更新代码并查看结果.

Hi,

Update your code and see the result.

_localdt = new DataTable("GeneralInfo");
_localdt = PersonBLL.GetAddressesFromPerson(textBoxBranchName.Text);
dataGridViewAddresses.DataSource = _localdt.Tables["Addresses"]; //Check it you are getting data into this line. 

如果它不起作用，则使用下面的行来绑定数据.

And if it is not working then use below line to bind data.

dataGridViewAddresses.Grid.DataSource = localdt.Tables["Addresses"];

之后

dataGridViewAddresses.DataSource = _localdt.Tables["Addresses"];
dataGridViewAddresses.Refresh();
DataBind();