無商不雅

方式1:

1、先建立方法:

private void ClearControls(params Control[] controls)
    {
        foreach (Control control in controls)
        {
            if (control is TextBox)
            {
                (control as TextBox).Text = "";
            }
            else if (control is Label)
            {
                (control as Label).Text = "";
            }
            else if (control is HiddenField)
            {
                (control as HiddenField).Value = "";
            }
        }
    }

2、在button事件中:

protected void Button1_Click(object sender, EventArgs e)
    {
ClearControls(TextBox1, TextBox2, Label1);
}

---

用Panel或UpdatePanel包起來這些textbox:

  PS: 若你有用ASP.net的AJAX的話，就會自動產生UpdatePanel，

不用另外再建一個Panel。

方式2: (用Panel或UpdatePanel包住)

protected void Button1_Click(object sender, EventArgs e)
    {

foreach (Control c in this.FindControl("UpdatePanel1").Controls)
        {
            if (c is TextBox)
            {
                ((TextBox)c).Text = "";
            }
        }
    }

方式3: (用Panel或UpdatePanel包住)

1、

先建立方法:

private void cleartb()
    {

        foreach (Control item in UpdatePanel1.Controls)
        {
            if (item is System.Web.UI.WebControls.TextBox)
            {
                ((TextBox)item).Text = string.Empty;
            }
        }
    }

2、在button事件中:

protected void Button1_Click(object sender, EventArgs e)
    {
        cleartb();
    }

方式4: (用Panel或UpdatePanel包住)

    在button事件中:
 

protected void Button1_Click(object sender, EventArgs e)
    {
       foreach (Control c in this.FindControl("UpdatePanel1").Controls)
        {
            if (c is TextBox)
            {
                ((TextBox)c).Text = "";
            }
        }
    }

方式5: (用Panel或UpdatePanel包住)
(此法採用LINQ語法，只針對被AJAX包住時有用)

在button事件中:
protected void Button1_Click(object sender, EventArgs e)
    {
    foreach (TextBox TB in UpdatePanel1.Controls[0].Controls.OfType())
        {
            if(TB.Text != null)
                TB.Text = "";
        }
    }

方式6: (用UpdatePanel包住) (此方法我測失敗，尚在研究中…)

           在button事件中:

protected void Button1_Click(object sender, EventArgs e)
    {
 ((TextBox)this.UpdatePanel1.ContentTemplateContainer.FindControl("txtBSTimeLimitName")).Text = "";

    }

方式7:用javascript

<asp:Button ID="Button1" runat="server" Text="Button" OnClientClick="reset()" />

 

註: 若你有用ASP.net的AJAX的話，請採用被UpdatePanel包起來這些textbox的方式

   才有效。