Question

我正在开发在wpf中具有datagridview的软件，其中在单击插入按钮时通过datagridview中的字段成功插入了值。但是，当我单击更新时，出现以下异常。在下面找到错误的屏幕截图：

我自己尝试过的代码如下：

public partial class Machine : Window
{

    SqlConnection conn = new SqlConnection(@"Data Source=.\SQLEXPRESS;AttachDbFilename=D:\ATS\ATS Data Management System\ATS Data Management System\ATSDataManagementsystemDB.mdf;Integrated Security=True;User Instance=True");
    public Machine()
    {
        InitializeComponent();
        MaxHeight = SystemParameters.MaximizedPrimaryScreenHeight;
        MaxWidth = SystemParameters.MaximizedPrimaryScreenWidth;
        BindMyData();
    }
    public void BindMyData()
    {
        try
        {
            conn.Open();
            SqlCommand comm = new SqlCommand("SELECT * FROM tblmachines", conn);
            DataSet ds = new DataSet();
            SqlDataAdapter da = new SqlDataAdapter(comm);
            da.Fill(ds);
            gridmachine.ItemsSource = ds.Tables[0].DefaultView;
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message.ToString());
        }
        finally
        {
            conn.Close();
        }
    }


    private void btninsert_Click(object sender, RoutedEventArgs e)
    {
        try
        {
            conn.Open();
            SqlCommand comm = new SqlCommand("INSERT INTO tblmachines VALUES('" + txtid.Text + "','" + txtsalesdate.Text + "','" + txtname.Text + "','" + txtpartname.Text + "','" + txtprice.Text + "','" + txtquantity.Text + "','" + txttotalamount.Text + "','" + paidpending.Text + "','" + txtpaidamount.Text + "','" + txtpendingamount.Text + "','" + txtcreditamountpaid.Text + "','" + txtpaiddate.Text + "','" + txtpaymentmode.Text + "')", conn);
            comm.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message.ToString());
        }
        finally
        {
            conn.Close();
            BindMyData();
        }
    }

    private void btnupdate_Click(object sender, RoutedEventArgs e)
    {
        try
        {
            conn.Open();
            SqlCommand comm = new SqlCommand("UPDATE tblmachines SET SalesDate='" +txtsalesdate.Text+ "',Name='" +txtname.Text+"',Part Name='"+txtpartname.Text+"',Price="+txtprice.Text+",Quantity="+txtquantity.Text+",Total Amount="+txttotalamount.Text+",PaymentStatus='"+paidpending.Text+"',Paid Amount="+txtpaidamount.Text+",Pending Amount="+txtpendingamount.Text+",Credit Amount Paid="+txtcreditamountpaid.Text+",Paid Date='"+txtpaiddate.Text+"',Payment Mode='"+txtpaymentmode.Text+"'WHERE Id=" + txtid.Text + "", conn);
            comm.ExecuteNonQuery();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message.ToString());
        }
        finally
        {
            conn.Close();
            BindMyData();
        }
    }
}

}

我希望数据得到更新并显示在数据网格视图中，但不会发生。

Answer 1

检查您的Part Name，Paid Amount，Pending Amount和Credit Amount Paid列，我认为错误是列名

SqlCommand comm = new SqlCommand("UPDATE tblmachines SET SalesDate='" +txtsalesdate.Text+ "',Name='" +txtname.Text+"',Part Name='"+txtpartname.Text+"',Price="+txtprice.Text+",Quantity="+txtquantity.Text+",Total Amount="+txttotalamount.Text+",PaymentStatus='"+paidpending.Text+"',Paid Amount="+txtpaidamount.Text+",Pending Amount="+txtpendingamount.Text+",Credit Amount Paid="+txtcreditamountpaid.Text+",Paid Date='"+txtpaiddate.Text+"',Payment Mode='"+txtpaymentmode.Text+"'WHERE Id=" + txtid.Text + "", conn);

您还应该在WHERE中添加空格显示您的表结构

如何根据其ID更新datagridview？

1 个答案: