检索所选GridView行的基础数据项

MyEntityId SingleOrDefault

foreach(GridViewRow row in GridView1.Rows)
{
    CheckBox CheckBox1 = (CheckBox)gvrow.FindControl("CheckBox1"); 
    HiddenField HiddenField1 = (HiddenField)gvrow.FindControl("HiddenField1")
    if (CheckBox1.Checked) 
    { 
        // your code to get the entity here 
    }     
}