ASP.NET遍曆控制項的幾種方法

方法一:javascript法

function btnClear()
{
for(i=0;i<document.forms[0].elements.length;i++)
{
e=document.forms[0].elements[i];
if(e.type=='text'||e.type=='textarea')
{
e.value="";
}
}
return false;
}

在Onclick OnFocus OnLoad等事件中引用就行

方法二:Foreach遍曆

foreach(Control ctl in this.Page.Controls[1].Controls)
{

if(ctl.GetType() == typeof(TextBox))
{
TextBox t = (TextBox) ctl;
t.Text = string.Empty;

}

方法三:
#region 清空指定頁面上所有的控制項內容，public static void ClearAllContent()
/// <summary>
/// 清空指定頁面上所有的控制項內容，包括TextBox，CheckBox,CheckBoxList,RadioButton,RadioButtonList。但是不清
/// 除如ListBox，DropDownList，因為這樣的控制項值對當前頁面來說還可以用，一般這些控制項裡都是儲存的字典資料。
/// Author：Kevin
/// 日期：2004-12-02
/// </summary>
/// <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
}
#endregion

方法四:

建立一個類，用於存放那些TextBox的name和value ，代碼如下：
Public Class UtilityObj
Private _name As String
Private _value As String
Public Sub New(ByVal Name As String, ByVal Value As String)
_name = Name
_value = Value
End Sub
Public Property Name() As String
Get
Return _name
End Get
Set(ByVal Value As String)
_name = Name
End Set
End Property
Public Property Value() As String
Get
Return (_value)
End Get
Set(ByVal Value As String)
_value = Value
End Set
End Property
End Class
這個類包含兩個屬性："name" 和 "value"，再定義一個公有的Arraylist(oArraylist),用於儲存資料。

要實現遍曆ASP.NET頁面所有的控制項，我們還需要定義一個主要的方法。這個方法接收一個Control類型的參數，如果這個參數為textbox，則儲存它的 name 和 value。
代碼如下：
Public Sub LoopingControls(ByVal oControl As Control)
Dim frmCtrl As Control
oArrayList = New ArrayList
For Each frmCtrl In oControl.Controls
If TypeOf frmCtrl Is TextBox Then
oArrayList.Add(New UtilityObj(frmCtrl.ID, DirectCast(frmCtrl, TextBox).Text))
End If
If frmCtrl.HasControls Then
LoopingControls(frmCtrl)
End If
Next
End Sub
使用上面方法來實現遍曆頁面所有的控制項
LoopingControls(Page)
DataGrid1.DataSource = oArrayList
DataGrid1.DataBind()

/// <summary>
/// 遍曆頁面的label並賦值, /// </summary>
protected void RenameLabel()
{
foreach (Control ctr in this.pnlMaterial.Controls)
{

if (ctr.GetType().ToString() == "System.Web.UI.WebControls.Label")
{
//Response.Write("id:" + ctr.ID+ " text:" + ((Label)ctr).Text + "<br>");

if (ctr.ID.ToString().Length == 6)
{
int LabelId1 = Convert.ToInt32(ctr.ID.Substring(5, 1).ToString().Trim());

((Label)ctr).Text = BLL.EDI.EDIType.GetTypeName(LabelId1);
}

if (ctr.ID.ToString().Length == 7)
{
int LabelId2 = Convert.ToInt32(ctr.ID.Substring(5, 2).ToString().Trim());

((Label)ctr).Text = BLL.EDI.EDIType.GetTypeName(LabelId2);

}

}

}

}

/// <summary>
/// 遍曆dropdownlist賦值
/// </summary>
protected void SetDropDownListValue()
{
foreach (Control ctr in this.pnlMaterial.Controls)
{

if (ctr.GetType().ToString() == "System.Web.UI.WebControls.DropDownList")
{
//Response.Write("id:" + ctr.ID + " text:" + ((DropDownList)ctr).DataTextField.ToString() + "<br>");

if (ctr.ID.ToString().Length == 13)
{
int LabelId1 = Convert.ToInt32(ctr.ID.Substring(12, 1).ToString().Trim());

((DropDownList)ctr).DataSource = BLL.EDI.EDIMaterial.List(LabelId1);

((DropDownList)ctr).DataValueField = "mName";

((DropDownList)ctr).DataTextField = "mCode";

((DropDownList)ctr).DataBind();
}

if (ctr.ID.ToString().Length == 14)
{
int LabelId2 = Convert.ToInt32(ctr.ID.Substring(12, 2).ToString().Trim());

((DropDownList)ctr).DataSource = BLL.EDI.EDIMaterial.List(LabelId2);

((DropDownList)ctr).DataValueField = "mName";

((DropDownList)ctr).DataTextField = "mCode";

((DropDownList)ctr).DataBind();
}

}

}

}