c# - 使用 Page.ClientScript.RegisterClientScriptBlock 不起作用

Question

我正在尝试触发如下所示的弹出窗口，但它不起作用。请帮忙

public void btnSubmit_Click(Object o, EventArgs e)
{
    if (checkFileExists(Convert.ToString(fileInfo)))
    {
        Page.ClientScript.RegisterClientScriptBlock(this.GetType(), "Msg", "<script type=\"text/javascript\"  language=\"javascript\">function showMsg(){return confirm(\"This image name already exists, do you want to replace it?\");}</script>", true);
        btnSubmit.OnClientClick = "return showMsg()";
    }
    if (something else)
    {
        // It does whatever is here but never pops the question above
    }
}

在我的按钮上

 <asp:Button class="Button" ID="btnSubmit" CausesValidation="True" Text="SUBMIT" runat="server"
             OnClick="btnSubmit_Click"></asp:Button>

Answer 1

Page.ClientScript.RegisterClientScriptBlock 不工作的另一个原因是页面没有服务器端表单，例如<form id="form1" runat="server">... </form>