我試圖通過單擊按鈕來創建一個過程,該程序將從TextBoxes中獲取所有信息並將其設置在之前的特定行上,然後在Access數據庫中對其進行更改。更改現有行並刪除整行
我做了動態數據綁定,通過單擊任何DataGridView單元格中的一個內容,它可以完美地工作,它將整行的信息放入合適的TextBoxes中。我以類似於合適的列名稱的方式定義了文本框的名稱。
當我調試它時,程序停止並告訴我SQL命令有問題。
我還需要代碼如何刪除整行和更新數據庫,我不知道該怎麼做。
這裏是我寫的代碼:
namespace myProject
{
public partial class EditCodons : Form
{
private OleDbConnection dataConnection;
private int row;
private string name;
public EditCodons()
{
InitializeComponent();
OpenDb();
}
private void EditCodons_Load(object sender, EventArgs e)
{
// TODO: This line of code loads data into the 'myProjectDataSet.tblCodons' table. You can move, or remove it, as needed.
this.tblCodonsTableAdapter.Fill(this.myProjectDataSet.tblCodons);
}
private void OpenDb()
{
dataConnection = new OleDbConnection();
try
{
dataConnection.ConnectionString = @"Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Projects_2012\\Project_Noam\\Access\\myProject.accdb";
dataConnection.Open();
}
catch (Exception e)
{
MessageBox.Show("Error accessing the database: " +
e.Message,
"Errors",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
}
}
private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
this.row = e.RowIndex;
this.name = fullName.Text = dataGridView1.Rows[e.RowIndex].Cells[8].FormattedValue.ToString();
codon1.Text = dataGridView1.Rows[e.RowIndex].Cells[0].FormattedValue.ToString();
codon3.Text = dataGridView1.Rows[e.RowIndex].Cells[1].FormattedValue.ToString();
triplet1.Text = dataGridView1.Rows[e.RowIndex].Cells[2].FormattedValue.ToString();
triplet2.Text = dataGridView1.Rows[e.RowIndex].Cells[3].FormattedValue.ToString();
triplet3.Text = dataGridView1.Rows[e.RowIndex].Cells[4].FormattedValue.ToString();
triplet4.Text = dataGridView1.Rows[e.RowIndex].Cells[5].FormattedValue.ToString();
triplet5.Text = dataGridView1.Rows[e.RowIndex].Cells[6].FormattedValue.ToString();
triplet6.Text = dataGridView1.Rows[e.RowIndex].Cells[7].FormattedValue.ToString();
fullName.Text = dataGridView1.Rows[e.RowIndex].Cells[8].FormattedValue.ToString();
start.Text = dataGridView1.Rows[e.RowIndex].Cells[9].FormattedValue.ToString();
end.Text = dataGridView1.Rows[e.RowIndex].Cells[10].FormattedValue.ToString();
}
private void addRow_Click(object sender, EventArgs e)
{
}
private void update_Click(object sender, EventArgs e)
{
string connectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\\Projects_2012\\Project_Noam\\Access\\myProject.accdb";
OleDbConnection myConnection = new OleDbConnection(connectionString);
string myInsertQuery = "INSERT INTO tblCodons (codonsCodon1, codonsCodon3, codonsTriplet1, codonsTriplet2, codonsTriplet3,codonsTriplet4, codonsTriplet5, codonsTriplet6, codonsFullName, codonsStart, codonsEnd )" +
" Values(('codon1.Text', 'codon3.Text', 'triplet1.Text', 'triplet2.Text', 'triplet3.Text','triplet4.Text', 'triplet5.Text', 'triplet6.Text', 'fullName.Text', 'start.Text', 'end.Text')" +
"WHERE codonsFullName =" + this.name;
OleDbCommand myCommand = new OleDbCommand(myInsertQuery);
myCommand.Connection = myConnection;
myConnection.Open();
myCommand.ExecuteNonQuery();
myCommand.Connection.Close();
}
private void reset_Click(object sender, EventArgs e)
{
codon1.Clear();
codon3.Clear();
triplet1.Clear();
triplet2.Clear();
triplet3.Clear();
triplet4.Clear();
triplet5.Clear();
triplet6.Clear();
start.Clear();
end.Clear();
fullName.Clear();
}
private void deleteRow_Click(object sender, EventArgs e)
{
}
}
}
* 編輯: *我想你的SQL改變和 「錯誤列表」 寫入
錯誤1只分配,來電,增量,遞減和新的對象表達式可以用作語句C:\ Projects_2012 \ Project_Noam \ Project \ myProject \ myProject \ EditCodons.cs 82 myProject 錯誤2無效的表達式項')'C:\ Projects_2012 \ Project_Noam \ Project \ myProject \ myProject \ EditCodons.cs 82 60 myProject 錯誤3;預計C:\ Projects_2012 \ Project_Noam \項目\ myProject的\ myProject的\ EditCodons.cs 82 60 myProject的 ,所以我changet它這樣的:
string myInsertQuery =(String.Format("UPDATE tblCodons SET codonsCodon1='{0}', codonsCodon3='{1}', " +
"codonsTriplet1='{2}', codonsTriplet2='{3}', codonsTriplet3='{4}', codonsTriplet4='{5}', " +
"codonsTriplet5='{6}', codonsTriplet6='{7}', codonsFullName='{8}', codonsStart='{9}', " +
"codonsEnd='{10}' WHERE codonsFullName='{11}'",
triplet3.Text, triplet4.Text, triplet5.Text, triplet6.Text,
fullName.Text, start.Text, end.Text, this.name));
而且鋼不工作。我從最後的評論中得到錯誤。
當我嘗試單擊updaye按鈕錯誤消息顯示此:System.Data.OleDb.OleDbException(0x80040E10):無法爲一個或多個所需的參數值 – user1017315
如果您要刪除整行,我現在編輯的答案的第二部分應該從你的程序調用時工作: string myDeleteQuery =「DELETE FROM tblCodons WHERE codonsFullName ='」+ this.name +「'」; 我最初忘記了包括單引號,它應該也是你原來的評論引起錯誤的原因。您發佈的錯誤表示存在缺失或空的值,如果值周圍沒有單引號,則肯定會發生該值。如果你嘗試我的編輯,它應該工作。 – Ben
再次感謝'@Ben爲您的響應,但現在我得到另一個錯誤:「System.Data.OleDb.OleDbException(0x80040E14):語法錯誤(缺少運算符)表示查詢」.Ididn't嘗試刪除SQL順序,但 – user1017315