复制代码 代码如下:

// Namespaces, Variables, and Constants
using System;
using System.Configuration;
using System.Data;
private OleDbDataAdapter da;
private DataTable dt;
private void Excel_Load(object sender, System.EventArgs e)
{
    // Create the DataAdapter.
    da = new OleDbDataAdapter(\"SELECT * FROM [Sheet1$]\", ConfigurationSettings.AppSettings[\"ExcelConnectString1\"]);
    // Create the insert command.
    String insertSql = \"INSERT INTO [Sheet1$] (CategoryID, CategoryName, Description) VALUES (?, ?, ?)\";
    da.InsertCommand = new OleDbCommand(insertSql, da.SelectCommand.Connection);
    da.InsertCommand.Parameters.Add(\"@CategoryID\", OleDbType.Integer, 0, \"CategoryID\");
    da.InsertCommand.Parameters.Add(\"@CategoryName\", OleDbType.Char, 15, \"CategoryName\");
    da.InsertCommand.Parameters.Add(\"@Description\", OleDbType.VarChar, 100, \"Description\");
    // Create the update command.
    String updateSql = \"UPDATE [Sheet1$] SET CategoryName=?, Description=? \" WHERE CategoryID=?\";
    da.UpdateCommand = new OleDbCommand(updateSql, da.SelectCommand.Connection);
    da.UpdateCommand.Parameters.Add(\"@CategoryName\", OleDbType.Char, 15, \"CategoryName\");
    da.UpdateCommand.Parameters.Add(\"@Description\", OleDbType.VarChar, 100, \"Description\");
    da.UpdateCommand.Parameters.Add(\"@CategoryID\", OleDbType.Integer, 0, \"CategoryID\");
    // Fill the table from the Excel spreadsheet.
    dt = new DataTable( );
    da.Fill(dt);
    // Define the primary key.
    dt.PrimaryKey = new DataColumn[] {dt.Columns[0]};
    // Records can only be inserted using this technique.
    dt.DefaultView.AllowDelete = false;
    dt.DefaultView.AllowEdit = true;
    dt.DefaultView.AllowNew = true;
    // Bind the default view of the table to the grid.
    dataGrid.DataSource = dt.DefaultView;
}
private void updateButton_Click(object sender, System.EventArgs e)
{
    da.Update(dt);
}