Question

有人可以帮我解决GridView EventHandler问题吗？我有这个GridView，每行都有一个按钮，使用ID作为过滤器将数据提取到excel。

我的问题是如何使用EventHandler方法中仅存在的两个参数来完成它？

protected void gvJobs_RowCommand(Object sender, GridViewCommandEventArgs e)
{
    if (e.CommandName == "btnExtract_Click")
    {                                                                
         int index = Convert.ToInt32(e.CommandArgument);
         GridViewRow row = gvJobs.Rows[index];

         //EventHandler call
         ExtractJobsCalibrationForm(sender, e);
    }                                                                
}

它会触发事件，但我想知道点击的特定行按钮的数据是如何将所选行的ID传递给EventHandler。

以下是EventHandler的代码：

void View_ExtractJobsCalibrationForm(object sender, EventArgs e) 
{
    try
    {
        using (Data.DataContexts.IDataContext objContext = Data.DataContexts.DataContext.CreateDataContext()) 
        {
            IQueryable<Data.JobSummary> objJobs = objContext.Jobs.GetJobSummaries().Where(j => !j.IsDeleted);

            string path = HttpContext.Current.Server.MapPath("/Reports/ExcelTemplate/Calibration_Form_ARS-FORM-CL1_Template.xlsx");
            string destPath = @"C:\Users\ringgo_dejesus\Desktop\Calibration_Form_ARS-FORM-CL1_Template.xlsx";


            oXL = new Microsoft.Office.Interop.Excel.Application();
            oXL.Visible = true;
            oXL.DisplayAlerts = false;

            //Create a copy from the Template to save the data.
            System.IO.File.Copy(path, destPath, true);

            //Open the copied template.
            mWorkBook = oXL.Workbooks.Open(destPath, 0, false, 5, "", "", false, Microsoft.Office.Interop.Excel.XlPlatform.xlWindows, "", true, false, 0, true, false, false);

            //Get all the sheets in the workbook
            mWorkSheets = mWorkBook.Worksheets;
            //Get the allready exists sheet
            mWSheet = (Microsoft.Office.Interop.Excel.Worksheet)mWorkSheets.get_Item("Pre calibration Check in");

            //Microsoft.Office.Interop.Excel.Range range = mWSheet.UsedRange;
            //int colCount = range.Columns.Count;
            //int rowCount = range.Rows.Count;

            //for (int index = 1; index < 15; index++)
            //{
            //    mWSheet.Cells[rowCount + index, 1] = rowCount + index;
            //    mWSheet.Cells[rowCount + index, 2] = "New Item" + index;
            //}

            Excel.Range JobNo = (Excel.Range)mWSheet.Rows.Cells[2, 2];
            Excel.Range Date = (Excel.Range)mWSheet.Rows.Cells[3, 2];
            Excel.Range CheckedInBy = (Excel.Range)mWSheet.Rows.Cells[4, 2];
            Excel.Range ClientName = (Excel.Range)mWSheet.Rows.Cells[7, 2];
            Excel.Range ClientNum = (Excel.Range)mWSheet.Rows.Cells[8, 2];
            Excel.Range PONumber = (Excel.Range)mWSheet.Rows.Cells[9, 2];
            Excel.Range MonitorManufacturer = (Excel.Range)mWSheet.Rows.Cells[22, 4];
            Excel.Range MonitorModel = (Excel.Range)mWSheet.Rows.Cells[23, 4];
            Excel.Range MonitorSerialNum = (Excel.Range)mWSheet.Rows.Cells[24, 4];
            Excel.Range ProbeManufacturer = (Excel.Range)mWSheet.Rows.Cells[26, 4];
            Excel.Range ProbeModel = (Excel.Range)mWSheet.Rows.Cells[27, 4];
            Excel.Range ProbeSerialNum = (Excel.Range)mWSheet.Rows.Cells[28, 4];
            Excel.Range LastCalibrated = (Excel.Range)mWSheet.Rows.Cells[37, 4];

            var data = objJobs.Where(j => j.JobReference.Contains(View.JobReferenceNo.Trim()))
                              .Select(x => new
                              {
                                  JobNum = x.JobReference,
                                  CreationDate = x.DateCreated,
                                  CreatedBy = x.CreatedByUserId,
                                  ClientName = x.ClientName,
                                  ClientNumber = x.ClientId,
                                  PONumber = x.PurchaseOrderNumber
                              }).FirstOrDefault();

            JobNo.Value = data.JobNum;
            Date.Value = data.CreationDate;
            CheckedInBy.Value = data.CreatedBy;
            ClientName.Value = data.ClientName;
            ClientNum.Value = data.ClientNumber;
            PONumber.Value = data.PONumber;

            mWorkBook.Save();
            //mWorkBook.SaveAs(path, Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);

            //mWorkBook.Close(Missing.Value, Missing.Value, Missing.Value);
            mWSheet = null;
            mWorkBook = null;
            //oXL.Quit();
            GC.WaitForPendingFinalizers();
            GC.Collect();
            GC.WaitForPendingFinalizers();
            GC.Collect();
        }
    }
    catch (Exception objException)
    {
        View.DisplayException(objException);
    }
}

我想使用选定的行号或ID来过滤objJobs的LINQ。

Answer 1

我想你想获得所选行的记录ID。

下面的代码将为您提供selectedRow的记录ID，如果它出现在gridview的设计页面设计中。

为此，请使用以下逻辑：

protected void gvJobs_RowCommand(Object sender, GridViewCommandEventArgs e)
    {
        if (e.CommandName == "btnExtract_Click")
        {    
             int yourSelectedID = (((Button)e.CommandSource).NamingContainer as GridViewRow).RowIndex;     
             //
                  //do stuff with yourSelectedID
             //EventHandler call
             ExtractJobsCalibrationForm(yourSelectedID);
             //  


        }                                                                
    }

Answer 2

您可以将所需的ID放入gvJobs DataKeyNames属性中，然后根据需要检索每行的ID。

.aspx示例

<asp:GridView ID="gvJobs" runat="server" DataKeyNames="YourIdNameGoesHere" />

.aspx.cs示例（在按钮OnClick事件中）

Button button = sender as Button;
GridViewRow gridViewRow = button.NamingContainer as GridViewRow;
int id = Convert.ToInt32(gvJobs.DataKeys[gridViewRow.RowIndex].Value);

使用EventArgs e传递选定的行数据

2 个答案: