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C# DataGridView 添加Button -转

2014-01-02 15:20 281 查看
也不知道是否该应用这个控件,不过也想不出该用其他什么控件,关键是俺比较菜没什么经验。

要求是这样的,用户一次添加一个任务,这个任务有三个选项,其中两个选项是用户动态输入的名称(就象图中bb和dd两列),另一个选项则是一堆数据(就象qq那列),我现在要把每个任务罗列出来,不能用treeview,不能用tabcontrol,不能用xml,最好象个表格一样清晰明朗(疯了!)每个任务对应两个按钮,一个是Run,为了跑任务,一个是Remove,为了移除任务。



当然最开始选择DataGridView就是为了满足那个“象表格一样清晰明朗”的奇怪需求,一行对应一个任务,其次貌似DataGridView控件在.net 2.0中加入了新的特征如DataGridViewButtonColumn啊,DataGridViewComboBoxColumn之类的东东。研究了一天才发现这两个东东根本派不上用场,首先DataGridViewButtonColumn中的Button跟真的Button根本没得比,既不能添加Button的Text也不好添加Click事件(应该是有方法的但还是很别扭而且也没研究);其次是DataGridViewComboBoxColumn,不仅外观上不能和真正的ComboBox相提并论,而且当你选择了其中的任一item,DataGridView就会新增一行,这跟我们的需求是完全不符合的,毕竟一个选项是不能代表一个任务的。

从网上查了很多资料,呵呵,看到一篇说可以画个控件上去,觉得很有意思。其实我就是这么做的。

(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)单击按钮添加一行,包括单元格和单元格的值,看似内嵌在单元格中的按钮和下拉列表



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); //给行添加单元格

}

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)为(2)中生成的Run按钮和Remove按钮添加单击事件处理程序



public void btn1_Click(object sender, EventArgs e)

{

this.richTextBox1.Text = "";

Button btn = (Button)(sender);

//这个btn的name是btnRun打头的

string suffix = btn.Name.ToString().Substring(6); //后边那个号,相当于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;  其实这样写更简单点

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);

//这个btn的name是btnRemove打头的

string suffix = btn.Name.ToString().Substring(9); //后边那个号,相当于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,单元格Height位4,Button的Height为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);

//改名字的后缀

int j=i-1;

com.Name = "Containers" + j.ToString();

btnRun.Name = "btnRun" + j.ToString();

btnRemove.Name = "btnRemove" + j.ToString();

}

}

}




(4)btn1_Click处理中用到的函数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;

}
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