Question

所以，我正在创建一个程序来检查客户端的名称。但是我得到了这个错误。＆＃34;没有行可以添加到没有列的DataGridView控件。必须先添加列。＆＃39;＆＃34; 我不确定此时该做什么，因为它都是正确编码的。我只是，我不明白它为什么不起作用。我的一个朋友正在使用完全相同的代码，他的构建工作完美无瑕。

这是我的代码。

        private void PopulateDataGrideView(string Name, string Status)
    {
        if (base.InvokeRequired)
        {
            base.BeginInvoke(new MethodInvoker(() => {
                DataGridViewRow dataGridViewRow = new DataGridViewRow();
                if (Status == "Yes")
                {
                    dataGridViewRow.DefaultCellStyle.BackColor = Color.LightGreen;
                    Status = "Name Available";
                }
                else if (Status == "No")
                {
                    dataGridViewRow.DefaultCellStyle.BackColor = Color.Red;
                    Status = "Not Available";
                    if (this.VisibilityBx.Checked)
                    {
                        dataGridViewRow.Visible = false;
                    }
                }
                dataGridViewRow.CreateCells(this.checkedNames, new object[] { Name, Status });
                this.checkedNames.Rows.Add(dataGridViewRow);
                if (scrollBx.Checked)
                {
                    this.checkedNames.FirstDisplayedScrollingRowIndex = this.checkedNames.RowCount - 1;
                }
                this.progressBar1.Increment(1);
            }));
        }
    }

    private void saveAvailableNamesToolStripMenuItem_Click(object sender, EventArgs e)
    {
        List<string> strs = new List<string>();
        if (this.checkedNames.Rows.Count > 0)
        {
            foreach (DataGridViewRow row in (IEnumerable)this.checkedNames.Rows)
            {
                if (row.Cells[1].Value.Equals("Name Available"))
                {
                    strs.Add(row.Cells[0].Value.ToString());
                }
            }
            if (strs.Count > 0)
            {
                string currentDirectory = Environment.CurrentDirectory;
                DateTime now = DateTime.Now;
                File.WriteAllLines(string.Concat(currentDirectory, "\\Available Names ", now.ToString("dd-MM-yyyy HH.mm.ss tt"), ".txt"), strs);
            }
        }
    }

    private void saveTakenNamesToolStripMenuItem_Click(object sender, EventArgs e)
    {
        List<string> strs = new List<string>();
        if (this.checkedNames.Rows.Count > 0)
        {
            foreach (DataGridViewRow row in (IEnumerable)this.checkedNames.Rows)
            {
                if (row.Cells[1].Value.Equals("Not Available"))
                {
                    strs.Add(row.Cells[0].Value.ToString());
                }
            }
            if (strs.Count > 0)
            {
                string currentDirectory = Environment.CurrentDirectory;
                DateTime now = DateTime.Now;
                File.WriteAllLines(string.Concat(currentDirectory, "\\Taken Names ", now.ToString("dd-MM-yyyy HH.mm.ss tt"), ".txt"), strs);
            }
        }
    }

    private void scrollBx_CheckedChanged(object sender, EventArgs e)
    {
        if (this.checkedNames.RowCount > 0)
        {
            if (this.scrollBx.Checked)
            {
                this.checkedNames.FirstDisplayedScrollingRowIndex = this.checkedNames.RowCount - 1;
            }
            else if (!this.scrollBx.Checked)
            {
                this.checkedNames.FirstDisplayedScrollingRowIndex = 0;
            }
        }
    }

    private void VisibilityBx_CheckedChanged(object sender, EventArgs e)
    {
        if (this.checkedNames.Rows.Count > 0)
        {
            foreach (DataGridViewRow row in (IEnumerable)this.checkedNames.Rows)
            {
                if (!this.VisibilityBx.Checked)
                {
                    if (!row.Visible)
                    {
                        row.Visible = true;
                    }
                }
                else if (this.VisibilityBx.Checked)
                {
                    if ((string)row.Cells[1].Value == "Not Available")
                    {
                        row.Visible = false;
                    }
                }
            }
        }
    }

    private void Form1_Load(object sender, EventArgs e)
    {

    }

    private void CheckedNames_CellContentClick(object sender, DataGridViewCellEventArgs e)
    {

    }
}

}

Answer 1

使用：

DataGridViewRow row = (DataGridViewRow)YOURDATAGRIDVIEW.Rows[0].Clone();

创建要添加的新行，而不是：

DataGridViewRow dataGridViewRow = new DataGridViewRow();

这会保留新行中的列名。

您不再需要这行代码：

dataGridViewRow.CreateCells(this.checkedNames, new object[] { Name, Status });

还要确保数据网格视图具有列，这通常是导致此错误的原因。

没有行可以添加到没有列的DataGridView控件。必须先添加列。＆＃39;

1 个答案: