一、遍曆表單控制項
1.普通頁面遍曆TextBox控制項清空的方法,其他控制項類似foreach(Control c in this.controls){ if(c is TextBox){ TextBox tb=(TextBox)c;tb.Text=String.empty;}}//或foreach (Control col in this.Controls) { if (col.GetType().Name.Equals("TextBox")) { ((TextBox)col).Text = String.empty; } }
二、遍曆Asp.net頁面
//不含母板頁foreach (System.Web.UI.Control txtobj in this.Page.Controls){ if (txtobj.GetType().Name .Equals("TextBox")) { // ((TextBox)txtobj).Text = String.Empty;//這是第一種方法賦值,第二種在下面 TextBox tb = new TextBox(); tb = (TextBox)this.FindControl(txtobj.ID); tb.Text = String.Empty; } }
包含母板頁
//套用主版頁面的頁面遍曆TextBox控制項的方法,其他控制項類似foreach (Control cp in Page.Controls) { foreach (System.Web.UI.Control ct in cp.Controls) { if (ct is HtmlForm) { foreach (Control con in ct.Controls) { foreach (Control c in con.Controls) { if (c is TextBox) { (c as TextBox).Text = String.Empty; } } } } } }
三、清除控制項內容
// 清空指定頁面上所有的控制項內容//public static void ClearAllContent() //清空指定頁面上所有的控制項內容//包括TextBox,CheckBox,CheckBoxList,RadioButton,RadioButtonList。不過不清 //除如ListBox,DropDownList,因為這樣的控制項值對當前頁面來說還能用,一般這些控制項裡都是儲存的字典資料。 //<param name="page"> 指定的頁面</param> public static void ClearAllContent(System.Web.UI.Control page) { int nPageControls = page.Controls.Count; for (int i = 0; i < nPageControls; i++) { foreach (System.Web.UI.Control control in page.Controls[i].Controls) { if (control.HasControls()) { ClearAllText(control); } else { if (control is TextBox) (control as TextBox).Text = ""; if (control is CheckBox) (control as CheckBox).Checked = false; if (control is RadioButtonList) (control as RadioButtonList).SelectedIndex = -1; if (control is RadioButton) (control as RadioButton).Checked = false; if (control is CheckBoxList) { foreach (ListItem item in (control as CheckBoxList).Items) { item.Selected = false; } } }//if..else }//foreach }//for }