我需要能够在用户单击按钮时生成从SqlDataSource / GridView返回的结果的基本CSV文件,然后允许他们保存此文件。
这样做很简单吗?
由于
答案 0 :(得分:1)
由于您使用的是SqlDataSource,因此您可以像这样从中获取DataTable:
var dv = new DataView();
var dt = new DataTable();
dv = (DataView)mySQLDataSource.Select(DataSourceSelectArguments.Empty);
dt = dv.ToTable();
我写了一组extension methods to do DataTable to CSV,你应该可以轻松使用它。
其余代码非常简单:
var csv = dt.ToCSV();
以下是使用此方法的完整示例。
标记:
<%@ Page Title="Home Page" Language="C#" MasterPageFile="~/Site.master" AutoEventWireup="true"
CodeBehind="Default.aspx.cs" Inherits="SO.WebUI._Default" %>
<asp:Content ID="HeaderContent" runat="server" ContentPlaceHolderID="HeadContent">
</asp:Content>
<asp:Content ID="BodyContent" runat="server" ContentPlaceHolderID="MainContent">
<asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False" DataKeyNames="EmployeeId"
DataSourceID="SqlDataSourceLocal">
<Columns>
<asp:BoundField DataField="EmployeeId" HeaderText="EmployeeId" InsertVisible="False"
ReadOnly="True" SortExpression="EmployeeId" Visible="False" />
<asp:BoundField DataField="Name" HeaderText="Name" SortExpression="Name" />
<asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />
<asp:BoundField DataField="Birthdate" HeaderText="Birthdate" SortExpression="Birthdate" />
</Columns>
</asp:GridView>
<!-- This is the button to export CSV! -->
<asp:Button ID="btnToCSV" runat="server" Text="Export to CSV" OnClick="GetCSV" />
<asp:SqlDataSource ID="SqlDataSourceLocal" runat="server"
ConnectionString="<%$ ConnectionStrings:StackOverflowExamplesConnectionString %>"
SelectCommand="SELECT * FROM [Employee]"></asp:SqlDataSource>
</asp:Content>
代码隐藏:
public partial class _Default : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
public void GetCSV(object sender, EventArgs e)
{
DataView dv = (DataView)SqlDataSourceLocal.Select(DataSourceSelectArguments.Empty);
var dt = dv.ToTable();
var csv = dt.ToCSV();
WriteToOutput(csv, "export.csv", "text/csv");
}
private void WriteToOutput(String csv, String fileName, String mimeType)
{
Response.Clear();
Response.ContentType = mimeType;
Response.AddHeader("Content-Disposition", String.Format("attachment;filename={0}", fileName));
Response.Write(csv);
Response.End();
}
}
你去吧。这里没有包含的唯一内容是扩展方法源代码,但是由于我已经链接到它,所以在将它转换为静态类时应该没有问题。
答案 1 :(得分:0)
对于GridView,您可以使用它:
StreamWriter writer = new StreamWriter("file.csv");
// Write columns
writer.Write(myGridView.Columns[0].HeaderText);
for (int i = 1; i < myGridView.Columns.Count; i++)
writer.Write("," + myGridView.Columns[i].HeaderText);
writer.Write("\n");
// Write values
for (int x = 0; x < myGridView.Rows.Count; x++)
{
writer.Write(myGridView.Rows[x].Cells[0].Text);
for (int i = 1; i < myGridView.Rows[x].Cells.Count; i++)
writer.Write("," + myGridView.Rows[x].Cells[i].Text);
writer.Write("\n");
}
writer.Close();
答案 2 :(得分:0)
private void button13_Click(object sender,EventArgs e)//导出到.csv { // OnExportGridToCSV();
StreamWriter writer = new StreamWriter("C:\\scripts\\file.csv");
// Write columns
writer.Write(dataGridView1.Columns[0].HeaderText);
for (int i = 1; i < dataGridView1.Columns.Count; i++)
writer.Write("," + dataGridView1.Columns[i].HeaderText);
writer.Write("\n");
// Write values
for (int x = 0; x < dataGridView1.Rows.Count; x++)
{
writer.Write(dataGridView1.Rows[x].Cells[0].FormattedValue.ToString());
for (int i = 1; i < dataGridView1.Rows[x].Cells.Count; i++)
writer.Write("," + dataGridView1.Rows[x].Cells[i].FormattedValue.ToString());
writer.Write("\n");
textBox5.Text = ("Row " + (x + 1).ToString() + " of " + dataGridView1.Rows.Count + " exported."); // progress indicator
}
writer.Close();
// open up the newly created file in excel
Process proc = new Process();
proc.StartInfo = new ProcessStartInfo("excel.exe", "C:\\scripts\\file.csv");
proc.Start();
}