將datagrid中數據導出到excel中 -------<<工做日誌2014-6-6>>

 

 

前臺datagrid數據綁定

 

 

#region 導出到excel中
    /// <summary>
    /// 2014-6-6
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    

protected void lnkbtnExcel_Click(object sender, EventArgs e)//導出Excel按鈕點擊事件
    {
        DataSet ds = new DataSet();
        DataTable dt = new DataTable("tblExXuQiu");
        ds.Tables.Add(dt);
        //dgResEleList  dataGrid控件

　　  //導出的excel的標題

        dt.Columns.Add(new DataColumn("序列號", System.Type.GetType("System.String")));//序列號
        dt.Columns.Add(new DataColumn("區縣局", System.Type.GetType("System.String")));//區縣局
        dt.Columns.Add(new DataColumn("2013任務", System.Type.GetType(" System.String")));//2013任務
        dt.Columns.Add(new DataColumn("已改造", System.Type.GetType(" System.String")));//已改造
        dt.Columns.Add(new DataColumn("已更新", System.Type.GetType(" System.String")));//已更新
        dt.Columns.Add(new DataColumn("已完成小計", System.Type.GetType(" System.String")));//已完成小計
        dt.Columns.Add(new DataColumn("未完成小計", System.Type.GetType(" System.String")));//未完成小計
        if (dgResEleList.Items.Count == 0)
        {
            JSUAlter.Alert(this.Page, "沒有數據  沒法導出");
            return;
        }
        else
        {
            for (int i = 0; i < dgResEleList2013.Items.Count; i++)
            {
                DataRow dr = dt.NewRow();
                if (dgResEleList2013.Items[i].ItemType == ListItemType.Item || dgResEleList2013.Items[i].ItemType == ListItemType.AlternatingItem || dgResEleList2013.Items[i].ItemType == ListItemType.SelectedItem)
                {

　　　　　　　//前臺使用綁定數據

　　　　　　　　

　　　　　　　　//後臺取值

                    dr["序列號"] = (dgResEleList2013.Items[i].Cells[0].FindControl("SeqLB1") as Label).Text.Trim();

　　　　　　　//前臺使用<asp:BoundColumn DataField="int2013" HeaderText="2013任務"></asp:BoundColumn>綁定數據
                    dr["區縣局"] = dgResEleList2013.Items[i].Cells[1].Text.Trim();

                    dr["2013任務"] = dgResEleList2013.Items[i].Cells[2].Text.Trim();
                    dr["已改造"] = (dgResEleList2013.Items[i].Cells[3].FindControl("intGZ1") as Label).Text.Trim();
                    dr["已更新"] = (dgResEleList2013.Items[i].Cells[4].FindControl("intGX1") as Label).Text.Trim();
                    dr["已完成小計"] = (dgResEleList2013.Items[i].Cells[5].FindControl("intFTotal1") as Label).Text.Trim();
                    dr["未完成小計"] = (dgResEleList2013.Items[i].Cells[6].FindControl("intUTotal1") as Label).Text.Trim();
                    dt.Rows.Add(dr);
                }
            }

　　　　//調用ExcelHelper類  傳入參數 數據源   excel名稱
            ExcelHelper.DataTable3Excel(ds.Tables[0], "Excel" + DateTime.Now.ToString("yyyy-MM-dd"));
        }
    }

    #endregion

 

 

ExcelHelper類

/// <summary>
/// 類說明：Assistant
/// 編 碼 人：
/// 聯繫方式：
/// 更新網站：
/// </summary>
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;
using Wsl.WorkFrame;

/// <summary>
/// Excel操做類
/// </summary>
/// Microsoft Excel 11.0 Object Library
public class ExcelHelper : SqlDaoObject
{
    #region 數據導出至Excel文件
    /// </summary>
    /// 導出Excel文件，自動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.Charset = "utf-8";
            curContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("gb2312");
           
            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();
        }
    }

    #region 導出Excel文件，轉換爲可讀模式
    /// <summary>
    /// 導出Excel文件，轉換爲可讀模式
    /// </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();
        }
    }
    #endregion

    #region 導出Excel文件，並自定義文件名
    /// <summary>
    /// 導出Excel文件，並自定義文件名
    /// </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)
        {
            curContext.Response.Clear();
            HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8);
            //Response.AppendHeader("content-disposition", "attachment;filename=\"" + System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls\"");

            curContext.Response.AddHeader("content-disposition", "attachment;filename=\"" + System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls\"");
            curContext.Response.ContentType = "application/ms-excel";
            curContext.Response.Charset = "GB2312";
           // curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;
            curContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("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("<meta http-equiv=\"content-type\" content=\"application/ms-excel; charset=gb2312\"/>" +strWriter.ToString());
            curContext.Response.End();
            //curContext.ApplicationInstance.CompleteRequest();
        }
    }
    #endregion

    #region 導出Excel文件，並自定義文件名 record
    /// <summary>
    /// 導出Excel文件，並自定義文件名 record
    /// </summary>
    public static void DataTableRecExcel(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);
            //Response.AppendHeader("content-disposition", "attachment;filename=\"" + System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls\"");

            curContext.Response.AddHeader("content-disposition", "attachment;filename=\"" + System.Web.HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8) + ".xls\"");
            curContext.Response.ContentType = "application/ms-excel";
            curContext.Response.Charset = "GB2312";
            curContext.Response.ContentEncoding = System.Text.Encoding.UTF8;
            //curContext.Response.ContentEncoding = System.Text.Encoding.GetEncoding("UTF8");

            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();
        }
    }
    #endregion

    #region 將數據導出至Excel文件
    /// <summary>
    /// 將數據導出至Excel文件
    /// </summary>
    /// <param name="Table">DataTable對象</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("該文件已經存在！");
        }

        if ((Table.TableName.Trim().Length == 0) || (Table.TableName.ToLower() == "table"))
        {
            Table.TableName = "Sheet1";
        }

        //數據表的列數
        int ColCount = Table.Columns.Count;

        //用於記數，實例化參數時的序號
        int i = 0;

        //建立參數
        OleDbParameter[] para = new OleDbParameter[ColCount];

        //建立表結構的SQL語句
        string TableStructStr = @"Create Table " + Table.TableName + "(";

        //鏈接字符串
        string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0;";
        OleDbConnection objConn = new OleDbConnection(connString);

        //建立表結構
        OleDbCommand objCmd = new OleDbCommand();

        //數據類型集合
        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");

        //遍歷數據表的全部列，用於建立表結構
        foreach (DataColumn col in Table.Columns)
        {
            //若是列屬於數字列，則設置該列的數據類型爲double
            if (DataTypeList.IndexOf(col.DataType.ToString()) >= 0)
            {
                para[i] = new OleDbParameter("@" + col.ColumnName, OleDbType.Double);
                objCmd.Parameters.Add(para[i]);

                //若是是最後一列
                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]);

                //若是是最後一列
                if (i + 1 == ColCount)
                {
                    TableStructStr += col.ColumnName + " varchar)";
                }
                else
                {
                    TableStructStr += col.ColumnName + " varchar,";
                }
            }
            i++;
        }

        //建立Excel文件及文件結構
        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語句
        string InsertSql_1 = "Insert into " + Table.TableName + " (";
        string InsertSql_2 = " Values (";
        string InsertSql = "";

        //遍歷全部列，用於插入記錄，在此建立插入記錄的SQL語句
        for (int colID = 0; colID < ColCount; colID++)
        {
            if (colID + 1 == ColCount)  //最後一列
            {
                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;

        //遍歷數據表的全部數據行
        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;
    }

    #endregion

    #region 將數據導出至Excel文件
     /// <summary>
    /// 將數據導出至Excel文件
    /// </summary>
    /// <param name="Table">DataTable對象</param>
    /// <param name="Columns">要導出的數據列集合</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("該文件已經存在！");
        }

        //若是數據列數大於表的列數，取數據表的全部列
        if (Columns.Count > Table.Columns.Count)
        {
            for (int s = Table.Columns.Count + 1; s <= Columns.Count; s++)
            {
                Columns.RemoveAt(s);   //移除數據表列數後的全部列
            }
        }

        //遍歷全部的數據列，若是有數據列的數據類型不是 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";
        }

        //數據表的列數
        int ColCount = Columns.Count;

        //建立參數
        OleDbParameter[] para = new OleDbParameter[ColCount];

        //建立表結構的SQL語句
        string TableStructStr = @"Create Table " + Table.TableName + "(";

        //鏈接字符串
        string connString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + ExcelFilePath + ";Extended Properties=Excel 8.0;";
        OleDbConnection objConn = new OleDbConnection(connString);

        //建立表結構
        OleDbCommand objCmd = new OleDbCommand();

        //數據類型集合
        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();

        //遍歷數據表的全部列，用於建立表結構
        for (int k = 0; k < ColCount; k++)
        {
            col = (DataColumn)Columns[k];

            //列的數據類型是數字型
            if (DataTypeList.IndexOf(col.DataType.ToString().Trim()) >= 0)
            {
                para[k] = new OleDbParameter("@" + col.Caption.Trim(), OleDbType.Double);
                objCmd.Parameters.Add(para[k]);

                //若是是最後一列
                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]);

                //若是是最後一列
                if (k + 1 == ColCount)
                {
                    TableStructStr += col.Caption.Trim() + " VarChar)";
                }
                else
                {
                    TableStructStr += col.Caption.Trim() + " VarChar,";
                }
            }
        }

        //建立Excel文件及文件結構
        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語句
        string InsertSql_1 = "Insert into " + Table.TableName + " (";
        string InsertSql_2 = " Values (";
        string InsertSql = "";

        //遍歷全部列，用於插入記錄，在此建立插入記錄的SQL語句
        for (int colID = 0; colID < ColCount; colID++)
        {
            if (colID + 1 == ColCount)  //最後一列
            {
                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;

        //遍歷數據表的全部數據行
        DataColumn DataCol = new DataColumn();
        for (int rowID = 0; rowID < Table.Rows.Count; rowID++)
        {
            for (int colID = 0; colID < ColCount; colID++)
            {
                //由於列不連續，因此在取得單元格時不能用行列編號，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
    #endregion

  

    /// <summary>
    /// 獲取Excel文件數據表列表
    /// </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;
                }

                //獲取數據表個數
                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文件導出至DataTable(第一行做爲表頭)
    /// </summary>
    /// <param name="ExcelFilePath">Excel文件路徑</param>
    /// <param name="TableName">數據表名，若是數據表名錯誤，默認爲第一個數據表名</param>
    public static DataTable InputFromExcel(string ExcelFilePath, string TableName)
    {
        if (!File.Exists(ExcelFilePath))
        {
            throw new Exception("Excel文件不存在！");
        }

        //若是數據表名不存在，則數據表名爲Excel文件的第一個數據表
        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文件指定數據表的數據列表
    /// </summary>
    /// <param name="ExcelFileName">Excel文件名</param>
    /// <param name="TableName">數據表名</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 });

                //獲取列個數                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;    }}