c# - ASP.NET 中的 Javascript 警报

Question

我想使用 Javascript Alert在我的 ASP.NET 页面中运行。

比如像这样；

Response.Write("<script language=javascript>alert('ERROR');</script>);

但是，这是行不通的。

我在这里问我做错了什么，每个人都建议我使用 RegisterScriptBlock

ScriptManager.RegisterClientScriptBlock(this, this.GetType(), " ", "alert('ERROR')",true);

但我不想使用它，因为它与 PostBack

一起工作

如果没有 PostBack，我怎么能做到这一点？

编辑:例如使用；

try
{
    string strConnectionString = ConfigurationManager.ConnectionStrings["SqlServerCstr"].ConnectionString;

    SqlConnection myConnection = new SqlConnection(strConnectionString);
    myConnection.Open();

    string hesap = Label1.Text;
    string musteriadi = DropDownList1.SelectedItem.Value;
    string avukat = DropDownList2.SelectedItem.Value;

    SqlCommand cmd = new SqlCommand("INSERT INTO AVUKAT VALUES (@MUSTERI, @AVUKAT, @HESAP)", myConnection);

    cmd.Parameters.AddWithValue("@HESAP", hesap);
    cmd.Parameters.AddWithValue("@MUSTERI", musteriadi);
    cmd.Parameters.AddWithValue("@AVUKAT", avukat);
    cmd.Connection = myConnection;

    SqlDataReader dr = cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection);
    Response.Redirect(Request.Url.ToString());
    myConnection.Close();
}
catch (Exception)
{
    Response.Write("<h2>ERROR</h2>");
}

Answer 1

参见 a note from MSDN :

If you want to register a script block that does not pertain to partial-page updates, and if you want to register the script block only one time during initial page rendering, use the RegisterClientScriptBlock method of the ClientScriptManager class. You can get a reference to the ClientScriptManager object from the ClientScript property of the page.

所以，我认为ClientScriptManager.RegisterStartupScript方法是你需要的:

ClientScriptManager cs = Page.ClientScript;
cs.RegisterClientScriptBlock(
    this.GetType(), 
    " ", 
    @"<script language=javascript>alert('ERROR');</script>", 
    true
);