C# 替换为:&引用;用空格表示的符号(冒号)
我创建了一个将Excel文件转换为Access数据库的应用程序。在转换过程中,MACAddress列数据中的“:”符号需要替换为空格 我试图使用replace方法修改查询,但无效,它显示了一条错误消息: 未定义的函数“替换” 下面是我当前与replace函数一起使用的查询:C# 替换为:&引用;用空格表示的符号(冒号),c#,excel,ms-access,C#,Excel,Ms Access,我创建了一个将Excel文件转换为Access数据库的应用程序。在转换过程中,MACAddress列数据中的“:”符号需要替换为空格 我试图使用replace方法修改查询,但无效,它显示了一条错误消息: 未定义的函数“替换” 下面是我当前与replace函数一起使用的查询: cmd.CommandText = "INSERT INTO [MS Access;Database=" + Access + "].[NMS_List_Export] SELECT [IP Address] as [IPA
cmd.CommandText = "INSERT INTO [MS Access;Database=" + Access + "].[NMS_List_Export] SELECT [IP Address] as [IPAddress],Replace([Mac Address],':',' ') as [MACAddress],[Last seen on Channel] as [LastseenonChannel] FROM [NMS_List_Export$]";
有人能在这个问题上帮助我吗。提前谢谢
请查找完整的代码:
namespace NMS_Client
{
public partial class Form3 : Form
{
public Form3()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
if (File.Exists(@"C:\NMS_List_Export.mdb"))
{
File.Delete(@"C:\NMS_List_Export.mdb");
bool blnSuccess = CreateDB(@"C:\NMS_List_Export.mdb");
}
else
{
bool blnSuccess = CreateDB(@"C:\NMS_List_Export.mdb");
}
string Access = @"C:\NMS_List_Export.mdb";
string Excel = textBox1.Text.Replace("'\'", "'\\'");
string connect = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + Excel + ";Extended Properties=Excel 8.0;";
using (OleDbConnection conn = new OleDbConnection(connect))
{
using (OleDbCommand cmd = new OleDbCommand())
{
cmd.Connection = conn;
//Query is addressed
cmd.CommandText = "INSERT INTO [MS Access;Database=" + Access + "].[NMS_List_Export] SELECT [IP Address] as [IPAddress],[MAC Address]as [MACAddress],[Last seen on Channel] as [LastseenonChannel] FROM [NMS_List_Export$]";
conn.Open();
cmd.ExecuteNonQuery();
MessageBox.Show("The import is complete!");
}
}
}
//CreateDB Method
public static bool CreateDB(string pstrDB)
{
try
{
Catalog cat = new Catalog();
string strCreateDB = "";
strCreateDB += "Provider=Microsoft.Jet.OLEDB.4.0;";
strCreateDB += "Data Source=" + pstrDB + ";";
strCreateDB += "Jet OLEDB:Engine Type=5";
cat.Create(strCreateDB);
Table nTable = new Table();
nTable.Name = "NMS_List_Export";
nTable.Columns.Append("IPAddress", DataTypeEnum.adVarWChar,25);
nTable.Columns.Append("MACAddress", DataTypeEnum.adVarWChar,25);
nTable.Columns.Append("LastseenonChannel", DataTypeEnum.adVarWChar,25);
cat.Tables.Append(nTable);
return true;
}
catch (Exception)
{
MessageBox.Show("The import is incomplete!");
throw;
}
}
}
}
当前MAC地址列如下所示:
11:12:23:12
11:12:23:12
11:12:23:12
11:12:23:12
11:12:23:12
11:12:23:12
需要按以下方式转换:
11 12 23 12
11 12 23 12
11 12 23 12
11 12 23 12
11 12 23 12
11 12 23 12我无法确定您要使用哪个字符串,但听起来您需要研究字符串方法。更换是这样做的
"A:string".Replace(":", " ");
您能告诉我们您的替换是什么样子吗?由于我们没有本机SQL替换方法,我担心您将不得不手动执行此操作:
string strSelectSQL = "SELECT [IP Address] as [IPAddress], [MAC Address] as [MACAddress],[Last seen on Channel] as [LastseenonChannel] FROM [NMS_List_Export$]";
OleDbCommand selectCommand = new OleDbCommand(strSelectSQL, cmd.Connection);
OleDbParameter paramIP = new OleDbParameter("ip", "");
OleDbParameter paramMAC = new OleDbParameter("mac", "");
OleDbParameter paramLastSeen = new OleDbParameter("last_seen", "");
cmd.CommandText = "INSERT INTO [MS Access;Database=" + Access + "].[NMS_List_Export] VALUES (?, ?, ?)";
cmd.Parameters.Add(paramIP);
cmd.Parameters.Add(paramMAC);
cmd.Parameters.Add(paramLastSeen);
using (OleDbDataReader reader = selectCommand.ExecuteReader())
{
while (reader.Read())
{
paramIP.Value = reader[0].ToString();
paramMAC.Value = reader[1].ToString().Replace(":", " ");
paramLastSeen.Value = reader[2].ToString();
cmd.ExecuteNonQuery();
}
}
@CD。。您的编辑导致语法错误。请共享导致错误的代码。。那么你可能会得到正确的答案而不是建议。谢谢你的回复。尝试使用给定的代码。但它给出的错误消息称为“无法加载引用类型库”Microsoft.Office.Interop.Access.Dao。“库未注册。(HRESULT的异常:0x8002801D(type_E_LIBNOTREGISTERED))。我添加了此引用:“Microsoft.Office.Interop.Access.Dao”。请help@hansikaattanayake这是一个完全不同的问题,与你原来的问题毫无关系。。在我看来,你最好把这个问题作为新问题发表。