Question

大家好我想通过带有按钮的datagridview将数据保存到数据库但是每次运行应用程序时都会出现以下错误：这是我的代码：

        DataTable Table = new DataTable(); 
        BindingSource bindingSource1 = new BindingSource();
 string connetionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:/Database/Database.accdb;";
        string sql = "SELECT * FROM IAE;";
        OleDbConnection connection = new OleDbConnection(connetionString);
        OleDbDataAdapter dataadapter = new OleDbDataAdapter(sql, connection);
        OleDbCommandBuilder cb = new OleDbCommandBuilder(dataadapter);
        DataSet ds = new DataSet();
        connection.Open();
        dataGridView1.DataSource = ds.Tables["IAE"];
        dataadapter.Update((DataTable)bindingSource1.DataSource);
        connection.Close();

错误：值不能为空。参数名称：dataTable

需要你的帮助和谢谢

Answer 1

错误原因是您的bindingSource1.DataSource属性为NULL。您没有将任何DATASOURCE分配给您的bindingsource类

通过DataGridView更新MS Access数据库

1 个答案: