Question

我正在尝试读取文本文件并将内容显示到datagridview。我的问题是我不知道如何阅读文本文件的所有内容并在datagridview中显示特定的行。

我的文本文件内容的格式如下：

A1 = SUPERSTAR RETRO'
N1 =檀'
C1 = CHUCK TAYLOR'
A1 = CLOUDFOAM RACE'
N1 =雅诺斯基'
C1 = HIGH CUT'

我有3个名为ADIDAS，NIKE和CONVERSE的列的datagridview。现在我想要显示所有AI到ADIDAS，所有N1到NIKE和所有C1到CONVERSE就像这样：

ADIDAS NIKE CONVERSE

SUPERSTAR RETRO 檀 HIGH CUT

CLOUDFOAM RACE JANOSKI CHUCK TAYLOR

Answer 1

所以我会将文本文件传递给字符串并使用它：

Dim SearchWithinThis As String = "A1=SUPERSTAR RETRO'
                                  N1=TANJUN'
                                  C1=CHUCK TAYLOR'
                                  A1=CLOUDFOAM RACE'
                                  N1=JANOSKI'
                                  C1=HIGH CUT'"
Dim SearchForThisBegining As String = "A1" 'You can put whatever you need to find
Dim SearchForThisEnd As String = " " 'to find the end of the line
Dim FirstCharacter As Integer = SearchWithinThis.IndexOf(SearchForThisBegining)
Dim LastCharacter As Integer = SearchWithinThis.IndexOf(SearchForThisEnd)

现在，您可以遍历循环并将找到的值存储到GridView。

Answer 2

你的文字文件在每一行的末尾是否真的有'？

我会创建三个集合：

Dim nikeItems as New List(Of String)()
'etc

然后拆分文件内容：

For Each line As String In file.Split(Environment.NewLine)
    Dim lineContent as String() = line.Split("="c)
    Select Case (lineContent(0))
        Case "N1": nikeItems.Add(lineContent(1))
        ' etc.
Next

然后从这些列表中填充数据网格。

Answer 3

这将做你想要的！我包括一些额外的示例，以将数据从GridView发送到SQL Server数据库。此外，还有一些代码可以在您完成项目时关闭项目。

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 System.IO;
using System.Globalization;
using System.Configuration;
using System.Data.OleDb;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

         public void button1_Click(object sender, EventArgs e)
         {
         string delimiter = ",";
         string tablename = "medTable";
         DataSet dataset = new DataSet();
         OpenFileDialog openFileDialog1 = new OpenFileDialog();
         openFileDialog1.Filter = "CSV Files (*.csv)|*.csv|All Files (*.*)|*.*";
         openFileDialog1.FilterIndex = 1;
         if (openFileDialog1.ShowDialog() == DialogResult.OK)
         {
         if (MessageBox.Show("Are you sure you want to import the data from \n " + openFileDialog1.FileName + "?", "Are you sure?", MessageBoxButtons.YesNo) == DialogResult.Yes)
         {
         filename = openFileDialog1.FileName;
         StreamReader sr = new StreamReader(filename);
         string csv = File.ReadAllText(openFileDialog1.FileName);
         dataset.Tables.Add(tablename);
         dataset.Tables[tablename].Columns.Add("Order ID");
         dataset.Tables[tablename].Columns.Add("Product");
         dataset.Tables[tablename].Columns.Add("Unit Price");
         dataset.Tables[tablename].Columns.Add("Quantity");
         dataset.Tables[tablename].Columns.Add("Discount");

         string allData = sr.ReadToEnd();
         string[] rows = allData.Split("\r".ToCharArray());

         foreach (string r in rows)
         {
         string[] items = r.Split(delimiter.ToCharArray());
         dataset.Tables[tablename].Rows.Add(items);
         }
         this.dataGridView1.DataSource = dataset.Tables[0].DefaultView;
         MessageBox.Show(filename + " was successfully imported. \n Please review all data before sending it to the database.", "Success!", MessageBoxButtons.OK);
         }
         else
         {
         this.Close();
         }
         }
         }

         public string filename { get; set; }


         private void openFileDialog1_FileOk(object sender, CancelEventArgs e)
         {

         }

         private void Import_Load(object sender, EventArgs e)
         {

         }

         private void button4_Click(object sender, EventArgs e)
         {
         Application.Exit();

         }

         private void button2_Click(object sender, EventArgs e)
         {
         this.Close();
         }

         private void button3_Click(object sender, EventArgs e)

         //remove the semicolon, and add brackets below after line
         { 
         //create the connection string
             string connString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Users\\Ryan\\Desktop\\Coding\\Microsoft Access\\Northwind_2012.mdb";

             //create the database query
         string query = "SELECT * FROM [OrderDetailsTest]";

             //create an OleDbDataAdapter to execute the query
         OleDbDataAdapter dAdapter = new OleDbDataAdapter(query, connString);

             //create a command builder
         OleDbCommandBuilder cBuilder = new OleDbCommandBuilder(dAdapter);

             //create a DataTable to hold the query results
         DataTable dTable = new DataTable();

             //fill the DataTable
         dAdapter.Fill(dTable);

             //the DataGridView
         DataGridView dataGridView1 = new DataGridView();

             //BindingSource to sync DataTable and DataGridView
         BindingSource bSource = new BindingSource();

             //set the BindingSource DataSource
         bSource.DataSource = dTable;

             //set the DataGridView DataSource
         dataGridView1.DataSource = bSource;

             // An update function to get the changes back into the database.
         dAdapter.Update(dTable);
         }
    }
 }

读取文本文件并显示到datagridview

3 个答案: