我正在尝试动态创建groupbox，这些GB将在复选框上选择时创建。
意味着我现在有5个复选框，如果我选择第一个CB然后1 GB，其他动态复选框将被创建，如果我选择第三个检查，那么另一个GB将创建其他几个复选框。 为此，我尝试使用此代码，因为我能够为已在设计时创建的固定组框创建动态复选框。
我的方案是 - 5个分支有多个批次。现在，用户将从动态复选框中选择分支，并在此基础上，btaches将显示在每个分支的groupbox中。 Branch1 Branch2 Branch3 Branch4 Branch5如果用户选择第3和第5分支，则GB1将显示Branch3＆＃39; s批次，GB2将显示Branch5＆＃39; s批次 这是代码 -
private void RO_SelectedIndexChanged(object sender, EventArgs e)
{
groupBox1.Controls.Clear();
String m = RO.SelectedItem.ToString();
Console.WriteLine(m);
aCommand2 = new OleDbCommand("select * from branch_tbl,region_tbl where branch_tbl.region_id=region_tbl.region_id and region_tbl.region_name LIKE '"+m +"'", main_connection);
aAdapter2 = new OleDbDataAdapter(aCommand2);
ds2 = new DataSet();
aAdapter2.Fill(ds2, "app_info");
ds2.Tables[0].Constraints.Add("pk_bno", ds2.Tables[0].Columns[0], true);
int bran_count = ds2.Tables[0].Rows.Count;
Console.WriteLine(bran_count);
checkBox = new System.Windows.Forms.CheckBox[bran_count];
for (int i = 0; i < bran_count; ++i)
{
checkBox[i] = new CheckBox();
checkBox[i].Name = "radio" + Convert.ToString(i);
checkBox[i].Text = ds2.Tables[0].Rows[i][2].ToString();
checkBox[i].Location = new System.Drawing.Point(125 * i, 15);
groupBox1.Controls.Add(checkBox[i]);
checkBox[i].CheckStateChanged += new System.EventHandler(CheckBoxCheckedChanged);
}
}
int count = 1;
int position = 1;
//Code for handling event when branch check box is selected or unselected
private void CheckBoxCheckedChanged(object sender, EventArgs e)
{
CheckBox c = (CheckBox)sender;
//Label myLabel;
String str = null;
if (c.Checked == true)
{
str = c.Text;
aCommand3 = new OleDbCommand("select * from batch_tbl where batch_branch LIKE '" + str + "'", main_connection);
aAdapter3 = new OleDbDataAdapter(aCommand3);
ds3 = new DataSet();
aAdapter3.Fill(ds3, "app_info");
ds3.Tables[0].Constraints.Add("pk_bno", ds3.Tables[0].Columns[0], true);
int batch_count = ds3.Tables[0].Rows.Count;
//filling the groupbox with batch code by generating dynamic checkboxes
for (int i = 0; i < batch_count; ++i)
{
checkBox[i] = new CheckBox();
checkBox[i].Name = "check" + Convert.ToString(i);
checkBox[i].Text = ds3.Tables[0].Rows[i][1].ToString();
Console.WriteLine(checkBox[i].Text);
checkBox[i].Location = new System.Drawing.Point(104*position, 30);
groupBox2.Text = c.Text;
groupBox2.Controls.Add(checkBox[i]);
position++;
count++;
}
}
else
{
count--;
this.Controls.RemoveByKey("lbl" + c.Name);
this.Update();
}
}
这段代码很好但我不知道有多少分支CB会使用select，所以如何在设计时为每个选定的分支放置GB，因为他需要在运行时选择分支生成GB的复选框。
答案 0 :(得分：2)
我在思考问题后解决了我的问题。我刚刚完成了为生成动态复选框所做的工作。这是代码
private void RO_SelectedIndexChanged(object sender, EventArgs e)
{
groupBox1.Controls.Clear();
String m = RO.SelectedItem.ToString();
Console.WriteLine(m);
aCommand2 = new OleDbCommand("select * from branch_tbl,region_tbl where branch_tbl.region_id=region_tbl.region_id and region_tbl.region_name LIKE '" + m + "'", main_connection);
aAdapter2 = new OleDbDataAdapter(aCommand2);
ds2 = new DataSet();
aAdapter2.Fill(ds2, "app_info");
ds2.Tables[0].Constraints.Add("pk_bno", ds2.Tables[0].Columns[0], true);
int bran_count = ds2.Tables[0].Rows.Count;
Console.WriteLine(bran_count);
checkBox = new CheckBox[bran_count];
for (int i = 0; i < bran_count; ++i)
{
checkBox[i] = new CheckBox();
checkBox[i].Name = "radio" + Convert.ToString(i);
checkBox[i].Text = ds2.Tables[0].Rows[i][2].ToString();
checkBox[i].Location = new System.Drawing.Point(125 * i, 15);
groupBox1.Controls.Add(checkBox[i]);
checkBox[i].CheckStateChanged += new System.EventHandler(CheckBoxCheckedChanged);
}
gpBox=new GroupBox[bran_count];
}
String str = null;
int count = 1;
int gpcount = 1;
int position = 1;
int gpposition = 110;
//Code for handling event when branch check box is selected or unselected
private void CheckBoxCheckedChanged(object sender, EventArgs e)
{
CheckBox c = (CheckBox)sender;
//Label myLabel;
String str = null;
if (c.Checked == true)
{
str = c.Text;
gpBox[gpcount] = new GroupBox();
gpBox[gpcount].Name = "gpBox" + Convert.ToString(count);
gpBox[gpcount].Text = str;
gpBox[gpcount].Location = new Point(5, gpposition);
gpBox[gpcount].AutoSize = true;
this.Controls.Add(gpBox[gpcount]);
aCommand3 = new OleDbCommand("select * from batch_tbl where batch_branch LIKE '" + str + "'", main_connection);
aAdapter3 = new OleDbDataAdapter(aCommand3);
ds3 = new DataSet();
aAdapter3.Fill(ds3, "app_info");
ds3.Tables[0].Constraints.Add("pk_bno", ds3.Tables[0].Columns[0], true);
int batch_count = ds3.Tables[0].Rows.Count;
//filling the groupbox with batch code by generating dynamic checkboxes
for (int i = 0; i < batch_count; ++i)
{
checkBox[i] = new CheckBox();
checkBox[i].Name = "check" + Convert.ToString(i);
checkBox[i].Text = ds3.Tables[0].Rows[i][1].ToString();
Console.WriteLine(checkBox[i].Text);
checkBox[i].Location = new System.Drawing.Point(104 * position, 30);
gpBox[gpcount].Controls.Add(checkBox[i]);
position++;
count++;
}
position = 1;
gpposition += 100;
}
else
{
count--;
this.Controls.RemoveByKey("lbl" + c.Name);
this.Update();
}
}