如何从asp.net中scriptmanager.registerclientscript中编写的javascript确

How to return value from javascript confirm box written in scriptmanager.registerclientscript in asp.net.?

本文关键字：javascript registerclientscript scriptmanager asp net 更新时间：2023-09-26

如何从asp.net中scriptmanager.registerlinkscript中编写的javascript确认框返回值。？

事实上，我想在gridview的文本框的文本更改事件上给出确认框。如果用户单击"是"，则我希望更新更改后的值；如果用户单击否，则它应该恢复到旧值。

我的伪代码是这样的：

Protected Sub GridViewCreateInvoice_QuantityTextChanged(ByVal sender As Object, ByVal e As EventArgs)
        Dim gr As GridViewRow
        Dim i As Boolean
        Dim txtqty, txtupdatedQty As TextBox
        Dim txtoqty, qty As String
        Dim result As MsgBoxResult
        'Dim dtPOFulfillmentInfo As DataTable
        Try
            txtqty = DirectCast(sender, TextBox)
            gr = txtqty.NamingContainer

            '' txtoqty = GridViewCreateInvoice.Rows(gr.DataItem("originalqty")).ToString()
            txtoqty = DataBinder.Eval(gr.DataItem, "originalqty").ToString()
            qty = DataBinder.Eval(gr.DataItem, "qty").ToString()

            If Not ((txtqty.Text = String.Empty And Not txtqty.Text.Trim = "" And Not txtqty.Text.Contains("&nbsp;")) And (txtoqty = String.Empty)) Then
                If txtqty.Text > txtoqty Then
                     ScriptManager.RegisterClientScriptBlock(Page, Me.GetType(), "Confirm Quantity Changed", return confirm("Are you sure you want to continue"), True)
                    If i = True Then
                        DataBinder.Eval(gr.DataItem, "qty") = txtqty.Text
                    Else
                        txtqty.Text = DataBinder.Eval(gr.DataItem, "qty").ToString()
                    End If
                Else
                     ScriptManager.RegisterClientScriptBlock(Page, Me.GetType(), "Confirm Quantity Changed", return confirm("Are you sure you want to continue"), True)
                    If i = True Then
                        DataBinder.Eval(gr.DataItem, "qty") = txtqty.Text
                    Else
                        txtqty.Text = DataBinder.Eval(gr.DataItem, "qty").ToString()
                    End If
                End If
            End If
        Catch ex As Exception
            Common.WriteLog(ex.Message)
            Common.WriteLog((ex.StackTrace))
            Response.Redirect("~/Error.aspx", False)
        End Try
    End Sub

我建议不要在TextBox'TextChanged事件上发布（AutoPostback=true）。

相反，我建议在客户端进行所有操作。一种方法是处理onchange事件以显示javascript confirm，并在用户单击cancel:时立即恢复旧值

function confirmUpdate(sender,message){
    var update = confirm(message);
    if(update){
        return true;
    }else{
        sender.value = sender.defaultValue;
        return false;
    }
}

文本默认值属性

您可以在GridView:的RowDataBound服务器端注册此功能

protected void gridview1_RowDataBound(object sender, GridViewRowEventArgs e)
{
    if (e.Row.RowType == DataControlRowType.DataRow)
    {
        TextBox txtqty = (TextBox)e.Row.FindControl("txtqty");
        txtqty.Attributes.Add("onchange", "return confirmUpdate(this, 'Are you sure you want to continue')");
    }
}

I dont know what else logic you had implemented..
its a simple solution may be it helps u..
put a label for e.g lblScript in your page
then simply set its text from server side i.e
lblScript.Text = 
"<script> var x=window.confirm('Are you sure you are ok?')
if (x)
window.alert('Good!') //
else
window.alert('Too bad')
</script>";