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我创建了一个函数来获取查询字符串并GridView在.aspx页面中创建一个。这工作正常。我有一个导出到csv返回空文件的函数。SQLDataSource当我创建和GridView使用自动化工具时，我毫无问题地使用了这个功能。我相信导出到csv函数并没有从gridview网页上的动态中获取数据。我看不出我在哪里犯了错误。我怀疑我的功能很糟糕，因为我没有正确返回GridView.

protected void Page_Load(object sender, EventArgs e)
{
    btnBack.Click += new EventHandler(btnBack_Click);
    btnCSVDownload.Click += new EventHandler(btnCSVDownload_Click);

    lblLabel.Text = "some text";

    string selQuery = "SELECT * FROM Employees";

    SqlSelect(selQuery);
}

public string SqlSelect(string selStatement)
{
    lblSelectStatement.Text = selStatement;

    SqlConnection MyConnection = new SqlConnection();
    MyConnection.ConnectionString = ConfigurationManager.ConnectionStrings["datasource"].ConnectionString;
    SqlCommand MyCommand = new SqlCommand();
    MyCommand.CommandText = selStatement;
    MyCommand.CommandType = CommandType.Text;
    MyCommand.Connection = MyConnection;
    DataTable MyTable = new DataTable();
    SqlDataAdapter MyAdapter = new SqlDataAdapter();
    MyAdapter.SelectCommand = MyCommand;
    MyAdapter.Fill(MyTable);
    GridView1.DataSource = MyTable.DefaultView;
    GridView1.DataBind();
    MyAdapter.Dispose();
    MyCommand.Dispose();
    MyConnection.Dispose();

    return lblSelectStatement.Text;
}

protected void btnCSVDownload_Click(object sender, EventArgs e)
{  
    ExportToCsv(GridView1);
}

public void ExportToCsv(GridView grv)
{
    Response.Clear();
    Response.Buffer = true;
    Response.AddHeader("content-disposition",
    "attachment;filename=export.csv");
    Response.Charset = "";
    Response.ContentType = "application/text";

    grv.AllowPaging = false;
    grv.DataBind(); 

    StringBuilder sb = new StringBuilder();
    for (int k = 0; k < grv.Columns.Count; k++)
    {
        sb.Append(grv.Columns[k].HeaderText + ','); //add separator
    }
    sb.Append("\r\n"); //append new line
    for (int i = 0; i < grv.Rows.Count; i++)
    {
        for (int k = 0; k < grv.Columns.Count; k++)
        {
            grv.Rows[i].Cells[k].Text = ('"' + grv.Rows[i].Cells[k].Text + '"'); //add separator
            sb.Append(grv.Rows[i].Cells[k].Text + ',');
        }
        sb.Append("\r\n"); //append new line
    }
    Response.Output.Write(sb.ToString());
    Response.Flush();
    Response.End();
}
4

1 回答 1

0

确保您的 gridview 字段不是自动生成的，并且它们是绑定字段。

于 2013-02-14T14:13:58.560 回答