无效的回发或回调参数。如何解决这个异常？

Question

我在上传文件时遇到此异常。

回发或回调参数无效。使用配置或页面中的 启用事件验证。出于安全目的，此功能验证回发或回调事件的参数是否源自最初呈现它们的服务器控件。如果数据有效且符合预期，请使用 ClientScriptManager.RegisterForEventValidation 方法注册回发或回调数据以进行验证

背后的代码：

public partial class LBMIS1New : System.Web.UI.Page
{
    protected void Upload(object sender, EventArgs e)
    {
        //Upload and save the file
        string excelPath = Server.MapPath("~/Doc/") + Path.GetFileName(FileUpload1.PostedFile.FileName);
        FileUpload1.SaveAs(excelPath);

        string conString = string.Empty;
        string extension = Path.GetExtension(FileUpload1.PostedFile.FileName);
        switch (extension)
        {
            case ".xls": //Excel 97-03
                conString = ConfigurationManager.ConnectionStrings["Excel03ConString"].ConnectionString;
                break;
            case ".xlsx": //Excel 07 or higher
                conString = ConfigurationManager.ConnectionStrings["Excel07+ConString"].ConnectionString;
                break;
        }
        conString = string.Format(conString, excelPath);
        using (OleDbConnection excel_con = new OleDbConnection(conString))
        {
            excel_con.Open();
            string sheet1 = excel_con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null).Rows[0]["TABLE_NAME"].ToString();
            DataTable dtExcelData = new DataTable();

            //[OPTIONAL]: It is recommended as otherwise the data will be considered as String by default.
            dtExcelData.Columns.AddRange(new DataColumn[7] {
                new DataColumn("Id", typeof(int)),
                new DataColumn("Banks", typeof(string)),
                new DataColumn("Crop Loan", typeof(int)),
                new DataColumn("Water Resources", typeof(decimal)),
                new DataColumn("Farm Mechanisation", typeof(int)),
                new DataColumn("Plantation & Horticulture",
                typeof(decimal)),
                new DataColumn("Forestry & Wasteland Dev.", typeof(int))
            });

            using (OleDbDataAdapter oda = new OleDbDataAdapter("SELECT * FROM [" + sheet1 + "A2:F]", excel_con))
            {
                oda.Fill(dtExcelData);
            }
            excel_con.Close();

            string consString = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
            using (SqlConnection con = new SqlConnection(consString))
            {
                using (SqlBulkCopy sqlBulkCopy = new SqlBulkCopy(con))
                {
                    //Set the database table name
                    sqlBulkCopy.DestinationTableName = "dbo.TestLDM";

                    //[OPTIONAL]: Map the Excel columns with that of the database table
                    sqlBulkCopy.ColumnMappings.Add("Id", "LDM_LBSMI1ID");
                    sqlBulkCopy.ColumnMappings.Add("Banks", "BankName");
                    sqlBulkCopy.ColumnMappings.Add("Crop Loan", "PCropLoanNo");
                    sqlBulkCopy.ColumnMappings.Add("Water Resources", "PCropLoanAmt");
                    sqlBulkCopy.ColumnMappings.Add("Farm Mechanisation", "PTermLoanWaterRNo");
                    sqlBulkCopy.ColumnMappings.Add("Plantation & Horticulture", "PTermLoanWaterRAmt");
                    sqlBulkCopy.ColumnMappings.Add("Forestry & Wasteland Dev.", "PTermLoanFarmMechanisationNo");
                    con.Open();
                    sqlBulkCopy.WriteToServer(dtExcelData);
                    con.Close();
                }
            }
        }
    }

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            BindGridview();
        }
    }

    protected void BindGridview()
    {
        string conString = ConfigurationManager.ConnectionStrings["conn"].ConnectionString;
        DataSet ds = new DataSet();
        using (SqlConnection con = new SqlConnection(conString))
        {
            con.Open();
            SqlCommand cmd = new SqlCommand("select * from dbo.TestLDM", con);
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            da.Fill(ds);
            con.Close();
            gvDetails.DataSource = ds;
            gvDetails.DataBind();
        }
    }

    protected void gvDetails_PageIndexChanging(object sender, GridViewPageEventArgs e)
    {
        gvDetails.PageIndex = e.NewPageIndex;
        BindGridview();
    }
}

Answer 1

在您的 aspx 表单上，在您的 html 代码上方关闭 EventValidation 即可解决。

EnableEventValidation="false"