web页面导出标准word/excel/txt文件

最新推荐文章于 2025-06-21 12:44:43 发布

原创最新推荐文章于 2025-06-21 12:44:43 发布 · 8.3k 阅读

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CC 4.0 BY-SA版权

文章标签：

#web #dataset #string #excel #byte #null

本文介绍了如何将GridView中的数据导出为Excel、Word和TXT文件。通过设置HttpResponse对象的Header和ContentType，结合HtmlTextWriter将GridView渲染成字符串，然后保存为文件并提供下载。同时，针对以0开头的字符串问题，提供了保护格式的解决方案，并讨论了在框架内导出的注意事项。

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最近有时间把一些关于GridView集合里的数据导出到Excel或Word文件的代码实现。为了方便以后查阅和学习。

1.导出Excel:

public void Export()
{

string FileName="文件名称";
System.Web.HttpResponse httpResponse = Page.Response;

        httpResponse.AppendHeader("Content-Disposition", "attachment;filename="+     HttpUtility.UrlEncode(FileName, System.Text.Encoding.UTF8));         httpResponse.ContentEncoding = System.Text.Encoding.GetEncoding("GB2312");
        httpResponse.ContentType = "application/ms-excel";
        System.IO.StringWriter tw = new System.IO.StringWriter();
        System.Web.UI.HtmlTextWriter hw = new System.Web.UI.HtmlTextWriter(tw);

        this.GridView_selec.AllowPaging = false;
        if (ViewState["ds"] != null)
        {
            GridView_selec.DataSource = ViewState["ds"];
            GridView_selec.DataBind();

if (GridView_selec.Rows.Count > 0)
{

                if (GridView_selec.HeaderRow != null)
                {
                    this.GridView_selec.HeaderRow.Cells.RemoveAt(GridView_selec.HeaderRow.Cells.Count - 1);
                    this.GridView_selec.HeaderRow.Cells.RemoveAt(GridView_selec.HeaderRow.Cells.Count - 1);
                    for (int i = 0; i < GridView_selec.Rows.Count; i++)
                    {
                        GridView_selec.Rows[i].Cells.RemoveAt(GridView_selec.Rows[i].Cells.Count - 1);
                        GridView_selec.Rows[i].Cells.RemoveAt(GridView_selec.Rows[i].Cells.Count - 1);
                    }

                }
            }
        }

GridView_selec.RenderControl(hw);

        string filePath = page.Server.MapPath("..") + "//Temp//" + FileName;
        System.IO.StreamWriter sw = System.IO.File.CreateText(filePath);
        sw.Write(tw.ToString());
        sw.Close();

DownFile(httpResponse, FileName, filePath);

httpResponse.End();

GridView_selec.AllowPaging = true;

        GridView_selec.DataSource = ViewState["ds"];
        GridView_selec.DataBind();
    }
    private static bool DownFile(System.Web.HttpResponse Response, string fileName, string fullPath)
    {
        try
        {
            Response.ContentType = "application/octet-stream";

            Response.AppendHeader("Content-Disposition", "attachment;filename=" +
            HttpUtility.UrlEncode(fileName, System.Text.Encoding.UTF8) + ";charset=GB2312");
            System.IO.FileStream fs = System.IO.File.OpenRead(fullPath);
            long fLen = fs.Length;
            int size = 102400;
            byte[] readData = new byte[size];//指定缓冲区的大小
            if (size > fLen) size = Convert.ToInt32(fLen);
            long fPos = 0;
            bool isEnd = false;
            while (!isEnd)
            {
                if ((fPos + size) > fLen)
                {
                    size = Convert.ToInt32(fLen - fPos);
                    readData = new byte[size];
                    isEnd = true;
                }
                fs.Read(readData, 0, size);
                Response.BinaryWrite(readData);
                fPos += size;
            }
            fs.Close();
            System.IO.File.Delete(fullPath);
            return true;
        }
        catch
        {
            return false;
        }
    }

2.导出Word：

把以下代码修改一下，便可以使用：httpResponse.ContentType = "application/ms-excel";

改为：httpResponse.ContentType = "application/ms-word";

3.导出txt纯文本格式：

public void ExportTxt()
    {
        string fileName = "temp";
        Response.Clear();
        Response.Buffer = false;
        Response.ContentEncoding = System.Text.Encoding.UTF8;
        Response.AppendHeader("Content-Disposition", "attachment;filename=" + Server.UrlEncode(fileName) + ".txt");
        Response.ContentType = "text/plain";
        this.EnableViewState = false;

string str = "";

        //需要把一个数据集合迭代，然后存入字符串变量
        if (ViewState["ds"] != null)
        {
            DataSet ds = (DataSet)ViewState["ds"];
            for (int m = 0; m < ds.Tables[0].Columns.Count; m++)
            {
                str += ds.Tables[0].Columns[m].ColumnName + "/t";
            }

            for (int i = 0; i < ds.Tables[0].Rows.Count; i++)
            {
                for (int j = 0; j < ds.Tables[0].Columns.Count; j++)
                {
                    str += ds.Tables[0].Rows[i][j].ToString() + "/t";
                }
                str += "/r/n";
            }
        }

Response.Write(str);
Response.End();

}

最后提示：如果导出数据有以0开头的字符串，需要做如下设置
    protected void GridView_selec_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow)
        {

//这里GridView1的第0列是需要保护的字符串
e.Row.Cells[0].Attributes.Add("style", "vnd.ms-excel.numberformat:@");

}
}

如果导出数据的页面放在母版页里或嵌套在其他框架之下，需要重写下面的方法

导出Excel时重写方法

    public override void VerifyRenderingInServerForm(Control control)
    {
    }

注：部分代码网上搜索而得