C#自定義導(dǎo)出數(shù)據(jù)到Excel的類實(shí)例
更新時(shí)間：2015年03月25日 15:12:51 作者：lele
這篇文章主要介紹了C#自定義導(dǎo)出數(shù)據(jù)到Excel的類,實(shí)例分析了C#操作Excel的技巧,非常具有實(shí)用價(jià)值,需要的朋友可以參考下
本文實(shí)例講述了C#自定義導(dǎo)出數(shù)據(jù)到Excel的類。分享給大家供大家參考。具體如下：
C#自定義Excel操作類，可以用于將DataTable導(dǎo)出到Excel文件，從Excel文件讀取數(shù)據(jù)。
using System;
using System.IO;
using System.Data;
using System.Collections;
using System.Data.OleDb;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
namespace DotNet.Utilities
{
/// <summary>
/// Excel操作類
/// </summary>
/// Microsoft Excel 11.0 Object Library
public class ExcelHelper
{
#region 數(shù)據(jù)導(dǎo)出至Excel文件
/// </summary>
/// 導(dǎo)出Excel文件，自動(dòng)返回可下載的文件流
/// </summary>
public static void DataTable1Excel(System.Data.DataTable dtData)
{
GridView gvExport = null;
HttpContext curContext = HttpContext.Current;
StringWriter strWriter = null;
HtmlTextWriter htmlWriter = null;
if (dtData != null)
{
curContext.Response.ContentType = "application/vnd.ms-excel";
curContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
curContext.Response.Charset = "utf-8";
strWriter = new StringWriter();
htmlWriter = new HtmlTextWriter(strWriter);
gvExport = new GridView();
gvExport.DataSource = dtData.DefaultView;
gvExport.AllowPaging = false;
gvExport.DataBind();
gvExport.RenderControl(htmlWriter);
curContext.Response.Write("<meta http-equiv=\"Content-Type\" content=\"text/html;charset=gb2312\"/>" + strWriter.ToString());
curContext.Response.End();
}
}
/// <summary>
/// 導(dǎo)出Excel文件，轉(zhuǎn)換為可讀模式
/// </summary>
public static void DataTable2Excel(System.Data.DataTable dtData)
{
DataGrid dgExport = null;
HttpContext curContext = HttpContext.Current;
StringWriter strWriter = null;
HtmlTextWriter htmlWriter = null;
if (dtData != null)
{
curContext.Response.ContentType = "application/vnd.ms-excel";
curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;
curContext.Response.Charset = "";
strWriter = new StringWriter();
htmlWriter = new HtmlTextWriter(strWriter);
dgExport = new DataGrid();
dgExport.DataSource = dtData.DefaultView;
dgExport.AllowPaging = false;
dgExport.DataBind();
dgExport.RenderControl(htmlWriter);
curContext.Response.Write(strWriter.ToString());
curContext.Response.End();
}
}
/// <summary>
/// 導(dǎo)出Excel文件，并自定義文件名
/// </summary>
public static void DataTable3Excel(System.Data.DataTable dtData, String FileName)
{
GridView dgExport = null;
HttpContext curContext = HttpContext.Current;
StringWriter strWriter = null;
HtmlTextWriter htmlWriter = null;
if (dtData != null)
{
HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8);
curContext.Response.AddHeader("content-disposition", "attachment;filename=" + HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls");
curContext.Response.ContentType = "application nd.ms-excel";
curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;
curContext.Response.Charset = "GB2312";
strWriter = new StringWriter();
htmlWriter = new HtmlTextWriter(strWriter);
dgExport = new GridView();
dgExport.DataSource = dtData.DefaultView;
dgExport.AllowPaging = false;
dgExport.DataBind();
dgExport.RenderControl(htmlWriter);
curContext.Response.Write(strWriter.ToString());
curContext.Response.End();
}
}
/// <summary>
/// 將數(shù)據(jù)導(dǎo)出至Excel文件
/// </summary>
/// <param name="Table">DataTable對(duì)象</param>
/// <param name="ExcelFilePath">Excel文件路徑</param>
public static bool OutputToExcel(DataTable Table, string ExcelFilePath)
{
if (File.Exists(ExcelFilePath))
{
throw new Exception("該文件已經(jīng)存在！");
}
if ((Table.TableName.Trim().Length == 0) || (Table.TableName.ToLower() == "table"))
{
Table.TableName = "Sheet1";
}
//數(shù)據(jù)表的列數(shù)
int ColCount = Table.Columns.Count;
//用于記數(shù)，實(shí)例化參數(shù)時(shí)的序號(hào)
int i = 0;
//創(chuàng)建參數(shù)
OleDbParameter[] para = new OleDbParameter[ColCount];
//創(chuàng)建表結(jié)構(gòu)的SQL語(yǔ)句
string TableStructStr = @"Create Table " + Table.TableName + "(";
//連接字符串
string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0;";
OleDbConnection objConn = new OleDbConnection(connString);
//創(chuàng)建表結(jié)構(gòu)
OleDbCommand objCmd = new OleDbCommand();
//數(shù)據(jù)類型集合
ArrayList DataTypeList = new ArrayList();
DataTypeList.Add("System.Decimal");
DataTypeList.Add("System.Double");
DataTypeList.Add("System.Int16");
DataTypeList.Add("System.Int32");
DataTypeList.Add("System.Int64");
DataTypeList.Add("System.Single");
//遍歷數(shù)據(jù)表的所有列，用于創(chuàng)建表結(jié)構(gòu)
foreach (DataColumn col in Table.Columns)
{
//如果列屬于數(shù)字列，則設(shè)置該列的數(shù)據(jù)類型為double
if (DataTypeList.IndexOf(col.DataType.ToString()) >= 0)
{
para[i] = new OleDbParameter("@" + col.ColumnName, OleDbType.Double);
objCmd.Parameters.Add(para[i]);
//如果是最后一列
if (i + 1 == ColCount)
{
TableStructStr += col.ColumnName + " double)";
}
else
{
TableStructStr += col.ColumnName + " double,";
}
}
else
{
para[i] = new OleDbParameter("@" + col.ColumnName, OleDbType.VarChar);
objCmd.Parameters.Add(para[i]);
//如果是最后一列
if (i + 1 == ColCount)
{
TableStructStr += col.ColumnName + " varchar)";
}
else
{
TableStructStr += col.ColumnName + " varchar,";
}
}
i++;
}
//創(chuàng)建Excel文件及文件結(jié)構(gòu)
try
{
objCmd.Connection = objConn;
objCmd.CommandText = TableStructStr;
if (objConn.State == ConnectionState.Closed)
{
objConn.Open();
}
objCmd.ExecuteNonQuery();
}
catch (Exception exp)
{
throw exp;
}
//插入記錄的SQL語(yǔ)句
string InsertSql_1 = "Insert into " + Table.TableName + " (";
string InsertSql_2 = " Values (";
string InsertSql = "";
//遍歷所有列，用于插入記錄，在此創(chuàng)建插入記錄的SQL語(yǔ)句
for (int colID = 0; colID < ColCount; colID++)
{
if (colID + 1 == ColCount) //最后一列
{
InsertSql_1 += Table.Columns[colID].ColumnName + ")";
InsertSql_2 += "@" + Table.Columns[colID].ColumnName + ")";
}
else
{
InsertSql_1 += Table.Columns[colID].ColumnName + ",";
InsertSql_2 += "@" + Table.Columns[colID].ColumnName + ",";
}
}
InsertSql = InsertSql_1 + InsertSql_2;
//遍歷數(shù)據(jù)表的所有數(shù)據(jù)行
for (int rowID = 0; rowID < Table.Rows.Count; rowID++)
{
for (int colID = 0; colID < ColCount; colID++)
{
if (para[colID].DbType == DbType.Double && Table.Rows[rowID][colID].ToString().Trim() == "")
{
para[colID].Value = 0;
}
else
{
para[colID].Value = Table.Rows[rowID][colID].ToString().Trim();
}
}
try
{
objCmd.CommandText = InsertSql;
objCmd.ExecuteNonQuery();
}
catch (Exception exp)
{
string str = exp.Message;
}
}
try
{
if (objConn.State == ConnectionState.Open)
{
objConn.Close();
}
}
catch (Exception exp)
{
throw exp;
}
return true;
}
/// <summary>
/// 將數(shù)據(jù)導(dǎo)出至Excel文件
/// </summary>
/// <param name="Table">DataTable對(duì)象</param>
/// <param name="Columns">要導(dǎo)出的數(shù)據(jù)列集合</param>
/// <param name="ExcelFilePath">Excel文件路徑</param>
public static bool OutputToExcel(DataTable Table, ArrayList Columns, string ExcelFilePath)
{
if (File.Exists(ExcelFilePath))
{
throw new Exception("該文件已經(jīng)存在！");
}
//如果數(shù)據(jù)列數(shù)大于表的列數(shù)，取數(shù)據(jù)表的所有列
if (Columns.Count > Table.Columns.Count)
{
for (int s = Table.Columns.Count + 1; s <= Columns.Count; s++)
{
Columns.RemoveAt(s); //移除數(shù)據(jù)表列數(shù)后的所有列
}
}
//遍歷所有的數(shù)據(jù)列，如果有數(shù)據(jù)列的數(shù)據(jù)類型不是 DataColumn，則將它移除
DataColumn column = new DataColumn();
for (int j = 0; j < Columns.Count; j++)
{
try
{
column = (DataColumn)Columns[j];
}
catch (Exception)
{
Columns.RemoveAt(j);
}
}
if ((Table.TableName.Trim().Length == 0) || (Table.TableName.ToLower() == "table"))
{
Table.TableName = "Sheet1";
}
//數(shù)據(jù)表的列數(shù)
int ColCount = Columns.Count;
//創(chuàng)建參數(shù)
OleDbParameter[] para = new OleDbParameter[ColCount];
//創(chuàng)建表結(jié)構(gòu)的SQL語(yǔ)句
string TableStructStr = @"Create Table " + Table.TableName + "(";
//連接字符串
string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0;";
OleDbConnection objConn = new OleDbConnection(connString);
//創(chuàng)建表結(jié)構(gòu)
OleDbCommand objCmd = new OleDbCommand();
//數(shù)據(jù)類型集合
ArrayList DataTypeList = new ArrayList();
DataTypeList.Add("System.Decimal");
DataTypeList.Add("System.Double");
DataTypeList.Add("System.Int16");
DataTypeList.Add("System.Int32");
DataTypeList.Add("System.Int64");
DataTypeList.Add("System.Single");
DataColumn col = new DataColumn();
//遍歷數(shù)據(jù)表的所有列，用于創(chuàng)建表結(jié)構(gòu)
for (int k = 0; k < ColCount; k++)
{
col = (DataColumn)Columns[k];
//列的數(shù)據(jù)類型是數(shù)字型
if (DataTypeList.IndexOf(col.DataType.ToString().Trim()) >= 0)
{
para[k] = new OleDbParameter("@" + col.Caption.Trim(), OleDbType.Double);
objCmd.Parameters.Add(para[k]);
//如果是最后一列
if (k + 1 == ColCount)
{
TableStructStr += col.Caption.Trim() + " Double)";
}
else
{
TableStructStr += col.Caption.Trim() + " Double,";
}
}
else
{
para[k] = new OleDbParameter("@" + col.Caption.Trim(), OleDbType.VarChar);
objCmd.Parameters.Add(para[k]);
//如果是最后一列
if (k + 1 == ColCount)
{
TableStructStr += col.Caption.Trim() + " VarChar)";
}
else
{
TableStructStr += col.Caption.Trim() + " VarChar,";
}
}
}
//創(chuàng)建Excel文件及文件結(jié)構(gòu)
try
{
objCmd.Connection = objConn;
objCmd.CommandText = TableStructStr;
if (objConn.State == ConnectionState.Closed)
{
objConn.Open();
}
objCmd.ExecuteNonQuery();
}
catch (Exception exp)
{
throw exp;
}
//插入記錄的SQL語(yǔ)句
string InsertSql_1 = "Insert into " + Table.TableName + " (";
string InsertSql_2 = " Values (";
string InsertSql = "";
//遍歷所有列，用于插入記錄，在此創(chuàng)建插入記錄的SQL語(yǔ)句
for (int colID = 0; colID < ColCount; colID++)
{
if (colID + 1 == ColCount) //最后一列
{
InsertSql_1 += Columns[colID].ToString().Trim() + ")";
InsertSql_2 += "@" + Columns[colID].ToString().Trim() + ")";
}
else
{
InsertSql_1 += Columns[colID].ToString().Trim() + ",";
InsertSql_2 += "@" + Columns[colID].ToString().Trim() + ",";
}
}
InsertSql = InsertSql_1 + InsertSql_2;
//遍歷數(shù)據(jù)表的所有數(shù)據(jù)行
DataColumn DataCol = new DataColumn();
for (int rowID = 0; rowID < Table.Rows.Count; rowID++)
{
for (int colID = 0; colID < ColCount; colID++)
{
//因?yàn)榱胁贿B續(xù)，所以在取得單元格時(shí)不能用行列編號(hào)，列需得用列的名稱
DataCol = (DataColumn)Columns[colID];
if (para[colID].DbType == DbType.Double && Table.Rows[rowID][DataCol.Caption].ToString().Trim() == "")
{
para[colID].Value = 0;
}
else
{
para[colID].Value = Table.Rows[rowID][DataCol.Caption].ToString().Trim();
}
}
try
{
objCmd.CommandText = InsertSql;
objCmd.ExecuteNonQuery();
}
catch (Exception exp)
{
string str = exp.Message;
}
}
try
{
if (objConn.State == ConnectionState.Open)
{
objConn.Close();
}
}
catch (Exception exp)
{
throw exp;
}
return true;
}
#endregion
/// <summary>
/// 獲取Excel文件數(shù)據(jù)表列表
/// </summary>
public static ArrayList GetExcelTables(string ExcelFileName)
{
DataTable dt = new DataTable();
ArrayList TablesList = new ArrayList();
if (File.Exists(ExcelFileName))
{
using (OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Data Source=" + ExcelFileName))
{
try
{
conn.Open();
dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
}
catch (Exception exp)
{
throw exp;
}
//獲取數(shù)據(jù)表個(gè)數(shù)
int tablecount = dt.Rows.Count;
for (int i = 0; i < tablecount; i++)
{
string tablename = dt.Rows[i][2].ToString().Trim().TrimEnd('$');
if (TablesList.IndexOf(tablename) < 0)
{
TablesList.Add(tablename);
}
}
}
}
return TablesList;
}
/// <summary>
/// 將Excel文件導(dǎo)出至DataTable(第一行作為表頭)
/// </summary>
/// <param name="ExcelFilePath">Excel文件路徑</param>
/// <param name="TableName">數(shù)據(jù)表名，如果數(shù)據(jù)表名錯(cuò)誤，默認(rèn)為第一個(gè)數(shù)據(jù)表名</param>
public static DataTable InputFromExcel(string ExcelFilePath, string TableName)
{
if (!File.Exists(ExcelFilePath))
{
throw new Exception("Excel文件不存在！");
}
//如果數(shù)據(jù)表名不存在，則數(shù)據(jù)表名為Excel文件的第一個(gè)數(shù)據(jù)表
ArrayList TableList = new ArrayList();
TableList = GetExcelTables(ExcelFilePath);
if (TableName.IndexOf(TableName) < 0)
{
TableName = TableList[0].ToString().Trim();
}
DataTable table = new DataTable();
OleDbConnection dbcon = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0");
OleDbCommand cmd = new OleDbCommand("select * from [" + TableName + "$]", dbcon);
OleDbDataAdapter adapter = new OleDbDataAdapter(cmd);
try
{
if (dbcon.State == ConnectionState.Closed)
{
dbcon.Open();
}
adapter.Fill(table);
}
catch (Exception exp)
{
throw exp;
}
finally
{
if (dbcon.State == ConnectionState.Open)
{
dbcon.Close();
}
}
return table;
}
/// <summary>
/// 獲取Excel文件指定數(shù)據(jù)表的數(shù)據(jù)列表
/// </summary>
/// <param name="ExcelFileName">Excel文件名</param>
/// <param name="TableName">數(shù)據(jù)表名</param>
public static ArrayList GetExcelTableColumns(string ExcelFileName, string TableName)
{
DataTable dt = new DataTable();
ArrayList ColsList = new ArrayList();
if (File.Exists(ExcelFileName))
{
using (OleDbConnection conn = new OleDbConnection("Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties=Excel 8.0;Data Source=" + ExcelFileName))
{
conn.Open();
dt = conn.GetOleDbSchemaTable(OleDbSchemaGuid.Columns, new object[] { null, null, TableName, null });
//獲取列個(gè)數(shù)
int colcount = dt.Rows.Count;
for (int i = 0; i < colcount; i++)
{
string colname = dt.Rows[i]["Column_Name"].ToString().Trim();
ColsList.Add(colname);
}
}
}
return ColsList;
}
}
}
希望本文所述對(duì)大家的C#程序設(shè)計(jì)有所幫助。
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