GridView既强大又好用。为了让它更强大、更好用,我们来写一个继承自GridView的控件。
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[源码下载]
作者: webabcd
OK
[源码下载]
[索引页]
[源码下载]
扩展GridView控件(8) - 导出数据源的数据为Excel、Word或Text
作者: webabcd
/*正式版的实现 开始*/
介绍
扩展GridView控件:
导出数据源的数据为Excel、Word或Text(应保证数据源的类型为DataTable或DataSet)
使用方法:
为SmartGridView添加的方法
Export(string fileName)
Export(string fileName, ExportFormat exportFormat)
Export(string fileName, ExportFormat exportFormat, Encoding encoding)
Export(string fileName, int[] columnIndexList, ExportFormat exportFormat, Encoding encoding)
Export(string fileName, int[] columnIndexList, string[] headers, ExportFormat exportFormat, Encoding encoding)
Export(string fileName, string[] columnNameList, ExportFormat exportFormat, Encoding encoding)
Export(string fileName, string[] columnNameList, string[] headers, ExportFormat exportFormat, Encoding encoding)
关键代码
扩展GridView控件:
导出数据源的数据为Excel、Word或Text(应保证数据源的类型为DataTable或DataSet)
使用方法:
为SmartGridView添加的方法
Export(string fileName)
Export(string fileName, ExportFormat exportFormat)
Export(string fileName, ExportFormat exportFormat, Encoding encoding)
Export(string fileName, int[] columnIndexList, ExportFormat exportFormat, Encoding encoding)
Export(string fileName, int[] columnIndexList, string[] headers, ExportFormat exportFormat, Encoding encoding)
Export(string fileName, string[] columnNameList, ExportFormat exportFormat, Encoding encoding)
Export(string fileName, string[] columnNameList, string[] headers, ExportFormat exportFormat, Encoding encoding)
关键代码
using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Web.UI.WebControls;
namespace YYControls
{
/// <summary>
/// SmartGridView类的属性部分
/// </summary>
public partial class SmartGridView
{
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">文件名</param>
/// <param name="exportFormat">导出文件的格式</param>
/// <param name="encoding">编码</param>
public void Export( string fileName, ExportFormat exportFormat, Encoding encoding)
{
DataTable dt = GetDataTable();
Helper.Common.Export(dt, exportFormat, fileName, encoding);
}
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">文件名</param>
/// <param name="exportFormat">导出文件的格式</param>
public void Export( string fileName, ExportFormat exportFormat)
{
Export(fileName, exportFormat, Encoding.GetEncoding( "GB2312"));
}
/// <summary>
/// 导出SmartGridView的数据源的数据为Excel
/// </summary>
/// <param name="fileName">文件名</param>
public void Export( string fileName)
{
Export(fileName, ExportFormat.CSV);
}
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">输出文件名</param>
/// <param name="columnIndexList">导出的列索引数组</param>
/// <param name="exportFormat">导出文件的格式</param>
/// <param name="encoding">编码</param>
public void Export( string fileName, int[] columnIndexList, ExportFormat exportFormat, Encoding encoding)
{
DataTable dt = GetDataTable();
Helper.Common.Export(dt, columnIndexList, exportFormat, fileName, encoding);
}
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">输出文件名</param>
/// <param name="columnNameList">导出的列的列名数组</param>
/// <param name="exportFormat">导出文件的格式</param>
/// <param name="encoding">编码</param>
public void Export( string fileName, string[] columnNameList, ExportFormat exportFormat, Encoding encoding)
{
DataTable dt = GetDataTable();
Helper.Common.Export(dt, columnNameList, exportFormat, fileName, encoding);
}
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">输出文件名</param>
/// <param name="columnIndexList">导出的列索引数组</param>
/// <param name="headers">导出的列标题数组</param>
/// <param name="exportFormat">导出文件的格式</param>
/// <param name="encoding">编码</param>
public void Export( string fileName, int[] columnIndexList, string[] headers, ExportFormat exportFormat, Encoding encoding)
{
DataTable dt = GetDataTable();
Helper.Common.Export(dt, columnIndexList, headers, exportFormat, fileName, encoding);
}
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">输出文件名</param>
/// <param name="columnNameList">导出的列的列名数组</param>
/// <param name="headers">导出的列标题数组</param>
/// <param name="exportFormat">导出文件的格式</param>
/// <param name="encoding">编码</param>
public void Export( string fileName, string[] columnNameList, string[] headers, ExportFormat exportFormat, Encoding encoding)
{
DataTable dt = GetDataTable();
Helper.Common.Export(dt, columnNameList, headers, exportFormat, fileName, encoding);
}
/// <summary>
/// 获取数据源(DataTable)
/// </summary>
private DataTable GetDataTable()
{
DataTable dt = null;
if ( this._dataSourceObject is DataTable)
dt = (DataTable) this._dataSourceObject;
else if ( this._dataSourceObject is DataSet)
dt = ((DataSet) this._dataSourceObject).Tables[0];
else
throw new InvalidCastException( "若要导出SmartGridView,应保证其数据源为DataTable或DataSet类型");
if (dt == null)
throw new ArgumentNullException( "数据源", "数据源不能为NULL");
return dt;
}
}
}
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Web.UI.WebControls;
namespace YYControls
{
/// <summary>
/// SmartGridView类的属性部分
/// </summary>
public partial class SmartGridView
{
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">文件名</param>
/// <param name="exportFormat">导出文件的格式</param>
/// <param name="encoding">编码</param>
public void Export( string fileName, ExportFormat exportFormat, Encoding encoding)
{
DataTable dt = GetDataTable();
Helper.Common.Export(dt, exportFormat, fileName, encoding);
}
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">文件名</param>
/// <param name="exportFormat">导出文件的格式</param>
public void Export( string fileName, ExportFormat exportFormat)
{
Export(fileName, exportFormat, Encoding.GetEncoding( "GB2312"));
}
/// <summary>
/// 导出SmartGridView的数据源的数据为Excel
/// </summary>
/// <param name="fileName">文件名</param>
public void Export( string fileName)
{
Export(fileName, ExportFormat.CSV);
}
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">输出文件名</param>
/// <param name="columnIndexList">导出的列索引数组</param>
/// <param name="exportFormat">导出文件的格式</param>
/// <param name="encoding">编码</param>
public void Export( string fileName, int[] columnIndexList, ExportFormat exportFormat, Encoding encoding)
{
DataTable dt = GetDataTable();
Helper.Common.Export(dt, columnIndexList, exportFormat, fileName, encoding);
}
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">输出文件名</param>
/// <param name="columnNameList">导出的列的列名数组</param>
/// <param name="exportFormat">导出文件的格式</param>
/// <param name="encoding">编码</param>
public void Export( string fileName, string[] columnNameList, ExportFormat exportFormat, Encoding encoding)
{
DataTable dt = GetDataTable();
Helper.Common.Export(dt, columnNameList, exportFormat, fileName, encoding);
}
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">输出文件名</param>
/// <param name="columnIndexList">导出的列索引数组</param>
/// <param name="headers">导出的列标题数组</param>
/// <param name="exportFormat">导出文件的格式</param>
/// <param name="encoding">编码</param>
public void Export( string fileName, int[] columnIndexList, string[] headers, ExportFormat exportFormat, Encoding encoding)
{
DataTable dt = GetDataTable();
Helper.Common.Export(dt, columnIndexList, headers, exportFormat, fileName, encoding);
}
/// <summary>
/// 导出SmartGridView的数据源的数据
/// </summary>
/// <param name="fileName">输出文件名</param>
/// <param name="columnNameList">导出的列的列名数组</param>
/// <param name="headers">导出的列标题数组</param>
/// <param name="exportFormat">导出文件的格式</param>
/// <param name="encoding">编码</param>
public void Export( string fileName, string[] columnNameList, string[] headers, ExportFormat exportFormat, Encoding encoding)
{
DataTable dt = GetDataTable();
Helper.Common.Export(dt, columnNameList, headers, exportFormat, fileName, encoding);
}
/// <summary>
/// 获取数据源(DataTable)
/// </summary>
private DataTable GetDataTable()
{
DataTable dt = null;
if ( this._dataSourceObject is DataTable)
dt = (DataTable) this._dataSourceObject;
else if ( this._dataSourceObject is DataSet)
dt = ((DataSet) this._dataSourceObject).Tables[0];
else
throw new InvalidCastException( "若要导出SmartGridView,应保证其数据源为DataTable或DataSet类型");
if (dt == null)
throw new ArgumentNullException( "数据源", "数据源不能为NULL");
return dt;
}
}
}
/*正式版的实现 结束*/
/*测试版的实现 开始*/
介绍
把GridView导出为一个Excel文件算是一个经常要用到的功能,也比较简单,我们来扩展一个GridView以实现这样的功能。
控件开发
1、新建一个继承自GridView的类。
把GridView导出为一个Excel文件算是一个经常要用到的功能,也比较简单,我们来扩展一个GridView以实现这样的功能。
控件开发
1、新建一个继承自GridView的类。
/// <summary>
/// 继承自GridView
/// </summary>
[ToolboxData( @"<{0}:SmartGridView runat='server'></{0}:SmartGridView>")]
public class SmartGridView : GridView
{
}
/// 继承自GridView
/// </summary>
[ToolboxData( @"<{0}:SmartGridView runat='server'></{0}:SmartGridView>")]
public class SmartGridView : GridView
{
}
2、重写OnRowCommand,以实现把GridView导出为Excel的功能
/// <summary>
/// OnRowCommand
/// </summary>
/// <param name="e"></param>
protected override void OnRowCommand(GridViewCommandEventArgs e)
{
if (e.CommandName.ToLower() == "exporttoexcel")
{
System.Web.HttpContext.Current.Response.ClearContent();
// e.CommandArgument用“;”隔开两部分,左边的部分为导出Excel的文件名称
System.Web.HttpContext.Current.Response.AddHeader( "content-disposition", "attachment; filename=" + e.CommandArgument.ToString().Split(';')[0] + ".xls");
System.Web.HttpContext.Current.Response.ContentType = "application/excel";
System.IO.StringWriter sw = new System.IO.StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
// e.CommandArgument用“;”隔开两部分,右边的部分为需要隐藏的列的索引(列索引用“,”分开)
if (e.CommandArgument.ToString().Split(';').Length > 1)
{
foreach ( string s in e.CommandArgument.ToString().Split(';')[1].Split(','))
{
int i;
if (!Int32.TryParse(s, out i))
{
throw new ArgumentException( "需要隐藏的列的索引不是整数");
}
if (i > this.Columns.Count)
{
throw new ArgumentOutOfRangeException( "需要隐藏的列的索引超出范围");
}
this.Columns[i].Visible = false;
}
}
// 隐藏“导出Excel”按钮
((Control)e.CommandSource).Visible = false;
// 如果HeaderRow里的控件是button的话,则把它替换成文本
foreach (TableCell tc in this.HeaderRow.Cells)
{
// TableCell里的每个Control
foreach (Control c in tc.Controls)
{
// 如果控件继承自接口IButtonControl
if (c.GetType().GetInterface( "IButtonControl") != null && c.GetType().GetInterface( "IButtonControl").Equals( typeof(IButtonControl)))
{
// 如果该控件不是“导出Excel”按钮则把button转换成文本
if (!c.Equals(e.CommandSource))
{
tc.Controls.Clear();
tc.Text = ((IButtonControl)c).Text;
}
}
}
}
// 将服务器控件的内容输出到所提供的 System.Web.UI.HtmlTextWriter 对象中
this.RenderControl(htw);
System.Web.HttpContext.Current.Response.Write(sw.ToString());
System.Web.HttpContext.Current.Response.End();
}
base.OnRowCommand(e);
}
/// OnRowCommand
/// </summary>
/// <param name="e"></param>
protected override void OnRowCommand(GridViewCommandEventArgs e)
{
if (e.CommandName.ToLower() == "exporttoexcel")
{
System.Web.HttpContext.Current.Response.ClearContent();
// e.CommandArgument用“;”隔开两部分,左边的部分为导出Excel的文件名称
System.Web.HttpContext.Current.Response.AddHeader( "content-disposition", "attachment; filename=" + e.CommandArgument.ToString().Split(';')[0] + ".xls");
System.Web.HttpContext.Current.Response.ContentType = "application/excel";
System.IO.StringWriter sw = new System.IO.StringWriter();
HtmlTextWriter htw = new HtmlTextWriter(sw);
// e.CommandArgument用“;”隔开两部分,右边的部分为需要隐藏的列的索引(列索引用“,”分开)
if (e.CommandArgument.ToString().Split(';').Length > 1)
{
foreach ( string s in e.CommandArgument.ToString().Split(';')[1].Split(','))
{
int i;
if (!Int32.TryParse(s, out i))
{
throw new ArgumentException( "需要隐藏的列的索引不是整数");
}
if (i > this.Columns.Count)
{
throw new ArgumentOutOfRangeException( "需要隐藏的列的索引超出范围");
}
this.Columns[i].Visible = false;
}
}
// 隐藏“导出Excel”按钮
((Control)e.CommandSource).Visible = false;
// 如果HeaderRow里的控件是button的话,则把它替换成文本
foreach (TableCell tc in this.HeaderRow.Cells)
{
// TableCell里的每个Control
foreach (Control c in tc.Controls)
{
// 如果控件继承自接口IButtonControl
if (c.GetType().GetInterface( "IButtonControl") != null && c.GetType().GetInterface( "IButtonControl").Equals( typeof(IButtonControl)))
{
// 如果该控件不是“导出Excel”按钮则把button转换成文本
if (!c.Equals(e.CommandSource))
{
tc.Controls.Clear();
tc.Text = ((IButtonControl)c).Text;
}
}
}
}
// 将服务器控件的内容输出到所提供的 System.Web.UI.HtmlTextWriter 对象中
this.RenderControl(htw);
System.Web.HttpContext.Current.Response.Write(sw.ToString());
System.Web.HttpContext.Current.Response.End();
}
base.OnRowCommand(e);
}
控件使用
添加这个控件到工具箱里,然后拖拽到webform上,在GridView内加一个按钮,把CommandName属性设置为“ExportToExcel”,CommandArgument属性的值用“;”做分隔符分为两部分,左边的部分为导出Excel的文件名称,右边的部分为需要隐藏的列的索引(列索引用“,”分开)
ObjData.cs
添加这个控件到工具箱里,然后拖拽到webform上,在GridView内加一个按钮,把CommandName属性设置为“ExportToExcel”,CommandArgument属性的值用“;”做分隔符分为两部分,左边的部分为导出Excel的文件名称,右边的部分为需要隐藏的列的索引(列索引用“,”分开)
ObjData.cs
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.ComponentModel;
/// <summary>
/// OjbData 的摘要说明
/// </summary>
public class OjbData
{
public OjbData()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
[DataObjectMethod(DataObjectMethodType.Select, true)]
public DataTable Select()
{
DataTable dt = new DataTable();
dt.Columns.Add( "no", typeof( string));
dt.Columns.Add( "name", typeof( string));
for ( int i = 0; i < 30; i++)
{
DataRow dr = dt.NewRow();
dr[0] = "no" + i.ToString().PadLeft(2, '0');
dr[1] = "name" + i.ToString().PadLeft(2, '0');
dt.Rows.Add(dr);
}
return dt;
}
}
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.ComponentModel;
/// <summary>
/// OjbData 的摘要说明
/// </summary>
public class OjbData
{
public OjbData()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
[DataObjectMethod(DataObjectMethodType.Select, true)]
public DataTable Select()
{
DataTable dt = new DataTable();
dt.Columns.Add( "no", typeof( string));
dt.Columns.Add( "name", typeof( string));
for ( int i = 0; i < 30; i++)
{
DataRow dr = dt.NewRow();
dr[0] = "no" + i.ToString().PadLeft(2, '0');
dr[1] = "name" + i.ToString().PadLeft(2, '0');
dt.Rows.Add(dr);
}
return dt;
}
}
Default.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>SmartGridView测试</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<yyc:SmartGridView ID="SmartGridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="ObjectDataSource1">
<Columns>
<asp:TemplateField ItemStyle-Width="50px">
<headertemplate>
<asp:Button id="btnExportToExcel" runat="server" Text="Excel" CommandName="ExportToExcel" CommandArgument="ExcelFileName;5,6" />
</headertemplate>
<itemtemplate>
<%# Container.DataItemIndex + 1 %>
</itemtemplate>
</asp:TemplateField>
<asp:BoundField DataField="no" HeaderText="序号" SortExpression="no" ItemStyle-Width="100px" />
<asp:BoundField DataField="name" HeaderText="名称" SortExpression="name" ItemStyle-Width="100px" />
<asp:BoundField DataField="no" HeaderText="序号" SortExpression="no" ItemStyle-Width="100px" />
<asp:BoundField DataField="name" HeaderText="名称" SortExpression="name" ItemStyle-Width="100px" />
<asp:BoundField DataField="no" HeaderText="序号" SortExpression="no" ItemStyle-Width="100px" />
<asp:BoundField DataField="name" HeaderText="名称" SortExpression="name" ItemStyle-Width="100px" />
</Columns>
</yyc:SmartGridView>
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="Select"
TypeName="OjbData"></asp:ObjectDataSource>
</div>
</form>
</body>
</html>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>SmartGridView测试</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<yyc:SmartGridView ID="SmartGridView1" runat="server" AutoGenerateColumns="False"
DataSourceID="ObjectDataSource1">
<Columns>
<asp:TemplateField ItemStyle-Width="50px">
<headertemplate>
<asp:Button id="btnExportToExcel" runat="server" Text="Excel" CommandName="ExportToExcel" CommandArgument="ExcelFileName;5,6" />
</headertemplate>
<itemtemplate>
<%# Container.DataItemIndex + 1 %>
</itemtemplate>
</asp:TemplateField>
<asp:BoundField DataField="no" HeaderText="序号" SortExpression="no" ItemStyle-Width="100px" />
<asp:BoundField DataField="name" HeaderText="名称" SortExpression="name" ItemStyle-Width="100px" />
<asp:BoundField DataField="no" HeaderText="序号" SortExpression="no" ItemStyle-Width="100px" />
<asp:BoundField DataField="name" HeaderText="名称" SortExpression="name" ItemStyle-Width="100px" />
<asp:BoundField DataField="no" HeaderText="序号" SortExpression="no" ItemStyle-Width="100px" />
<asp:BoundField DataField="name" HeaderText="名称" SortExpression="name" ItemStyle-Width="100px" />
</Columns>
</yyc:SmartGridView>
<asp:ObjectDataSource ID="ObjectDataSource1" runat="server" SelectMethod="Select"
TypeName="OjbData"></asp:ObjectDataSource>
</div>
</form>
</body>
</html>
注:为了防止出错要在.cs代码中加上下面这句
public
override
void VerifyRenderingInServerForm(Control control)
{
}
{
}
另外,如果你的GridView中含有命令按钮的话要在.aspx页面的头部中加上下面这个属性
EnableEventValidation=
"false"
/*测试版的实现 结束*/
OK
[源码下载]
本文转自webabcd 51CTO博客,原文链接:http://blog.51cto.com/webabcd/345538,如需转载请自行联系原作者