Question

我正在尝试创建一个查询SQL数据库的应用程序，然后在按钮单击时导出网格视图，以便导入到我们的工资单系统。如果我拿出以下代码行，我得到的唯一错误是Payroll.Form1.Submit_Click(object, System.EventArgs)必须声明一个正文，因为它没有标记为abstract，extern或partial“如果我把主体放回去，那么我会得到22个错误。有人可以指出我正确的方向吗？我的完整代码如下：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Excel = Microsoft.Office.Interop.Excel;
using System.Data.SqlClient;
using Microsoft.Office.Interop.Excel;
using System.IO;

namespace Payroll
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void fillToolStripButton_Click(object sender, EventArgs e)
        {
            try
            {
                this.mIS_FTTIMECARTSQL1TableAdapter.Fill(this.fabTrolMRPDataSet.MIS_FTTIMECARTSQL1, new System.Nullable<System.DateTime>(((System.DateTime)(System.Convert.ChangeType(fromdateToolStripTextBox.Text, typeof(System.DateTime))))), new System.Nullable<System.DateTime>(((System.DateTime)(System.Convert.ChangeType(todateToolStripTextBox.Text, typeof(System.DateTime))))));
            }
            catch (System.Exception ex)
            {
                System.Windows.Forms.MessageBox.Show(ex.Message);
            }
        }

        private void Submit_Click(object sender, EventArgs e);
    }


    DataTableToExcel();
    {
        public void DataTableToExcel()
        {
            Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel.Application();
            try
            {
                // creating new WorkBook within Excel application
                Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing);
                // creating new Excelsheet in workbook
                Microsoft.Office.Interop.Excel._Worksheet worksheet = null;
                // see the excel sheet behind the program
                app.Visible = true;
                // get the reference of first sheet. By default its name is Sheet1.
                // store its reference to worksheet
                worksheet = workbook.Sheets["Sheet1"];
                worksheet = workbook.ActiveSheet;
                // changing the name of active sheet
                worksheet.Name = "Employees";
                // storing header part in Excel
                for (int i = 1; i < mIS_FTTIMECARTSQL1DataGridView.Columns.Count + 1; i++)
                {
                        worksheet.Cells[1, i] = mIS_FTTIMECARTSQL1DataGridView.Columns[i - 1].HeaderText;
                }

                // storing Each row and column value to excel sheet
                for (int i = 0; i <= mIS_FTTIMECARTSQL1DataGridView.Rows.Count - 1; i++)
                {
                    for (int j = 0; j < mIS_FTTIMECARTSQL1DataGridView.Columns.Count; j++)
                    {
                        string values = string.Empty;
                        values = mIS_FTTIMECARTSQL1DataGridView.Rows[i].Cells[j].Value.ToString();
                        worksheet.Cells[i + 2, j + 1] = values;
                    }
                }
            }
            finally
            {
                //Release the resources
                app.Quit();
                System.Runtime.InteropServices.Marshal.ReleaseComObject(app);
                app = null;
            }
        }
    }
}

Answer 1

它是一个方法声明，所以它必须有一个正文

更改private void Submit_Click(object sender, EventArgs e);，因为它的事件处理程序应该受保护（可从设计师访问）

到

 protected void Submit_Click(object sender, EventArgs e)
{
   //call your code to export to excel
}

完整代码

namespace Payroll
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void fillToolStripButton_Click(object sender, EventArgs e)
        {
            try
            {
                this.mIS_FTTIMECARTSQL1TableAdapter.Fill(this.fabTrolMRPDataSet.MIS_FTTIMECARTSQL1, new System.Nullable<System.DateTime>(((System.DateTime)(System.Convert.ChangeType(fromdateToolStripTextBox.Text, typeof(System.DateTime))))), new System.Nullable<System.DateTime>(((System.DateTime)(System.Convert.ChangeType(todateToolStripTextBox.Text, typeof(System.DateTime))))));
            }
            catch (System.Exception ex)
            {
                System.Windows.Forms.MessageBox.Show(ex.Message);
            }

        }

        protected void Submit_Click(object sender, EventArgs e)
        {
            DataTableToExcel();
        }

        public void DataTableToExcel()
        {

            Microsoft.Office.Interop.Excel._Application app = new Microsoft.Office.Interop.Excel.Application();
            try
            {

                // creating new WorkBook within Excel application
                Microsoft.Office.Interop.Excel._Workbook workbook = app.Workbooks.Add(Type.Missing);
                // creating new Excelsheet in workbook
                Microsoft.Office.Interop.Excel._Worksheet worksheet = null;
                // see the excel sheet behind the program
                app.Visible = true;
                // get the reference of first sheet. By default its name is Sheet1.
                // store its reference to worksheet
                worksheet = workbook.Sheets["Sheet1"];
                worksheet = workbook.ActiveSheet;
                // changing the name of active sheet
                worksheet.Name = "Employees";
                // storing header part in Excel
                for (int i = 1; i < mIS_FTTIMECARTSQL1DataGridView.Columns.Count + 1; i++)
                {
                        worksheet.Cells[1, i] = mIS_FTTIMECARTSQL1DataGridView.Columns[i - 1].HeaderText;
                }

                // storing Each row and column value to excel sheet
                for (int i = 0; i <= mIS_FTTIMECARTSQL1DataGridView.Rows.Count - 1; i++)
                {
                    for (int j = 0; j < mIS_FTTIMECARTSQL1DataGridView.Columns.Count; j++)
                    {
                        string values = string.Empty;
                        values = mIS_FTTIMECARTSQL1DataGridView.Rows[i].Cells[j].Value.ToString();
                        worksheet.Cells[i + 2, j + 1] = values;
                    }

                }
            }
            finally
            {
                //Release the resources
                app.Quit();
                System.Runtime.InteropServices.Marshal.ReleaseComObject(app);
                app = null;


            }

      }
}

Answer 2

这是导出dataGrid视图的另一种方法，它更有效。完整代码如下。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using Excel = Microsoft.Office.Interop.Excel;
using System.Data.SqlClient;


namespace Payroll
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void fillToolStripButton_Click(object sender, EventArgs e)
        {
            try
            {
                this.mIS_FTTIMECARTSQL1TableAdapter.Fill(this.fabTrolMRPDataSet.MIS_FTTIMECARTSQL1, new System.Nullable<System.DateTime>(((System.DateTime)(System.Convert.ChangeType(fromdateToolStripTextBox.Text, typeof(System.DateTime))))), new System.Nullable<System.DateTime>(((System.DateTime)(System.Convert.ChangeType(todateToolStripTextBox.Text, typeof(System.DateTime))))));
            }
            catch (System.Exception ex)
            {
                System.Windows.Forms.MessageBox.Show(ex.Message);
            }

        }

        private void Submit_Click(object sender, EventArgs e)


            {

                Excel.Application xlApp;
                Excel.Workbook xlWorkBook;
                Excel.Worksheet xlWorkSheet;
                object misValue = System.Reflection.Missing.Value;


                xlApp = new Excel.Application();
                xlWorkBook = xlApp.Workbooks.Add(misValue);
                xlWorkSheet = (Excel.Worksheet)xlWorkBook.Worksheets.get_Item(1);
                int i = 0;
                int j = 0;

                for (i = 0; i <= mIS_FTTIMECARTSQL1DataGridView.RowCount - 1; i++)
                {
                    for (j = 0; j <= mIS_FTTIMECARTSQL1DataGridView.ColumnCount - 1; j++)
                    {
                        DataGridViewCell cell = mIS_FTTIMECARTSQL1DataGridView[j, i];
                        xlWorkSheet.Cells[i + 1, j + 1] = cell.Value;


                    }

                }

                xlWorkBook.SaveAs("C:\\Time.xls", Excel.XlFileFormat.xlWorkbookNormal, misValue, misValue, misValue, misValue, Excel.XlSaveAsAccessMode.xlExclusive, misValue, misValue, misValue, misValue, misValue);
                xlWorkBook.Close(true, misValue, misValue);
                xlApp.Quit();

                releaseObject(xlWorkSheet);
                releaseObject(xlWorkBook);
                releaseObject(xlApp);

                MessageBox.Show("Excel file created , you can find the file c:\\Time.xls");
            }

        private void releaseObject(object obj)
        {
            try
            {
                System.Runtime.InteropServices.Marshal.ReleaseComObject(obj);
                obj = null;
            }
            catch (Exception ex)
            {
                obj = null;
                MessageBox.Show("Exception Occured while releasing object " + ex.ToString());
            }
            finally
            {
                GC.Collect();
            }
        }

   }
}

我无法将数据网格视图导出到Excel

2 个答案: