本文整理汇总了C#中DataSet.GetChanges方法的典型用法代码示例。如果您正苦于以下问题：C# DataSet.GetChanges方法的具体用法？C# DataSet.GetChanges怎么用？C# DataSet.GetChanges使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类DataSet的用法示例。
在下文中一共展示了DataSet.GetChanges方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C#代码示例。
示例1: GetChanges_ByDataRowState
public void GetChanges_ByDataRowState()
{
var ds = new DataSet();
object[] arrAdded, arrDeleted, arrModified, arrUnchanged;
//object[] arrDetached;
DataRow dr;
ds.Tables.Add(DataProvider.CreateParentDataTable());
// GetChanges 1
Assert.Equal(null, ds.GetChanges());
//make some changes
// can't check detached
// dr = ds.Tables[0].Rows[0];
// arrDetached = dr.ItemArray;
// dr.Delete();
// ds.Tables[0].AcceptChanges();
dr = ds.Tables[0].Rows[1];
arrDeleted = dr.ItemArray;
dr.Delete();
dr = ds.Tables[0].Rows[2];
dr[1] = "NewValue";
arrModified = dr.ItemArray;
dr = ds.Tables[0].Select("", "", DataViewRowState.Unchanged)[0];
arrUnchanged = dr.ItemArray;
dr = ds.Tables[0].NewRow();
dr[0] = 1;
ds.Tables[0].Rows.Add(dr);
arrAdded = dr.ItemArray;
// GetChanges Added
Assert.Equal(arrAdded, ds.GetChanges(DataRowState.Added).Tables[0].Rows[0].ItemArray);
// GetChanges Deleted
dr = ds.GetChanges(DataRowState.Deleted).Tables[0].Rows[0];
object[] tmp = new object[] { dr[0, DataRowVersion.Original], dr[1, DataRowVersion.Original], dr[2, DataRowVersion.Original], dr[3, DataRowVersion.Original], dr[4, DataRowVersion.Original], dr[5, DataRowVersion.Original] };
Assert.Equal(arrDeleted, tmp);
// can't check it
// // GetChanges Detached
// dr = ds.GetChanges(DataRowState.Detached).Tables[0].Rows[0];
// object[] tmp = new object[] {dr[0,DataRowVersion.Original],dr[1,DataRowVersion.Original],dr[2,DataRowVersion.Original]};
// Assert.Equal(arrDetached, tmp);
// GetChanges Modified
Assert.Equal(arrModified, ds.GetChanges(DataRowState.Modified).Tables[0].Rows[0].ItemArray);
// GetChanges Unchanged
Assert.Equal(arrUnchanged, ds.GetChanges(DataRowState.Unchanged).Tables[0].Rows[0].ItemArray);
}示例2: GetChanges_Relations_DifferentRowStatesTest
public void GetChanges_Relations_DifferentRowStatesTest()
{
DataSet ds = new DataSet("ds");
DataTable parent = ds.Tables.Add("parent");
DataTable child = ds.Tables.Add("child");
parent.Columns.Add("id", typeof(int));
parent.Columns.Add("name", typeof(string));
child.Columns.Add("id", typeof(int));
child.Columns.Add("parent", typeof(int));
child.Columns.Add("name", typeof(string));
parent.Rows.Add(new object[] { 1, "mono parent 1" });
parent.Rows.Add(new object[] { 2, "mono parent 2" });
parent.Rows.Add(new object[] { 3, "mono parent 3" });
parent.Rows.Add(new object[] { 4, "mono parent 4" });
parent.AcceptChanges();
child.Rows.Add(new object[] { 1, 1, "mono child 1" });
child.Rows.Add(new object[] { 2, 2, "mono child 2" });
child.Rows.Add(new object[] { 3, 3, "mono child 3" });
child.AcceptChanges();
DataRelation relation = ds.Relations.Add("parent_child",
parent.Columns["id"],
child.Columns["parent"]);
// modify the parent and get changes
child.Rows[1]["parent"] = 4;
DataSet changes = ds.GetChanges();
DataRow row = changes.Tables["parent"].Rows[0];
Assert.Equal((int)parent.Rows[3][0], (int)row[0]);
Assert.Equal(1, changes.Tables["parent"].Rows.Count);
ds.RejectChanges();
// delete a child row and get changes.
child.Rows[0].Delete();
changes = ds.GetChanges();
Assert.Equal(changes.Tables.Count, 2);
Assert.Equal(1, changes.Tables["parent"].Rows.Count);
Assert.Equal(1, (int)changes.Tables["parent"].Rows[0][0]);
}示例3: GetChanges
public void GetChanges()
{
var ds = new DataSet();
ds.Tables.Add(DataProvider.CreateParentDataTable());
// GetChanges 1
Assert.Equal(null, ds.GetChanges());
DataRow dr = ds.Tables[0].NewRow();
dr[0] = 9;
ds.Tables[0].Rows.Add(dr);
// GetChanges 2
Assert.Equal(true, ds.GetChanges() != null);
// GetChanges 3
Assert.Equal(dr.ItemArray, ds.GetChanges().Tables[0].Rows[0].ItemArray);
}