protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
ViewState["Count"] = 1;
else
{
if (ViewState["ADD"] != null
&& (bool)this.ViewState["ADD"] == true)
{
AddDropDownList();
}
}
}
//動態增加控制項
protected void btnDemo_Click(object sender, EventArgs e)
{
ViewState["Count"] = ((int)ViewState["Count"]) + 1;
AddDropDownList();
}
//取動態增加控制項的值
protected void btntest_Click(object sender, EventArgs e)
{
//讀出PlaceHolder所有是TextBox子控項的text屬性
string strjs = "";
foreach (Control obj in PlaceHolder1.Controls)
{
if (obj is System.Web.UI.WebControls.TextBox)
{
strjs += ((TextBox)obj).Text;
}
}
string js = "alert('" + strjs + "');";
System.Web.UI.ScriptManager.RegisterClientScriptBlock(this, typeof(string), "js", js, true);
}
//方法
private void AddDropDownList()
{
PlaceHolder1.Controls.Clear(); //先清除所有子控制項
for (int i = 0; i < (int)ViewState["Count"]; i++)
{
Label Label = new Label();
Label.ID = "Label" + i.ToString(); //使用流水號取ID
Label.Text = "批號:";
PlaceHolder1.Controls.Add(Label);
DropDownList DropDownList = new DropDownList();
DropDownList.ID = "DropDownList" + i.ToString(); //使用流水號取ID
DropDownList.Items.Insert(0, new ListItem("請選擇", ""));
DropDownList.Items.Insert(1, new ListItem("A", "A"));
DropDownList.Items.Insert(2, new ListItem("B", "B"));
PlaceHolder1.Controls.Add(DropDownList);
Label LabelQ = new Label();
LabelQ.ID = "LabelQ" + i.ToString(); //使用流水號取ID
LabelQ.Text = "數量:";
PlaceHolder1.Controls.Add(LabelQ);
TextBox TextBox = new TextBox();
TextBox.ID = "TextBox" + i.ToString(); //使用流水號取ID
TextBox.Text = "";
TextBox.Width = 140;
PlaceHolder1.Controls.Add(TextBox);
TextBox txtDate = new TextBox();
txtDate.ID = "txtDate" + i.ToString(); //使用流水號取ID
txtDate.Text = "";
txtDate.Width = 80;
txtDate.CssClass = "Wdate";
txtDate.Attributes.Add("OnFocus", "WdatePicker({dateFmt:'yyy/MM/dd', maxDate:'%y-%M-%d'})");
PlaceHolder1.Controls.Add(txtDate);
PlaceHolder1.Controls.Add(newLiteralControl("<br>"));
}
this.ViewState["ADD"] = true;
}
