DatagridView 在连接归档时显示错误

Question

在 filing 惊人地保存数据和检索 DataGridView 上的记录时出现问题这是我正在尝试的代码，但它也显示列的 Last Value 和 1st value像这样的下一列是文件中的信息，文件中的数据如下：

3519,laiba,99

3519,maheen,89

这是我的代码：

 private void btnsave_Click(object sender, EventArgs e)
        {
            FileStream f = new FileStream("D://abc.txt", FileMode.Append, FileAccess.Write);
            StreamWriter sw = new StreamWriter(f);
            sw.Write(txtregno.Text+","+txtname.Text+","+txtmarks.Text+";");
            MessageBox.Show("Saved Successfully");
            sw.Close();
        }

        private void btnshow_Click(object sender, EventArgs e)
        {
            FileStream f = new FileStream("D://abc.txt", FileMode.Open, FileAccess.Read);
            StreamReader sr = new StreamReader(f);
            string data = sr.ReadToEnd();
            string[] lineWiseRecord = data.Split(';');
            foreach (string item in lineWiseRecord)
            {
                string[] colWiseRecord = item.Split(','); 
                    dataGridView1.Rows.Add(colWiseRecord[0], colWiseRecord[1], colWiseRecord[2] );
            }
            f.Close();
            sr.Close();
        }

Answer 1

您的代码将抛出错误，不能运行。为datagridview指定列数，然后通过foreach循环将数据加载到datagirdview中，这样就可以看到txt文档中的所有数据了。这是我的代码，你可以试试下面的代码来替换它。

private void btnsave_Click(object sender, EventArgs e)
        {
            FileStream f = new FileStream("D://abc.txt", FileMode.Append, FileAccess.Write);
            StreamWriter sw = new StreamWriter(f);
            sw.Write(txtregno.Text + "," + txtname.Text + "," + txtmarks.Text + ";");
            MessageBox.Show("Saved Successfully");
            sw.Close();
        }

        

        private void btnshow_Click_1(object sender, EventArgs e)
        {
            FileStream f = new FileStream("D://abc.txt", FileMode.Open, FileAccess.Read);
            StreamReader sr = new StreamReader(f);
            string data = sr.ReadToEnd();
            string[] lineWiseRecord = data.Split(';');
            dataGridView1.ColumnCount = 3;
            dataGridView1.Columns[0].Name = "regno";
            dataGridView1.Columns[1].Name = "Name";
            dataGridView1.Columns[2].Name = "Mark%";

            foreach (string item in lineWiseRecord)
            {
                string[] colWiseRecord = item.Split(',');
                dataGridView1.Rows.Add(colWiseRecord);
            }
            f.Close();
            sr.Close();
        }

结果：

DatagridView 在连接归档时显示错误

DatagridView displaying error when connected with filing

c#

datagridview

read-write