也不知道是否該應用這個控件,不過也想不出該用其他什麼控件,關鍵是俺比較菜沒什麼經驗。
要求是這樣的,用戶一次添加一個任務,這個任務有三個選項,其中兩個選項是用戶動態輸入的名稱(就象圖中bb和dd兩列),另一個選項則是一堆數據(就象qq那列),我現在要把每個任務羅列出來,不能用treeview,不能用tabcontrol,不能用xml,最好象個表格一樣清晰明朗(瘋了!)每個任務對應兩個按鈕,一個是Run,爲了跑任務,一個是Remove,爲了移除任務。
當然最開始選擇DataGridView就是爲了滿足那個“象表格一樣清晰明朗”的奇怪需求,一行對應一個任務,其次貌似DataGridView控件在.net 2.0中加入了新的特徵如DataGridViewButtonColumn啊,DataGridViewComboBoxColumn之類的東東。研究了一天才發現這兩個東東根本派不上用場,首先DataGridViewButtonColumn中的Button跟真的Button根本沒得比,既不能添加Button的Text也不好添加Click事件(應該是有方法的但還是很彆扭而且也沒研究);其次是DataGridViewComboBoxColumn,不僅外觀上不能和真正的ComboBox相提並論,而且當你選擇了其中的任一item,DataGridView就會新增一行,這跟我們的需求是完全不符合的,畢竟一個選項是不能代表一個任務的。
從網上查了很多資料,呵呵,看到一篇說可以畫個控件上去,覺得很有意思。其實我就是這麼做的。
(1)首先初始化DataGridView控件。
private void Form1_Load(object sender, EventArgs e)
{
DataGridViewCellStyle columnHeaderStyle = new DataGridViewCellStyle();
columnHeaderStyle.BackColor = Color.Beige;
columnHeaderStyle.Font = new Font("Verdana", 10, FontStyle.Bold);
dataGridView1.ColumnHeadersDefaultCellStyle = columnHeaderStyle;
this.dataGridView1.Columns.Add("1", "bb");
this.dataGridView1.Columns.Add("2", "qq");
this.dataGridView1.Columns.Add("3", "dd");
this.dataGridView1.Columns.Add("4", "aa");
}
(2)單擊按鈕添加一行,包括單元格和單元格的值,看似內嵌在單元格中的按鈕和下拉列表
private void button4_Click(object sender, EventArgs e)
{
DataGridViewRow dr = new DataGridViewRow();
foreach (DataGridViewColumn c in this.dataGridView1.Columns)
{
dr.Cells.Add(c.CellTemplate.Clone() as DataGridViewCell); //給行添加單元格
}
dr.Cells[0].Value = "1111";
dr.Cells[2].Value = "3333";
this.dataGridView1.Rows.Add(dr);
int index = this.dataGridView1.Rows.Count - 2;
ComboBox com = new ComboBox();
com.Name = "Containers" + index.ToString(); ;
com.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
com.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
com.Items.AddRange(new object[] {
"1",
"2",
"3",
"4"});
com.SelectedIndex = 0;
this.dataGridView1.Controls.Add(com);
this.dataGridView1.Columns[1].Width = com.Width;
com.Location = new System.Drawing.Point(((this.dataGridView1.GetCellDisplayRectangle(1, index, true).Right) - (com.Width)), this.dataGridView1.GetCellDisplayRectangle(1, index, true).Y);
Button btn1 = new Button();
btn1.Name = "btnRun" + index.ToString(); ;
btn1.Text = "Run";
btn1.Click+=new EventHandler(btn1_Click);
Button btn2 = new Button();
btn2.Name = "btnRemove"+index.ToString();
btn2.Text = "Remove";
btn2.Click+=new EventHandler(btn2_Click);
this.dataGridView1.Controls.Add(btn1);
this.dataGridView1.Controls.Add(btn2);
this.dataGridView1.Columns[3].Width = btn1.Width + btn2.Width + 6;
btn1.Location = new System.Drawing.Point(((this.dataGridView1.GetCellDisplayRectangle(3, index, true).Left)), this.dataGridView1.GetCellDisplayRectangle(3, index, true).Y);
btn2.Location = new System.Drawing.Point(((this.dataGridView1.GetCellDisplayRectangle(3, index, true).Right-1) - (btn2.Width)), this.dataGridView1.GetCellDisplayRectangle(3, index, true).Y);
}
(3)爲(2)中生成的Run按鈕和Remove按鈕添加單擊事件處理程序
public void btn1_Click(object sender, EventArgs e)
{
this.richTextBox1.Text = "";
Button btn = (Button)(sender);
//這個btn的name是btnRun打頭的
string suffix = btn.Name.ToString().Substring(6); //後邊那個號,相當於index的string
Control c = findControlByName(suffix);
if (c != null)
{
ComboBox com = (ComboBox)(c);
//Control ctl1 = this.dataGridView1.Controls["Containers" + i.ToString()];
//ComboBox com = (ComboBox)ctl1; 其實這樣寫更簡單點
for (int i = 0; i < com.Items.Count; i++)
{
this.richTextBox1.Text += com.Items[i].ToString() + "\n";
}
}
}
public void btn2_Click(object sender, EventArgs e)
{
int RowCount = this.dataGridView1.Rows.Count;
Button btn = (Button)(sender);
//這個btn的name是btnRemove打頭的
string suffix = btn.Name.ToString().Substring(9); //後邊那個號,相當於index的string
this.dataGridView1.Controls.RemoveByKey(btn.Name);
this.dataGridView1.Controls.RemoveByKey("btnRun" + suffix);
this.dataGridView1.Controls.RemoveByKey("Containers" + suffix);
int index = Convert.ToInt32(suffix);
this.dataGridView1.Rows.RemoveAt(index);
if (index < RowCount - 2)
{
for (int i = index + 1; i < RowCount - 1; i++)
{
Control ctl1 = this.dataGridView1.Controls["Containers" + i.ToString()];
Control ctl2 = this.dataGridView1.Controls["btnRun" + i.ToString()];
Control ctl3 = this.dataGridView1.Controls["btnRemove" + i.ToString()];
ComboBox com = (ComboBox)ctl1;
Button btnRun = (Button)ctl2;
Button btnRemove = (Button)ctl3;
//上移一格,單元格Height位4,Button的Height爲23
com.Location = new System.Drawing.Point(com.Location.X, com.Location.Y - 23);
btnRun.Location = new System.Drawing.Point(btnRun.Location.X, btnRun.Location.Y - 23);
btnRemove.Location = new System.Drawing.Point(btnRemove.Location.X, btnRemove.Location.Y - 23);
//改名字的後綴
int j=i-1;
com.Name = "Containers" + j.ToString();
btnRun.Name = "btnRun" + j.ToString();
btnRemove.Name = "btnRemove" + j.ToString();
}
}
}
(4)btn1_Click處理中用到的函數findControlByName()
public Control findControlByName(string suffix)
{
foreach (System.Windows.Forms.Control c in this.dataGridView1.Controls)
{
if (c.Name == "Containers" + suffix)
return c;
}
return null;
}