我想在加载Excel文件时将所有格式（边界等）从Excel文件中删除，然后再将数据填充到数据表中。
运行代码时，updateExcel_Click部分用每行ConsigneeCombo框中的列更新C列，但是，如果我正在处理的文件具有格式设置，例如10行带有边框，但其中只有8行带有文本，由于格式，它会更新所有10行
编辑
除了删除边框，updateExcel_Click部分中仅将其添加到包含文本的行中怎么办？
private void updateExcel_Click(object sender, EventArgs e)
{
for (int i = 0; i < dataGridView1.RowCount - 1; i++)
{
dataGridView1[2, i].Value = ConsigneeCombo.Text;
}
}
我当前的GetData代码是：
private DataTable GetData(string userFileName)
{
string dirName = Path.GetDirectoryName(userFileName);
string fileName = Path.GetFileName(userFileName);
string fileExtension = Path.GetExtension(userFileName);
string connection = string.Empty;
string query = string.Empty;
switch (fileExtension)
{
case ".xls":
connection = $@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={userFileName};" +
"Extended Properties=\"Excel 8.0; HDR=Yes; IMEX=1\"";
string sheetNamexls;
using (OleDbConnection con = new OleDbConnection(connection))
{
con.Open();
var dtSchema = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
sheetNamexls = dtSchema.Rows[0].Field<string>("TABLE_NAME");
}
if (sheetNamexls.Length <= 0) throw new InvalidDataException("No sheet found.");
query = $"SELECT * FROM [{sheetNamexls}]";
break;
case ".xlsx":
connection = $@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={userFileName};" +
"Extended Properties=\"Excel 12.0; HDR=Yes; IMEX=1\"";
string sheetName;
using (OleDbConnection con = new OleDbConnection(connection))
{
con.Open();
var dtSchema = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
sheetName = dtSchema.Rows[0].Field<string>("TABLE_NAME");
}
if (sheetName.Length <= 0) throw new InvalidDataException("No sheet found.");
query = $"SELECT * FROM [{sheetName}]";
break;
case ".csv":
connection = $@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={dirName};" +
"Extended Properties=\"text; HDR=Yes; IMEX=1; FMT=Delimited\"";
query = $"SELECT * FROM [{fileName}]";
break;
}
return FillData(connection, query);
}
我尝试添加ClearFormats();方法，但无法使其正常工作。
完整代码：
using System;
using System.Data;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Data.OleDb;
using System.Data.SqlClient;
namespace DrayIn
{
public partial class DrayIn : Form
{
public DrayIn()
{
InitializeComponent();
using (SqlConnection sqlConnection = new SqlConnection("ConnDetails"))
{
SqlCommand sqlCmd = new SqlCommand(@"SELECT Id
FROM ref_bizunit_scoped sh
WHERE sh.role = 'SHIPPER'
AND sh.Life_Cycle_State = 'ACT'
ORDER BY ID", sqlConnection);
sqlConnection.Open();
SqlDataReader sqlReader = sqlCmd.ExecuteReader();
while (sqlReader.Read())
{
ConsigneeCombo.Items.Add(sqlReader["Id"].ToString());
}
sqlReader.Close();
}
ConsigneeCombo.SelectedIndex = 0;
}
private DataTable FillData(string connection, string query)
{
DataTable dataTable = new DataTable();
using (OleDbConnection con = new OleDbConnection(connection))
{
con.Open();
OleDbDataAdapter adapter = new OleDbDataAdapter(query, con);
adapter.Fill(dataTable);
adapter.Dispose();
};
return dataTable;
}
private DataTable GetData(string userFileName)
{
string dirName = Path.GetDirectoryName(userFileName);
string fileName = Path.GetFileName(userFileName);
string fileExtension = Path.GetExtension(userFileName);
string connection = string.Empty;
string query = string.Empty;
switch (fileExtension)
{
case ".xls":
connection = $@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source={userFileName};" +
"Extended Properties=\"Excel 8.0; HDR=Yes; IMEX=1\"";
string sheetNamexls;
using (OleDbConnection con = new OleDbConnection(connection))
{
con.Open();
var dtSchema = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
sheetNamexls = dtSchema.Rows[0].Field<string>("TABLE_NAME");
}
if (sheetNamexls.Length <= 0) throw new InvalidDataException("No sheet found.");
query = $"SELECT * FROM [{sheetNamexls}]";
break;
case ".xlsx":
connection = $@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={userFileName};" +
"Extended Properties=\"Excel 12.0; HDR=Yes; IMEX=1\"";
string sheetName;
using (OleDbConnection con = new OleDbConnection(connection))
{
con.Open();
var dtSchema = con.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, new object[] { null, null, null, "TABLE" });
sheetName = dtSchema.Rows[0].Field<string>("TABLE_NAME");
}
if (sheetName.Length <= 0) throw new InvalidDataException("No sheet found.");
query = $"SELECT * FROM [{sheetName}]";
break;
case ".csv":
connection = $@"Provider=Microsoft.ACE.OLEDB.12.0;Data Source={dirName};" +
"Extended Properties=\"text; HDR=Yes; IMEX=1; FMT=Delimited\"";
query = $"SELECT * FROM [{fileName}]";
break;
}
return FillData(connection, query);
}
private void Browse_Click(object sender, EventArgs e)
{
fileTextBox.Visible = true;
ConsigneeCombo.Visible = true;
updateExcel.Visible = true;
dataGridView1.Visible = true;
saveExcel.Visible = true;
consigneeLabel.Visible = true;
fileLabel.Visible = true;
string userFileNameUT = string.Empty;
string fileExtensionUT = string.Empty;
using (OpenFileDialog ofd = new OpenFileDialog())
{
ofd.InitialDirectory = Environment.GetFolderPath(Environment.SpecialFolder.Desktop);
ofd.Filter = "CSV Files|*.csv|Excel '97-2003|*.xls|Excel 2007-2019|*.xlsx";
if (ofd.ShowDialog(this) == DialogResult.OK)
{
fileExtensionUT = Path.GetExtension(ofd.FileName);
userFileNameUT = ofd.FileName;
}
else
{
fileTextBox.Visible = false;
ConsigneeCombo.Visible = false;
updateExcel.Visible = false;
dataGridView1.Visible = false;
saveExcel.Visible = false;
consigneeLabel.Visible = false;
fileLabel.Visible = false;
}
}
string extensionMix = string.Empty;
if (fileExtensionUT == ".csv") extensionMix = ".csv";
else if (fileExtensionUT == ".xls") extensionMix = ".xls";
else if (fileExtensionUT == ".xlsx") extensionMix = ".xlsx";
if (userFileNameUT.Length == 0) return;
string userFileName = Path.Combine(Path.GetDirectoryName(userFileNameUT), Path.GetFileNameWithoutExtension(userFileNameUT.Replace(".", "")) + extensionMix);
File.Copy(userFileNameUT, userFileName, true);
this.dataGridView1.DataSource = GetData(userFileName);
fileTextBox.Text = userFileNameUT;
textBox4.Text = userFileName;
textBox1.Text = Path.GetFileName(userFileNameUT);
}
private void updateExcel_Click(object sender, EventArgs e)
{
for (int i = 0; i < dataGridView1.RowCount - 1; i++)
{
dataGridView1[2, i].Value = ConsigneeCombo.Text;
}
}
public void ToCsV(DataGridView dGV, string filename)
{
string stOutput = "";
string sHeaders = "";
for (int j = 0; j < dataGridView1.Columns.Count; j++)
sHeaders = sHeaders.ToString() + Convert.ToString(dataGridView1.Columns[j].HeaderText) + ",";
stOutput += sHeaders + "\r\n";
for (int i = 0; i < dataGridView1.RowCount - 1; i++)
{
string stLine = "";
for (int j = 0; j < dataGridView1.Rows[i].Cells.Count; j++)
stLine = stLine.ToString() + Convert.ToString(dataGridView1.Rows[i].Cells[j].Value) + ",";
stOutput += stLine + "\r\n";
}
Encoding utf16 = Encoding.GetEncoding(1254);
byte[] output = utf16.GetBytes(stOutput);
FileStream fs = new FileStream(filename, FileMode.Create);
BinaryWriter bw = new BinaryWriter(fs);
bw.Write(output, 0, output.Length);
bw.Flush();
bw.Close();
fs.Close();
}
private void saveExcel_Click_1(object sender, EventArgs e)
{
SaveFileDialog sfd = new SaveFileDialog();
sfd.Title = "Save Excel Files";
sfd.CheckPathExists = true;
sfd.DefaultExt = "csv";
sfd.Filter = "Excel Files|*.csv";
string saveFileName = textBox1.Text;
string fileExtensionTrim = Path.GetExtension(saveFileName);
string subFinalSaveName = textBox1.Text;
string finalSaveName = Path.GetFileNameWithoutExtension(subFinalSaveName) + ".csv";
textBox3.Text = finalSaveName;
sfd.FileName = finalSaveName;
sfd.InitialDirectory = @"C:";
if (sfd.ShowDialog() == DialogResult.OK)
{
ToCsV(dataGridView1, sfd.FileName);
string userFileName = textBox4.Text;
File.Delete(userFileName);
fileTextBox.Visible = false;
ConsigneeCombo.Visible = false;
updateExcel.Visible = false;
dataGridView1.Visible = false;
saveExcel.Visible = false;
consigneeLabel.Visible = false;
fileLabel.Visible = false;
}
else
{
fileTextBox.Visible = true;
ConsigneeCombo.Visible = true;
updateExcel.Visible = true;
dataGridView1.Visible = true;
saveExcel.Visible = true;
consigneeLabel.Visible = true;
fileLabel.Visible = true;
}
}
}
}
答案 0 :(得分：1)
运行代码时，
updateExcel_Click部分将列C更新为ConsigneeCombo框中每一行的内容，但是如果我是 处理具有格式化，例如10行带边框，但只有8行 其中的每一行都带有文本，由于格式，它会全部更新10
马特，很抱歉，但是您发布的代码与Excel无关。它无条件更新dataGridView1单元。因此，如果您只想更新部分单元格，则必须添加条件：
private void updateExcel_Click(object sender, EventArgs e)
{
for (int i = 0; i < dataGridView1.RowCount - 1; i++)
{
if(_your_logic_here_)
dataGridView1[2, i].Value = ConsigneeCombo.Text;
}
}
但是，我确实相信这不是您想要的，因为您正在使用OleDb提供程序来获取/获取Excel数据。
请注意，OleDb提供程序公开了提供CRUD操作的方法。您可以通过OleDbCommand INSERT（创建），SELECT（读取），UPDATE（修改）和DELETE（销毁）Excel数据。
因此，如果您想UPDATE数据，请使用以下语句：
UPDATE [SheetNameOrTableName$]
SET FieldName=NewValue
WHERE FieldName=OldValue
您必须将其作为字符串传递给OleDbCommand.Command：
string sSQL = @"UPDATE [SheetNameOrTableName$]
SET FieldName=?
WHERE FieldName=?";
或
string sSQL = @"UPDATE [SheetNameOrTableName$]
SET FieldName=@param1
WHERE FieldName=@param2";
但是我必须警告您：JET / ACE的OleDb提供程序无法识别命名参数！因此，您必须按正确的顺序向OleDbCommand添加参数！
最后，我建议您重新考虑您的应用程序，并将业务逻辑与数据访问分开。参见：
Creating a Data Access Layer (C#)
Creating a Business Logic Layer (C#)
Writing a Portable Data Access Layer
以上文章提供了ASP.NET页面的信息，但WinForms的逻辑必须相同！
DAL类的Excel文件的一部分可能如下所示：
public class ExcelDAL
{
private string sExcelFile = string.Empty;
private string sExcelSheet = string.Empty;
private bool bUseHeaders = false;
private bool bUseIMEX = false;
public ExcelDAL(string _ExcelFile, string _ExcelSheet, bool _UseHeaders, bool _UseIMEX)
{
sExcelFile = _ExcelFile;
sExcelSheet = _ExcelSheet;
bUseHeaders = _UseHeaders;
}
private string GetConnString()
{
string suh = bUseHeaders ? "YES" : "NO";
string sui = bUseIMEX ? "IMEX=1;" : "";
return string.Format("Provider=Microsoft.ACE.OLEDB.12.0;Data Source={0};Extended Properties='Excel 12.0;HDR={1}';{2}", sExcelFile, suh, sui);
}
public DataTable GetSheetData()
{
DataTable dt = new DataTable();
using (OleDbConnection connection = new OleDbConnection(GetConnString()))
{
string sql = string.Format(@"SELECT * FROM [{0}$];", sExcelSheet);
connection.Open();
using(OleDbCommand command = new OleDbCommand(sql, connection))
{
using (OleDbDataReader reader = command.ExecuteReader())
{
dt.Load(reader);
}
}
}
return dt;
}
//other members and methods of DAL class
}
随时根据您的需求改进ExcelDAL类。
祝你好运！
答案 1 :(得分：1)
我同意@Maciej Los，您的问题似乎集中在“ Excel”中，但是在将ComboBox中的文本添加到第三行中时，代码在“ Excel”中没有任何作用DataGridView中所有行的列。这很令人困惑，我将从DataGridView的角度开始，因为这是当前代码所使用的。
根据您的评论…
....如果我正在处理的文件具有格式，例如10行 带有边框，但其中只有8行带有文本，它将更新所有10个边框 因为格式。
这不一定是准确的……由于“格式”，代码没有更新它们……因为有十（10）行，因此正在“更新”它们！ ……发布的代码只是在网格中的所有行中循环。它不检查任何格式，也不检查行是否为“空”！
当您在空白单元格中“读取”具有单元格格式的“ Excel”文件时（如您所述）……它将在读取时被拾取，甚至在数据源中也将变成“行”，甚至尽管所有单元格可能都是空的。这是一个“ Excel”问题，我知道有一个解决方案，它将在您的代码读取“ Excel”文件之前“删除”所有这些“空”单元格，从而从头开始“消除”这些“空”行。 >
我希望我不会错过任何东西...。
要使用DatGridView进行此操作，可以创建一个小的方法，该方法给定网格中的行索引，如果行为“空”文本，则返回true。从现有的updateExcel_Click调用此方法……可能看起来像下面的样子……
private void updateExcel_Click(object sender, EventArgs e) {
for (int i = 0; i < dataGridView1.RowCount - 1; i++) {
if (!RowIsEmpty(i)) {
dataGridView1[2, i].Value = ConsigneeCombo.Text;
}
}
}
private bool RowIsEmpty(int rowIndex) {
for (int i = 0; i < dataGridView1.ColumnCount; i++) {
if (dataGridView1.Rows[rowIndex].Cells[i].Value != null &&
dataGridView1.Rows[rowIndex].Cells[i].Value.ToString() != "") {
return false;
}
}
return true;
}
关于从Excel文件中删除“空格式”的单元格……
Fastest method to remove Empty rows and Columns From Excel Files using Interop
可能会有所帮助。我知道它使用“互操作”，但是，我相信使用OLEDB实施它并不困难。基本上，将Excel工作表中的“ usedRange”读入对象数组，该数组将删除此格式。
如果我缺少导入内容，请告诉我。希望这会有所帮助。