.NET DataSet.HasChanges错误地为false

Question

有没有人遇到ds.hasChanges()是假的,尽管ds在断点检查时显然有变化？我一直在看它已经有一段时间了,我看不出有什么问题......

// connectionstring and command has been set
DataSet ds = new DataSet();
BindingSource myBindingSource = new BindingSource();
SqlDataAdapter dataAdapter1 = new SqlDataAdapter();
dataAdapter1.Fill(ds, "Data");
myBindingSource.DataSource = ds.Tables["Data"];

// then changes made to the datatable on a windows form using bindingnavigator
ds.HasChanges(DataRowState.Modified); // is false

现在,当我在使用HasChanges的行之后设置断点并使用DataSet Visualizer时,我可以看到DataSet实际上已经改变,但HasChanges仍然返回false.

我敢肯定我错过了明显的......有人能看出我做错了吗？

干杯

Answer 1

首先尝试在BindingContext上调用EndCurrentEdit():

DataTable dt = ds.Tables["Data"];
this.BindingContext[dt].EndCurrentEdit();

if(ds.HasChanges(DataRowState.Modified))
{
  // do your stuff here
}

同时尝试调用myBindingSource.EndEdit()它将任何未提交的数据推送到DataTable.