问题描述
我正在尝试允许用户将现有信息上载到数据表。这是用于上传的代码：
private void label30_Click(object sender,EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
if (ofd.ShowDialog() == DialogResult.OK)
{
StreamReader read = new StreamReader(File.OpenRead(ofd.FileName));
string[] lines = File.ReadAllLines(ofd.FileName);
string[] values;
for (int i = 31; i < lines.Length; i++)
{
values = lines[i].ToString().Split(',');
string[] row = new string[values.Length];
for (int j = 0; j < values.Length; j++)
{
row[j] = values[j].Trim();
}
stkSheetdgv.Rows.Add(row);
read.Close();
read.dispose();
}
}
}
文本文件中还有很多其他信息，因此是int i = 31的原因。我得到system.invalidOperationException: 'Rows cannot be programmatically added to the DataGridView's rows collection when the control is data-bound.'
有人可以告诉我要进行这项工作缺少什么吗？如果需要，我可以为dt添加更多代码。让我知道。
stkSheetdgv.AutoGenerateColumns = false;
DataTable dt = new DataTable();
dt.Columns.Add("Wire",typeof(String));
dt.Columns.Add("Pole",typeof(String));
dt.Columns.Add("Primary Unit",typeof(String));
dt.Columns.Add("Down Guy",typeof(String));
dt.Columns.Add("Anchor",typeof(String));
dt.Columns.Add("Transformer",typeof(String));
dt.Columns.Add("Ground",typeof(String));
dt.Columns.Add("Riser/disconnect",typeof(String));
dt.Columns.Add("Misc.",typeof(String));
DataGridViewComboBoxColumn wire = new DataGridViewComboBoxColumn();
var wirelist = new List<string>() {"AAC 1/0 POPPY","AAC 477 COSMOS"};
wire.DataSource = wirelist;
wire.HeaderText = "Wire";
wire.DataPropertyName = "Wire";
DataGridViewComboBoxColumn pole = new DataGridViewComboBoxColumn();
var polelist = new List<string>() {"30C4 CCA","30C5 CCA"};
pole.DataSource = polelist;
pole.HeaderText = "Pole";
pole.DataPropertyName = "Pole";
DataGridViewComboBoxColumn primary = new DataGridViewComboBoxColumn();
var primarylist = new List<string>() {"C1-LD","C2-LD"};
primary.DataSource = primarylist;
primary.HeaderText = "Primary Unit";
primary.DataPropertyName = "Primary Unit";
DataGridViewComboBoxColumn down = new DataGridViewComboBoxColumn();
var downlist = new List<string>() {"E1-5-144","E1-5-144P"};
down.DataSource = downlist;
down.HeaderText = "Down Guy";
down.DataPropertyName = "Down Guy";
DataGridViewComboBoxColumn anch = new DataGridViewComboBoxColumn();
var anchlist = new List<string>() {"F1-2 Expansion","F1-2 Plate"};
anch.DataSource = anchlist;
anch.HeaderText = "Anchor";
anch.DataPropertyName = "Anchor";
DataGridViewComboBoxColumn trans = new DataGridViewComboBoxColumn();
var translist = new List<string>() { "G311-15kVA","G311-25kVA"};
trans.DataSource = translist;
trans.HeaderText = "Transformer";
trans.DataPropertyName = "Transformer";
DataGridViewComboBoxColumn ground = new DataGridViewComboBoxColumn();
var groundlist = new List<string>() { "M2-12","M2-11" };
ground.DataSource = groundlist;
ground.HeaderText = "Ground";
ground.DataPropertyName = "Ground";
DataGridViewComboBoxColumn rise = new DataGridViewComboBoxColumn();
var riserlist = new List<string>() { "M8-60-10'","M8-100-10'"};
rise.DataSource = riserlist;
rise.HeaderText = "Riser/disconnect";
rise.DataPropertyName = "Riser/disconnect";
DataGridViewComboBoxColumn misc = new DataGridViewComboBoxColumn();
var misclist = new List<string>() { "M5-5LD","M5-5HD"};
misc.DataSource = misclist;
misc.HeaderText = "Misc.";
misc.DataPropertyName = "Misc.";
stkSheetdgv.DataSource = dt;
stkSheetdgv.Columns.AddRange(wire,pole,primary,down,anch,trans,ground,rise,misc);
stkSheetdgv.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
解决方法
解决此问题的方法有两种，一种是通过删除DataSource上的stkSheetdgv.DataSource = dt;的分配（例如，删除DataGridView），或者是添加到{{1} }明确地：
代码
DataSource修改
收到错误的原因是csv的列数多于private void label30_Click(object sender,EventArgs e)
{
DataTable dataTable = (DataTable)stkSheetdgv.DataSource;
OpenFileDialog ofd = new OpenFileDialog();
if (ofd.ShowDialog() == DialogResult.OK)
{
using (StreamReader read = new StreamReader(File.OpenRead(ofd.FileName)))
{
string[] lines = File.ReadAllLines(ofd.FileName);
string[] values;
for (int i = 31; i < lines.Length; i++)
{
values = lines[i].ToString().Split(',');
var dataRow = dataTable.NewRow();
for (int j = 0; j < values.Length; j++)
{
dataRow[j] = values[j].Trim();
}
dataTable.Rows.Add(dataRow);
dataTable.AcceptChanges();
}
}
}
}
中指定的列数。我使用的CSV文件是：
DataTable哪个对我来说工作得很好。