Question

我在aspx上有一个asp按钮：

<asp:Button id="btnReport2" name="btnReport2"  runat="server"  class="gradientBlueBtn" Text="Show Report" OnClientClick="Alert();" ToolTip="Report"/>

正如您所看到的，我正在调用一个使用AJAX调用C＃方法的javascript函数。我是这样做的：

<script>
    function Alert()
            {
                $.ajax({
                    type: "POST",
                    url: "Selection.aspx/GetReport",
                    contentType: 'application/json; charset=utf-8',
                    dataType: 'json',
                    success: function()
                    {
                        alert('success');
                    },
                    error: function()
                    {
                        alert('error');
                    }
                });

            }
</script>

问题是，当我点击按钮时，我总是收到错误消息。有什么我做错了吗？

编辑：C＃方法。我已经设置了一个断点来查看该方法是否被调用但显然不是。

public void GetReport()
{
    AddFilters();
    decimal localCurrencyRate;            
    App_Data.BulkImportDSTableAdapters.ClientsTableAdapter tadptClients = new  App_Data.BulkImportDSTableAdapters.ClientsTableAdapter();
    string legalEntityID = string.Empty;           
    if (txtSrcSys.Text != null)
    {
        DataTable dtSSYS = tadptClients.GetLegalEntityID(txtSrcSys.Text);
        if (dtSSYS.Rows.Count > 0)
        {
            legalEntityID = Convert.ToString(dtSSYS.Rows[0][0]);
        }
    }
    DateTime dtInvoiceFrom = DateTime.ParseExact(txtInvoiceFrom.Text, "dd/MM/yyyy", CultureInfo.InvariantCulture);
    DateTime dtInvoiceTo = DateTime.ParseExact(txtInvoiceTo.Text, "dd/MM/yyyy", CultureInfo.InvariantCulture);
    string strInvoiceFrom = String.Format("{0:yyyyMMdd}", dtInvoiceFrom);
    string strInvoiceTo = String.Format("{0:yyyyMMdd}", dtInvoiceTo);
    string localCurrency = dbcon.getLocalCurrency(legalEntityID);
    DataSet localCurrencyDs = dbcon.getCurrencyRate(localCurrency, strInvoiceFrom);
    if (Convert.ToDecimal(localCurrencyDs.Tables[0].Rows[0]["rate"]) == 0)
        localCurrencyRate = Convert.ToDecimal(localCurrencyDs.Tables[0].Rows[1]["rate"]);
    else
        localCurrencyRate = Convert.ToDecimal(localCurrencyDs.Tables[0].Rows[0]["rate"]);
    string fileQuery = string.Empty;
    if (cbxExpYes.Checked == true && cbxExpNo.Checked == false)
    {                
        fileQuery = File.ReadAllText(Server.MapPath("~/temp/Query.txt")).Replace("{1}", "XFORM_AREA.IMPORT_GE_MAIN_V15BIS m");
        fileQuery = fileQuery.Replace(":param1", localCurrencyRate.ToString());
        fileQuery = fileQuery.Replace("{0}", qb.getFilters().Replace("P.", "m."));
    }
    if (cbxExpYes.Checked == false && cbxExpNo.Checked == true)
    {               
        fileQuery = File.ReadAllText(Server.MapPath("~/temp/Query.txt")).Replace("{1}", "PREIMPORT_GE_MAIN m");
        fileQuery = fileQuery.Replace(":param1", localCurrencyRate.ToString());
        fileQuery = fileQuery.Replace("{0}", qb.getFilters().Replace("P.", "m."));
    }
    if (cbxExpYes.Checked == true && cbxExpNo.Checked == true)
    {               
        fileQuery = File.ReadAllText(Server.MapPath("~/temp/QueryUnion.txt"));
        fileQuery = fileQuery.Replace("{ParamValues}", "pg.DEFVAL ");
        fileQuery = fileQuery.Replace("{ParamTab}", "ref_var_def pg");
        fileQuery = fileQuery.Replace("{ParamCond}", "pg.NM = 'WL_REPORTING_CUR'");
        fileQuery = fileQuery.Replace("{0}", qb.getFilters().Replace("P.", "m."));
        fileQuery = fileQuery.Replace("{1}", qb.getFilters().Replace("P.", "i."));
    }
    ASPxPivotGrid1.OptionsFilter.ShowOnlyAvailableItems = true;
    int indexTravFullName = 0;
    int indexEndTravFullName = 0;
    string paramToRemove = string.Empty;

    indexTravFullName = fileQuery.IndexOf("AND PR.ST_TRAVELLER_FULL_NAME LIKE");
    if (indexTravFullName > 0)
    {
        indexEndTravFullName = fileQuery.Substring(indexTravFullName).IndexOf("AND", 3);
        paramToRemove = fileQuery.Substring(indexTravFullName, indexEndTravFullName);
        fileQuery = fileQuery.Replace(paramToRemove, string.Empty);
    }

    if (!string.IsNullOrEmpty(fileQuery))
    {


        DataSet dsTravels = new DataSet();

        oCmd.CommandText = fileQuery;
        oCmd.CommandType = CommandType.Text;
        oCmd.Connection = oConn;
        odpter.SelectCommand = oCmd;


        odpter.SelectCommand.Parameters.Add(":pSourceSystem", txtSrcSys.Text);
        odpter.SelectCommand.Parameters.Add(":pInvoiceFrom", strInvoiceFrom);
        odpter.SelectCommand.Parameters.Add(":pInvoiceTo", strInvoiceTo);

        if (!String.IsNullOrWhiteSpace(txtCustomNr.Text))
        {
            odpter.SelectCommand.Parameters.Add(":pCustomerNr", txtCustomNr.Text);
        }
        if (!String.IsNullOrWhiteSpace(txtIATA.Text))
        {
            odpter.SelectCommand.Parameters.Add(":Iata", txtIATA.Text);
        }
        if (!String.IsNullOrWhiteSpace(txtCurrCode.Text))
        {
            odpter.SelectCommand.Parameters.Add(":CurrCode", txtCurrCode.Text);
        }
        if (!String.IsNullOrWhiteSpace(txtInvoiceNrFrom.Text))
        {
            odpter.SelectCommand.Parameters.Add(":pInvoiceNrFrom", txtInvoiceNrFrom.Text);
        }
        if (!String.IsNullOrWhiteSpace(txtInvoiceNrTo.Text))
        {
            odpter.SelectCommand.Parameters.Add(":pInvoiceNrTo", txtInvoiceNrTo.Text);
        }
        if (!String.IsNullOrWhiteSpace(txtDossierNrFrom.Text))
        {
            odpter.SelectCommand.Parameters.Add(":pDossierNrFrom", txtInvoiceNrFrom.Text);
        }
        if (!String.IsNullOrWhiteSpace(txtDossierNrFrom.Text))
        {
            odpter.SelectCommand.Parameters.Add(":pDossierNrTo", txtInvoiceNrFrom.Text);
        }
        if (!String.IsNullOrWhiteSpace(txtTravellerName.Text))
        {
            odpter.SelectCommand.Parameters.Add(":pTravellerName", txtTravellerName.Text);
        }
        if (chbxSale.Checked)
        {
            odpter.SelectCommand.Parameters.Add(":pSale", "SA");
        }
        if (chbxRefund.Checked)
        {
            odpter.SelectCommand.Parameters.Add(":pRefund", "RE");
        }
        if (hfTravelWith.Value.Contains("chbxairs"))
        {
            odpter.SelectCommand.Parameters.Add(":pProductAir", "7");
        }
        if (hfTravelWith.Value.Contains("chbxhotels"))
        {
            odpter.SelectCommand.Parameters.Add(":pProductHotel", "3");
        }
        if (hfTravelWith.Value.Contains("chbxcars"))
        {
            odpter.SelectCommand.Parameters.Add(":pProductCar", "1");
        }
        if (hfTravelWith.Value.Contains("chbxrails"))
        {
            odpter.SelectCommand.Parameters.Add(":pProductRail", "6");
        }
        if (hfTravelWith.Value.Contains("chbxmisc"))
        {
            odpter.SelectCommand.Parameters.Add(":pProductMisc", "9");
        }

        if (!String.IsNullOrWhiteSpace(txtBatchNr.Text))
        {
            odpter.SelectCommand.Parameters.Add(":pBatchNr", txtBatchNr.Text);
        }


        odpter.MissingSchemaAction = MissingSchemaAction.AddWithKey;
        odpter.Fill(dsTravels, "ReportTab");
        int count = dsTravels.Tables[0].Rows.Count;
        DataTable dt = dsTravels.Tables[0];


        if (dt.Rows.Count > 0)
        {

            ASPxPivotGrid1.DataSource = dt;
            ASPxPivotGrid1.DataBind();
            Session["dtReport"] = dt;
            //ASPxPivotGrid1.Prefilter.CriteriaString = "[" + ""  + "]";
        }
    }
}

Answer 1

您的方法必须静态，并使用 [WebMethod] 进行修饰，如下所示， why should make it static and decorate with [WebMethod]?

[WebMethod]
public static void GetReport()
{
    // Your code here
}

$.ajax({
    type: "POST",
    url: "Selection.aspx/GetReport",
    data: JSON.stringify({ parametername : "Parameter Value" }),
    contentType: 'application/json; charset=utf-8',
    dataType: 'json',
    success: function()
    {
        alert('success');
    },
    error: function()
    {
       alert('error');
    }
});

Answer 2

您的方法必须声明为static并用[WebMethod]修饰。所以，你的方法应该是：

[WebMethod]
public static void GetReport()
{
    // Your code here
}

有关详细信息，请查看this post。

修改!!!

我看到您在代码中使用了一些控件（例如txtInvoiceFrom，txtInvoiceTo）。制作方法static后，您无法再访问这些控件。要解决此问题，请按以下步骤操作（以txtInvoiceTo为例）：

不要使用txtInvoiceTo.Text或类似内容获取数据。将其作为参数传递。

使用txtInvoiceTo或其他内容（您的选择）从客户端获取jQuery数据，并将其传递给Ajax以发布到服务器。

要按txtInvoiceTo获取jQuery数据，您可以：$('#<%= txtInvoiceTo.ClientID %>').val()

Answer 3

尝试使用这种格式。

 [System.Web.Services.WebMethod]
 public static void GetReport()
 {
 }


 [System.Web.Services.WebMethod]
 public static void GetReport(string name)
 {
 }

从

获取更多详细信息

http://www.aspsnippets.com/Articles/Call-ASPNet-Page-Method-using-jQuery-AJAX-Example.aspx

Answer 4

有3点必须检查：

ajax 调用中的 async true。示例：

$.ajax({
                       type: "POST",
                       url: "<%=System.Configuration.ConfigurationManager.AppSettings["URL"]%>ClassEadArquivos.aspx/deleteArquivo",
                       date: "{FileCode: '" +FileCode + "',CodigoAulaEad: '" + <%=CodigoAulaEad.Value%> + "'}",
                       async: true,
                       contentType: "application/json",
                       success: function (response) {

代码隐藏中的静态和异步方法。示例：

[WebMethod()]
public static async System.Threading.Tasks.Task<string> deleteFile(string fileCode, stringCode ClassEad)
     {

如果代码隐藏初始方法调用其他异步方法必须全部为标记为异步和静态。

ASP.NET Webforms - 使用AJAX调用C＃方法

4 个答案: