
.GetDataTable();
this
.GridView1.DataBind();
}
private
DataTable GetDataTable()
{
DataSet ds = new
DataSet();
using
(SqlConnection conn =
new
SqlConnection(
"server=.;uid=sa;pwd=123456;database=test"
))
{
string
sql =
"select * from InfoTable where 1=1"
;
SqlDataAdapter dap = new
SqlDataAdapter(sql, conn);
dap.Fill(ds,"InfoTable"
);
}
return
ds.Tables[
"InfoTable"
];
}
//TO XML
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protected
void
Button1_Click(
object
sender, EventArgs e)
{
DataTable dt = this
.GetDataTable();
StringBuilder sb = new
StringBuilder();
sb.Append("<"
+ dt.TableName +
">"
);
foreach
(DataRow row
in
dt.Rows)
{
sb.Append("<item>"
);
for
(
int
i = 0; i < dt.Columns.Count; i++)
{
sb.Append("<"
+ dt.Columns[i].ColumnName +
">"
+ row[i].ToString() +
"</"
+ dt.Columns[i].ColumnName +
">"
);
}
sb.Append("</item>"
);
}
sb.Append("</"
+ dt.TableName +
">"
);
Response.ClearHeaders();
Response.AppendHeader("Content-Disposition"
,
"attachment; filename=ss.xml"
);
Response.ContentType = "text/csv"
;
Response.Write(sb.ToString());
Response.End();
}
//FORM XML
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print
?
protected
void
Button2_Click(
object
sender, EventArgs e)
{
string
filepath = Server.MapPath(
"ss.xml"
);
if
(!File.Exists(filepath))
{
Page.RegisterClientScriptBlock("msg"
,
"<mce:script type="
text/javascript"><!--
alert('该文件不存在！'
)
// --></mce:script>");
}
else
{
StringReader StrStream = null
;
XmlTextReader Xmlrdr = null
;
try
{
XmlDocument xmldoc = new
XmlDocument();
xmldoc.Load(filepath);
DataSet ds = new
DataSet();
ds.ReadXml(new
XmlTextReader(
new
StringReader(xmldoc.InnerXml)));
this
.GridView2.DataSource = ds.Tables[0];
this
.GridView2.DataBind();
}
catch
(Exception ex)
{
throw
ex;
}
finally
{
if
(Xmlrdr !=
null
)
{
Xmlrdr.Close();
StrStream.Close();
StrStream.Dispose();
}
}
}
}
//TO EXCEL
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protected
void
Button3_Click(
object
sender, EventArgs e)
{
//Response.Charset = "GB2312";
//Response.ContentEncoding = System.Text.Encoding.UTF7;
//Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode("ss.xls", Encoding.UTF8).ToString());
//Response.ContentType = "application/vnd.ms-excel";
//this.EnableViewState = false;
//StringWriter tw = new StringWriter();
//HtmlTextWriter hw = new HtmlTextWriter(tw);
//this.GridView1.RenderControl(hw);
//Response.Write(tw.ToString());
//Response.End();
//上面注释的代码是一种以流的方式导入excel的，当数据在从此excel读取时会报一个异常，如果要对excel写入和读取最好用下面一种方式
DataTable dt = this
.GetDataTable();
string
filepath = HttpContext.Current.Server.MapPath(
"ss.xls"
);
Excel.Application xlApp = new
Excel.Application();
Excel.Workbooks w= xlApp.Workbooks;
Excel.Workbook workbook = w.Add(Excel.XlWBATemplate.xlWBATWorksheet);
Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];
//写入字段
for
(
int
i = 0; i < dt.Columns.Count; i++)
{
worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;
}
//写入数值
for
(
int
r = 0; r < dt.Rows.Count; r++)
{
for
(
int
i = 0; i < dt.Columns.Count; i++)
{
worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i];
}
}
worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。
workbook.Saved = true
;
workbook.SaveCopyAs(filepath);
xlApp.Quit();
GC.Collect();//强行销毁
HttpContext.Current.Response.Buffer = true
;
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ContentType = "application/ms-excel"
;
HttpContext.Current.Response.AddHeader("Content-Disposition"
,
"attachment;filename="
+ HttpUtility.UrlEncode(filepath));
HttpContext.Current.Response.WriteFile(filepath);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.End();
}
//FROM EXCEL
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protected
void
Button4_Click(
object
sender, EventArgs e)
{
//Office 2007 连接字符串
//string strConn = "Provider=Microsoft.Ace.OleDb.12.0;" + "Data Source=" + @path + ";" + "Extended Properties=Excel 12.0;"
//Office 98-2003 连接字符串(此示例使用2003)
string
filepath = Server.MapPath(
"ss.xls"
);
if
(!File.Exists(filepath))
{
Page.RegisterClientScriptBlock("msg"
,
""
);
}
else
{
string
strConn =
"Provider=Microsoft.Jet.OleDb.4.0;"
+
"data source="
+ filepath +
";Extended Properties='Excel 8.0; HDR=YES; IMEX=1'"
;
OleDbConnection conn = new
OleDbConnection(strConn);
OleDbDataAdapter odda = new
OleDbDataAdapter(
"select * from [Sheet1$]"
, conn);
DataSet ds = new
DataSet();
odda.Fill(ds);
this
.GridView2.DataSource = ds.Tables[0];
this
.GridView2.DataBind();
}
}
//TO CSV
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?
protected
void
Button5_Click(
object
sender, EventArgs e)
{
DataTable dt = this
.GetDataTable();
HttpContext.Current.Response.Clear();
System.IO.StringWriter sw = new
System.IO.StringWriter();
int
iColCount = dt.Columns.Count;
for
(
int
i = 0; i < iColCount; i++)
{
sw.Write("/""
+ dt.Columns[i] +
"/""
);
if
(i < iColCount - 1)
{
sw.Write(","
);
}
}
sw.Write(sw.NewLine);
foreach
(DataRow dr
in
dt.Rows)
{
for
(
int
i = 0; i < iColCount; i++)
{
if
(!Convert.IsDBNull(dr[i]))
sw.Write("/""
+ dr[i].ToString() +
"/""
);
else
sw.Write("/"/""
);
if
(i < iColCount - 1)
{
sw.Write(","
);
}
}
sw.Write(sw.NewLine);
}
sw.Close();
HttpContext.Current.Response.AddHeader("Content-Disposition"
,
"attachment; filename=ss.csv"
);
HttpContext.Current.Response.ContentType = "application/vnd.ms-excel"
;
HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312"
);
HttpContext.Current.Response.Write(sw);
HttpContext.Current.Response.End();
}
//FROM CSV
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print
?
protected
void
Button6_Click(
object
sender, EventArgs e)
{
string
filepath = Server.MapPath(
"ss.csv"
);
if
(!File.Exists(filepath))
{
Page.RegisterClientScriptBlock("msg"
,
""
);
}
else
{
string
strConn = @
"Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq="
;
strConn += ";Extensions=asc,csv,tab,txt;"
;
OdbcConnection objConn = new
OdbcConnection(strConn);
DataSet ds = new
DataSet();
try
{
string
strSql =
"select * from "
+ filepath;
OdbcDataAdapter odbcCSVDataAdapter = new
OdbcDataAdapter(strSql, objConn);
odbcCSVDataAdapter.Fill(ds);
this
.GridView2.DataSource = ds.Tables[0];
this
.GridView2.DataBind();
}
catch
(Exception ex)
{
throw
ex;
}
}
}
}
}
Default.aspx文件:
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> http://www.w3.org/1999/xhtml" >
Text="from xml" />
Text="toexcel" />
Text="fromexcel" />
Text="fromcsv" />
一定要导入excel 并添加引用Microsoft.Office.Interop.Excel 11.0版本。
Default.aspx.cs文件
view plain
copy to clipboard
?
Default.aspx.cs文件
using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Web;
using
System.Web.UI;
using
System.Web.UI.WebControls;
using
System.Data.SqlClient;
using
System.Data;
using
System.Xml;
using
System.Xml.Xsl;
using
System.IO;
using
System.Data.OleDb;
using
System.Data.Odbc;
using
System.Text;
using
Excel = Microsoft.Office.Interop.Excel;
namespace
fantest
{
public
partial
class
_Default : System.Web.UI.Page
{
protected
void
Page_Load(
object
sender, EventArgs e)
{
Bind();
}
protected
void
Bind()
{
this
.GridView1.DataSource =
this
.GetDataTable();
this
.GridView1.DataBind();
}
private
DataTable GetDataTable()
{
DataSet ds = new
DataSet();
using
(SqlConnection conn =
new
SqlConnection(
"server=.;uid=sa;pwd=123456;database=test"
))
{
string
sql =
"select * from InfoTable where 1=1"
;
SqlDataAdapter dap = new
SqlDataAdapter(sql, conn);
dap.Fill(ds,"InfoTable"
);
}
return
ds.Tables[
"InfoTable"
];
}
//TO XML
view plain
copy to clipboard
?
protected
void
Button1_Click(
object
sender, EventArgs e)
{
DataTable dt = this
.GetDataTable();
StringBuilder sb = new
StringBuilder();
sb.Append("<"
+ dt.TableName +
">"
);
foreach
(DataRow row
in
dt.Rows)
{
sb.Append("<item>"
);
for
(
int
i = 0; i < dt.Columns.Count; i++)
{
sb.Append("<"
+ dt.Columns[i].ColumnName +
">"
+ row[i].ToString() +
"</"
+ dt.Columns[i].ColumnName +
">"
);
}
sb.Append("</item>"
);
}
sb.Append("</"
+ dt.TableName +
">"
);
Response.ClearHeaders();
Response.AppendHeader("Content-Disposition"
,
"attachment; filename=ss.xml"
);
Response.ContentType = "text/csv"
;
Response.Write(sb.ToString());
Response.End();
}
//FORM XML
view plain
copy to clipboard
?
protected
void
Button2_Click(
object
sender, EventArgs e)
{
string
filepath = Server.MapPath(
"ss.xml"
);
if
(!File.Exists(filepath))
{
Page.RegisterClientScriptBlock("msg"
,
"<mce:script type="
text/javascript"><!--
alert('该文件不存在！'
)
// --></mce:script>");
}
else
{
StringReader StrStream = null
;
XmlTextReader Xmlrdr = null
;
try
{
XmlDocument xmldoc = new
XmlDocument();
xmldoc.Load(filepath);
DataSet ds = new
DataSet();
ds.ReadXml(new
XmlTextReader(
new
StringReader(xmldoc.InnerXml)));
this
.GridView2.DataSource = ds.Tables[0];
this
.GridView2.DataBind();
}
catch
(Exception ex)
{
throw
ex;
}
finally
{
if
(Xmlrdr !=
null
)
{
Xmlrdr.Close();
StrStream.Close();
StrStream.Dispose();
}
}
}
}
//TO EXCEL
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copy to clipboard
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protected
void
Button3_Click(
object
sender, EventArgs e)
{
//Response.Charset = "GB2312";
//Response.ContentEncoding = System.Text.Encoding.UTF7;
//Response.AppendHeader("Content-Disposition", "attachment;filename=" + HttpUtility.UrlEncode("ss.xls", Encoding.UTF8).ToString());
//Response.ContentType = "application/vnd.ms-excel";
//this.EnableViewState = false;
//StringWriter tw = new StringWriter();
//HtmlTextWriter hw = new HtmlTextWriter(tw);
//this.GridView1.RenderControl(hw);
//Response.Write(tw.ToString());
//Response.End();
//上面注释的代码是一种以流的方式导入excel的，当数据在从此excel读取时会报一个异常，如果要对excel写入和读取最好用下面一种方式
DataTable dt = this
.GetDataTable();
string
filepath = HttpContext.Current.Server.MapPath(
"ss.xls"
);
Excel.Application xlApp = new
Excel.Application();
Excel.Workbooks w= xlApp.Workbooks;
Excel.Workbook workbook = w.Add(Excel.XlWBATemplate.xlWBATWorksheet);
Excel.Worksheet worksheet = (Excel.Worksheet)workbook.Worksheets[1];
//写入字段
for
(
int
i = 0; i < dt.Columns.Count; i++)
{
worksheet.Cells[1, i + 1] = dt.Columns[i].ColumnName;
}
//写入数值
for
(
int
r = 0; r < dt.Rows.Count; r++)
{
for
(
int
i = 0; i < dt.Columns.Count; i++)
{
worksheet.Cells[r + 2, i + 1] = dt.Rows[r][i];
}
}
worksheet.Columns.EntireColumn.AutoFit();//列宽自适应。
workbook.Saved = true
;
workbook.SaveCopyAs(filepath);
xlApp.Quit();
GC.Collect();//强行销毁
HttpContext.Current.Response.Buffer = true
;
HttpContext.Current.Response.Clear();
HttpContext.Current.Response.ContentType = "application/ms-excel"
;
HttpContext.Current.Response.AddHeader("Content-Disposition"
,
"attachment;filename="
+ HttpUtility.UrlEncode(filepath));
HttpContext.Current.Response.WriteFile(filepath);
HttpContext.Current.Response.Flush();
HttpContext.Current.Response.End();
}
//FROM EXCEL
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copy to clipboard
?
protected
void
Button4_Click(
object
sender, EventArgs e)
{
//Office 2007 连接字符串
//string strConn = "Provider=Microsoft.Ace.OleDb.12.0;" + "Data Source=" + @path + ";" + "Extended Properties=Excel 12.0;"
//Office 98-2003 连接字符串(此示例使用2003)
string
filepath = Server.MapPath(
"ss.xls"
);
if
(!File.Exists(filepath))
{
Page.RegisterClientScriptBlock("msg"
,
""
);
}
else
{
string
strConn =
"Provider=Microsoft.Jet.OleDb.4.0;"
+
"data source="
+ filepath +
";Extended Properties='Excel 8.0; HDR=YES; IMEX=1'"
;
OleDbConnection conn = new
OleDbConnection(strConn);
OleDbDataAdapter odda = new
OleDbDataAdapter(
"select * from [Sheet1$]"
, conn);
DataSet ds = new
DataSet();
odda.Fill(ds);
this
.GridView2.DataSource = ds.Tables[0];
this
.GridView2.DataBind();
}
}
//TO CSV
view plain
copy to clipboard
?
protected
void
Button5_Click(
object
sender, EventArgs e)
{
DataTable dt = this
.GetDataTable();
HttpContext.Current.Response.Clear();
System.IO.StringWriter sw = new
System.IO.StringWriter();
int
iColCount = dt.Columns.Count;
for
(
int
i = 0; i < iColCount; i++)
{
sw.Write("/""
+ dt.Columns[i] +
"/""
);
if
(i < iColCount - 1)
{
sw.Write(","
);
}
}
sw.Write(sw.NewLine);
foreach
(DataRow dr
in
dt.Rows)
{
for
(
int
i = 0; i < iColCount; i++)
{
if
(!Convert.IsDBNull(dr[i]))
sw.Write("/""
+ dr[i].ToString() +
"/""
);
else
sw.Write("/"/""
);
if
(i < iColCount - 1)
{
sw.Write(","
);
}
}
sw.Write(sw.NewLine);
}
sw.Close();
HttpContext.Current.Response.AddHeader("Content-Disposition"
,
"attachment; filename=ss.csv"
);
HttpContext.Current.Response.ContentType = "application/vnd.ms-excel"
;
HttpContext.Current.Response.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312"
);
HttpContext.Current.Response.Write(sw);
HttpContext.Current.Response.End();
}
//FROM CSV
view plain
copy to clipboard
?
protected
void
Button6_Click(
object
sender, EventArgs e)
{
string
filepath = Server.MapPath(
"ss.csv"
);
if
(!File.Exists(filepath))
{
Page.RegisterClientScriptBlock("msg"
,
""
);
}
else
{
string
strConn = @
"Driver={Microsoft Text Driver (*.txt; *.csv)};Dbq="
;
strConn += ";Extensions=asc,csv,tab,txt;"
;
OdbcConnection objConn = new
OdbcConnection(strConn);
DataSet ds = new
DataSet();
try
{
string
strSql =
"select * from "
+ filepath;
OdbcDataAdapter odbcCSVDataAdapter = new
OdbcDataAdapter(strSql, objConn);
odbcCSVDataAdapter.Fill(ds);
this
.GridView2.DataSource = ds.Tables[0];
this
.GridView2.DataBind();
}
catch
(Exception ex)
{
throw
ex;
}
}
}
}
}
Default.aspx文件:
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> http://www.w3.org/1999/xhtml" >
Text="from xml" />
Text="toexcel" />
Text="fromexcel" />
Text="fromcsv" />
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