[英]How can I update a text file when I move from gridview to textbox
我將文本讀取到GridView,然后將其從GridView移到TextBoxes進行編輯。 如何替換選擇行中更改的數據並保存到我的文本文件中?
這是我的寫文件
private void button1_Click(object sender, EventArgs e)
{
using (System.IO.StreamWriter file =
new System.IO.StreamWriter(@"WriteLines2.txt", true))
{
file.WriteLine(this.id.Text + "#" + this.judul.Text + "#" + this.isi.Text);
}
}
這是我的gridview
System.IO.StreamReader file = new System.IO.StreamReader("WriteLines2.txt");
string[] columnnames = file.ReadLine().Split('#');
DataTable dt = new DataTable();
foreach (string c in columnnames)
{
dt.Columns.Add(c);
}
string newline;
while ((newline = file.ReadLine()) != null)
{
DataRow dr = dt.NewRow();
string[] values = newline.Split('#');
for (int i = 0; i < values.Length; i++)
{
dr[i] = values[i];
}
dt.Rows.Add(dr);
}
file.Close();
GridView.DataSource = dt;
這是我的網格視圖移到文本框
private void GridView_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
DataGridViewRow dr = GridView.SelectedRows[0];
id.Text = dr.Cells["id"].Value.ToString();
// or simply use column name instead of index
//dr.Cells["id"].Value.ToString();
judul.Text = dr.Cells["judul"].Value.ToString();
isi.Text = dr.Cells["subjek"].Value.ToString();
//textBox4.Text = dr.Cells[3].Value.ToString();
GridView.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
}
您應該調用GridView.SelectionMode = DataGridViewSelectionMode.FullRowSelect;
當您初始化DataGridView時,而不是在CellContentClick
期間。 然后使用SelectionChanged Event
而不是CellContentClick Event
並使用CurrentCell.RowIndex
作為索引:
private void GridView_SelectionChanged(object sender, EventArgs e)
{
DataGridViewRow dr = GridView.Rows[GridView.CurrentCell.RowIndex];
id.Text = dr.Cells[0].Value.ToString();
judul.Text = dr.Cells[1].Value.ToString();
isi.Text = dr.Cells[2].Value.ToString();
}
您的buton1_Click
會在文件末尾添加一個新值。 我不確定這是否是您想要的。
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