玩转DataGridView之行的展开与收缩

发表于：2012-5-07 09:52

作者：Gyoung 来源：51Testing软件测试网采编

　　而在增加节点的时候，我们要多做一个判断，如果IsInsert为false就插入数据，如果为true就显示数据

　　展开行

if (this.dataGridView1.Columns[e.ColumnIndex].Name == "EX" && isEx=="false")
{
if (this.dataGridView1.Rows[e.RowIndex].Cells["IsInsert"].Value.ToString() == "false")
{
string id = this.dataGridView1.Rows[e.RowIndex].Cells["ID"].Value.ToString();
DataTable table = GetDataTable("select * from Department where DparentId=" + id);
if (table.Rows.Count > 0)
{
//插入行
this.dataGridView1.Rows.Insert(e.RowIndex + 1, table.Rows.Count);
for (int i = 0; i < table.Rows.Count; i++)
{
DataGridViewRow row = this.dataGridView1.Rows[e.RowIndex + i + 1];
row.DefaultCellStyle.BackColor = Color.CadetBlue;
row.Cells["ID"].Value = table.Rows[i]["ID"];
row.Cells["DName"].Value = table.Rows[i]["DName"];
row.Cells["Daddress"].Value = table.Rows[i]["Daddress"];
row.Cells["Dtelphone"].Value = table.Rows[i]["Dtelphone"];
}
this.dataGridView1.Rows[e.RowIndex].Cells["IsInsert"].Value = "true";
this.dataGridView1.Rows[e.RowIndex].Cells["RowCount"].Value = table.Rows.Count;
}
}
else
{
//显示数据
int RowCount = Convert.ToInt32(this.dataGridView1.Rows[e.RowIndex].Cells["RowCount"].Value);
for (int i = 1; i <= RowCount; i++)
{
this.dataGridView1.Rows[e.RowIndex + i].Visible = true;
}
}
//将IsEx设置为true，标明该节点已经展开
this.dataGridView1.Rows[e.RowIndex].Cells["IsEx"].Value = "true";
this.dataGridView1.Rows[e.RowIndex].Cells["EX"].Value = "-";
}

　　收缩的时候，我们直接隐藏行就可以了。

　　收缩行

if (this.dataGridView1.Columns[e.ColumnIndex].Name == "EX" && isEx == "true")
{
int RowCount = Convert.ToInt32(this.dataGridView1.Rows[e.RowIndex].Cells["RowCount"].Value);
for (int i = 1; i <= RowCount; i++)
{
//隐藏行
this.dataGridView1.Rows[e.RowIndex + i].Visible = false;
}
////将IsEx设置为false，标明该节点已经收缩
this.dataGridView1.Rows[e.RowIndex].Cells["IsEx"].Value = "false";
this.dataGridView1.Rows[e.RowIndex].Cells["EX"].Value = "+";
}

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