【发布时间】：2020-02-01 13:27:37
【问题描述】：
我的动态文本框 TextChanged 事件在不使用 UpdatePanel 的情况下正常工作，但是当我使用 UpdatePanel 时它停止工作。它仅在单击 Button 和单击 LinkButton 时起作用。
如何将动态文本框的 TextChanged 事件设置为 UpdatePanel 的触发器。我希望这对你来说很清楚。
这是我的aspx
<form id="form1" runat="server" enctype="multipart/form-data">
<asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
<asp:UpdatePanel ID="UpdatePanel1" runat="server">
<ContentTemplate>
<asp:Label ID="Label1" runat="server" Text="Name :"></asp:Label>
<asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
<br />
<asp:Label ID="Label2" runat="server" Text="Age :"></asp:Label>
<asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
<br />
<asp:Label ID="Label3" runat="server" Text="Phones :"></asp:Label>
<br />
<asp:Panel ID="pnlTextBox" runat="server">
</asp:Panel>
<asp:LinkButton ID="btnAddTxt" runat="server" OnClick="btnAddTxt_Click">Add TextBox</asp:LinkButton>
<br />
<br />
<asp:Button ID="Button1" runat="server" Text="save" OnClick="Button1_Click" />
</ContentTemplate>
<Triggers>
<asp:PostBackTrigger ControlID="Button1" />
</Triggers>
</asp:UpdatePanel>
</form>
这是后面的代码
protected void Page_PreInit(object sender, EventArgs e)
{
//Recreate Controls
RecreateControls("txtDynamic", "TextBox");
}
protected void btnAddTxt_Click(object sender, EventArgs e)
{
int cnt = FindOccurence("txtDynamic");
CreateTextBox("txtDynamic-" + Convert.ToString(cnt + 1));
}
private int FindOccurence(string substr)
{
string reqstr = Request.Form.ToString();
return ((reqstr.Length - reqstr.Replace(substr, "").Length) / substr.Length);
}
private void RecreateControls(string ctrlPrefix, string ctrlType)
{
string[] ctrls = Request.Form.ToString().Split('&');
int cnt = FindOccurence(ctrlPrefix);
if (cnt > 0)
{
for (int k = 1; k <= cnt; k++)
{
for (int i = 0; i < ctrls.Length; i++)
{
if (ctrls[i].Contains(ctrlPrefix + "-" + k.ToString()) && !ctrls[i].Contains("EVENTTARGET"))
{
string ctrlID = ctrls[i].Split('=')[0];
if (ctrlType == "TextBox")
{
CreateTextBox(ctrlID);
}
break;
}
}
}
}
}
private void CreateTextBox(string ID)
{
TextBox txt = new TextBox();
txt.ID = ID;
txt.AutoPostBack = true;
txt.TextChanged += new EventHandler(OnTextChanged);
pnlTextBox.Controls.Add(txt);
Literal lt = new Literal();
lt.Text = "<br /><br />";
pnlTextBox.Controls.Add(lt);
}
protected void OnTextChanged(object sender, EventArgs e)
{
TextBox txt = (TextBox)sender;
string ID = txt.ID;
//Place the functionality here
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "alertMessage", "alert('" + ID + " fired OnTextChanged event')", true);
}
protected void Button1_Click(object sender, EventArgs e)
{
TextBox txtDynamic1 = (TextBox)this.form1.FindControl("txtDynamic-1");
TextBox txtDynamic2 = (TextBox)this.form1.FindControl("txtDynamic-2");
Response.Write(txtDynamic1.Text + " & " + txtDynamic2.Text);
}
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标签： c# asp.net webforms updatepanel scriptmanager