我正在尝试动态创建组框,这些 GB 将在选中复选框时创建。
意味着我现在有 5 个复选框,如果我选择第 1 个 CB,则应创建 1 GB 和其他一些动态复选框,如果我选择第 3 个复选框,则应创建另一个 GB,并添加更多其他复选框。为此,我正在尝试使用此代码,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。
我的场景是 - 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,在此基础上,每个分支的组框中将显示 btache。Branch1 Branch2 Branch3 Branch4 Branch5 如果用户选择第 3 和第 5 个分支,则 GB1 将显示 Branch3 的批次,GB2 将显示 Branch5 的批次 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 将使用 select,所以我如何在设计时为每个选定的分支放置 GB,因为我需要在运行时在选择分支复选框时生成 GB。