c# - DataGridView.Datasource = null;错误: Object reference not set to an instance of an object

Question

我很困惑为什么将 datagridview 控件的数据源设置为 null 会导致“对象引用未设置到对象的实例”错误。提前致谢

while (xmlReader.Read())
{
    if ((xmlReader.NodeType == XmlNodeType.Element) && (xmlReader.Name == "deposits"))
    {
        oDeposit.DepAmt = Convert.ToDouble(xmlReader.GetAttribute("depamount"));
        oDeposit.DepDate = Convert.ToDateTime(xmlReader.GetAttribute("depdate"));
        oDeposit.DepositId = Convert.ToInt32(xmlReader.GetAttribute("depid"));

        oCustomer.addDeposits(oDeposit);
        **dgvDeposits.DataSource = null;**
        dgvDeposits.DataSource = oCustomer.Deposits;            
    }
}

Answer 1

您应该使用它而不是将 DataSource 设置为 null:

dgvDeposits.DataSource = typeof(Deposit);

请检查以下question它可能对您的异常有解释。