需要注意是：1，IMEX必须设置为2；2，该列的数据类型最好要一致。下面的例子更新B11单元格的内容。
ASPX 代码
<%@ Page Language="C#" Debug="true" %>
<%@ Import Namespace="System.Data" %>
<%@ Import Namespace="System.Data.OleDb" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
String ConnectionString = String.Empty;
protected void Page_Load(object sender, EventArgs e)
{
ConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Server.MapPath("excel.xls") + ";Extended Properties='Excel 8.0;HDR=No;IMEX=2;'";
if (!IsPostBack)
{
DataBindExcel();
}
}
protected void UpDate_Click(object sender, EventArgs e)
{
using (OleDbConnection cn = new OleDbConnection(ConnectionString))
{
cn.Open();
String sql = "UPDATE [Sheet1$B11:B11] SET F1 = '" + DateTime.Now.ToString() + "'";
OleDbCommand cmd = new OleDbCommand(sql, cn);
cmd.ExecuteNonQuery();
cn.Dispose();
}
Response.Redirect(Request.UrlReferrer.ToString());
}
private void DataBindExcel()
{
using (OleDbConnection cn = new OleDbConnection(ConnectionString))
{
cn.Open();
String sql = "select * FROM [Sheet1$]";
OleDbCommand cmd = new OleDbCommand(sql, cn);
GridView1.DataSource = cmd.ExecuteReader();
GridView1.DataBind();
cn.Dispose();
}
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
</head>
<body>
<form id="form1" runat="server">
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
<asp:Button ID="UpDate" Text="更新数据为当前日期" runat="server" OnClick="UpDate_Click" />
</form>
</body>
</html>
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