C# Datepicker 值未保存在 MySql 数据库中

Question

我正在使用 C# Winforms 创建一个 Master/Detail 的凭证系统，使用 MySql 作为后端。创建凭证 class 以设置以下内容：

1.Create 新凭证 2.保存凭证 3.查询凭证

目前保存凭证有问题，我已经设置了 Insert/Update/Delete 命令，使这个 post 简短我正在 posting 插入命令，这样应用程序的总体思路将是清除：

Class 变量

    ClsMgt da = new ClsMgt();

    MySqlDataAdapter sqlDataMaster = new MySqlDataAdapter();
    private DataSet oDs = null;
    MySqlCommand selectcommand = null;
    MySqlCommand insertcommand = null;
    MySqlCommand updatecommand = null;
    MySqlCommand deletecommand = null;
    private DataTable dt = null;
    private DataTable dtDet = null;
    private String sSelProcName = null;
    private String sInsProcName = null;
    private String sDelProcName = null;
    private String sUpdProcName = null;
    private int voucType;

    public MySqlConnection oCn = new MySqlConnection();
    MySqlTransaction oTrn = null;

以下是 NewVoucher 程序，它将 VoucherForm 设置为打开时显示空白记录：

 public DataSet NewVoucher()
    {
        DataSet vDs = new DataSet();
        oCn = da.GetConnection();

        if (oCn == null)
        {
            oCn.Open();
        }
        try
        {

            DataTable dt = new DataTable();

            //===============================================================================
            //--- Set up the Select Command
            //===============================================================================
            String sqlSelect = "Select vID, vTypeID, vNo, accCodeDR, accCodeCR, vDate, vChqNo, vChqDt, vPayName, vRemarks, vAmount from vMaster";
            sqlDataMaster = new MySqlDataAdapter(sqlSelect, oCn);
            sqlDataMaster.FillSchema(dt, SchemaType.Source);
            vDs.Tables.Add(dt);

            VoucherDetails vdet = new VoucherDetails();
            DataTable dtDet = new DataTable();
            dtDet = vdet.NewVoucherDet();

            vDs.Tables.Add(dtDet);

            vDs.Tables[0].Columns["vID"].AutoIncrement = true;
            vDs.Tables[0].Columns["vID"].AutoIncrementSeed = -1;
            vDs.Tables[0].Columns["vID"].AutoIncrementStep = -1;

            vDs.Tables[1].Columns["vID"].AutoIncrement = true;
            vDs.Tables[1].Columns["vID"].AutoIncrementSeed = -1;
            vDs.Tables[1].Columns["vID"].AutoIncrementStep = -1;
            vDs.EnforceConstraints = false;
            vDs.Relations.Add("VouchersToVoucherDetails", vDs.Tables[0].Columns["vID"], vDs.Tables[1].Columns["vID"]);

        }
        catch (MySqlException e)
        {
            MessageBox.Show(e.ToString());
        }

        return (vDs);
    }

以下是 SaveVoucher 程序：

 public void SaveVoucher(DataSet oDs)
    {
        oCn = da.GetConnection();
        oTrn = oCn.BeginTransaction();
        sqlDataMaster = new MySqlDataAdapter();
        try
        {

            if (oCn == null)
            {
                oCn.Open();
            }

            //===============================================================================
            //--- Set up the INSERT Command
           //===============================================================================
            sInsProcName = "prInsert_Voucher";
            insertcommand = new MySqlCommand(sInsProcName, oCn, oTrn);
            insertcommand.CommandType = CommandType.StoredProcedure;
            insertcommand.Parameters.Add(new MySqlParameter("nNewID", MySqlDbType.Int32, 0, "vID"));
            insertcommand.Parameters["nNewID"].Direction = ParameterDirection.Output;
            insertcommand.UpdatedRowSource = UpdateRowSource.OutputParameters;
            insertcommand.Parameters.Add("svTypeID", MySqlDbType.Int32,0, "vTypeID");
            insertcommand.Parameters.Add("svNo", MySqlDbType.Int32, 0, "vNo");
            insertcommand.Parameters.Add("svaccCodeDR", MySqlDbType.VarChar, 12, "accCodeDR");
            insertcommand.Parameters.Add("svaccCodeCR", MySqlDbType.VarChar, 12, "accCodeCR");
            insertcommand.Parameters.Add("svDate", MySqlDbType.DateTime);
            insertcommand.Parameters["svDate"].SourceColumn = "vDate";
            insertcommand.Parameters.Add("svChqNo", MySqlDbType.Int32, 0, "vChqNo");
            insertcommand.Parameters.Add("svChqDt", MySqlDbType.DateTime);
            insertcommand.Parameters["svChqDt"].SourceColumn = "vChqDt";
            insertcommand.Parameters.Add("svPayName", MySqlDbType.VarChar, 100, "vPayName");
            insertcommand.Parameters.Add("svRemarks", MySqlDbType.VarChar, 70, "vRemarks");
            insertcommand.Parameters.Add("svAmount", MySqlDbType.Double, 0, "vAmount");

            sqlDataMaster.InsertCommand = insertcommand;
            //===============================================================================
            //--- Set up the UPDATE Command
            //===============================================================================
            sUpdProcName = "prUpdate_Voucher";
            updatecommand = new MySqlCommand(sUpdProcName, oCn, oTrn);
            updatecommand.CommandType = CommandType.StoredProcedure;
            updatecommand.Parameters.Add("nNewID", MySqlDbType.Int32, 4, "vID");
            updatecommand.Parameters.Add("svTypeID", MySqlDbType.Int32, 0, "CustomerID");
            updatecommand.Parameters.Add("svNo", MySqlDbType.Int32, 0, "vNo");
            updatecommand.Parameters.Add("svaccCodeDR", MySqlDbType.VarChar, 12, "accCodeDR");
            updatecommand.Parameters.Add("svaccCodeCR", MySqlDbType.VarChar, 12, "accCodeCR");
            updatecommand.Parameters.Add("svDate", MySqlDbType.DateTime);
            updatecommand.Parameters["svDate"].SourceColumn = "vDate";
            updatecommand.Parameters.Add("svChqNo", MySqlDbType.Int32, 0, "vChqNo");
            updatecommand.Parameters.Add("svChqDt", MySqlDbType.Date);
            updatecommand.Parameters["svChqDt"].SourceColumn = "vChqDt";
            updatecommand.Parameters.Add("svPayName", MySqlDbType.VarChar, 100, "vPayName");
            updatecommand.Parameters.Add("svRemarks", MySqlDbType.VarChar, 70, "vRemarks");
            updatecommand.Parameters.Add("svAmount", MySqlDbType.Double, 0, "vAmount");
            sqlDataMaster.UpdateCommand = updatecommand;

           //===============================================================================
            //--- Set up the DELETE Command
            //===============================================================================
            sDelProcName = "prDelete_Voucher";
            deletecommand = new MySqlCommand(sDelProcName, oCn, oTrn);
            deletecommand.CommandType = CommandType.StoredProcedure;
            deletecommand.Parameters.Add("nNewID", MySqlDbType.Int32, 4, "vID");
            sqlDataMaster.DeleteCommand = deletecommand;

            sqlDataMaster.Update(oDs.Tables[0]);
            VoucherDetails vDet = new VoucherDetails();
            vDet.SaveVoucher(oTrn, oDs.Tables[1]);

            oTrn.Commit();
            MessageBox.Show("Records saved.", "Saving Records");

        }
        catch (MySqlException e)
        {
            //===============================================================================
            //--- Rollback the transaction
            //===============================================================================
            oTrn.Rollback();
            //MessageBox.Show(e.ToString());
            MessageBox.Show(e.Message +" Error code: "+ e.Number);
            oDs.Tables[0].Rows[0]["vNo"] = DBNull.Value;

        }

    }

使用参数化的 StoredProc 将数据保存在 MySql 数据库中，对于使用 StoredProc 之后的插入记录：

DELIMITER $$
USE `generalledger`$$

DROP PROCEDURE IF EXISTS `prInsert_Voucher`$$

CREATE DEFINER=`root`@`localhost` PROCEDURE `prInsert_Voucher`(
IN svTypeID INT, 
IN svNo INT, 
IN svaccCodeDR VARCHAR(12),
IN svaccCodeCR VARCHAR(12), 
IN svDate DATETIME,
IN svChqNo INT, 
IN svChqDt DATETIME, 
IN svPayName VARCHAR(100), 
IN svRemarks VARCHAR(70), 
IN svAmount DOUBLE,  
OUT nNewID INT)
BEGIN

INSERT INTO vMaster (vTypeID, vNo, accCodeDR,accCodeCR,vDate, vChqNo, vChqDt, vPayName, vRemarks, vAmount)
VALUES (svTypeID, svNo, svaccCodeDR, svaccCodeCR, svDate, svChqNo, svChqDt, svPayName, svRemarks, svAmount);
SET nNewID = LAST_INSERT_ID();
END$$

DELIMITER ;

问题： vChqDt 是 MySql DateTime 字段，我在 C# Winform 中使用 DateTimePicker 供用户到 select 日期。 svChqDt 是我在 SaveVoucher 程序中使用的参数，除了 vChqDt 之外的所有字段都已正确保存....它只会变成 NULL。我在这个论坛上搜索解决方案，发现使用 ToString 将日期格式更改为 yyyy-mm-dd 可以解决问题。但是问题是应该放在哪里呢？？

编辑：（原因=添加表单代码）

   public frmVoucher()
    {
        InitializeComponent();
        DoNewVoucher();
    }

    private void Form1_Load(object sender, EventArgs e)
    {

        txtVDt.Text = DateTime.Today.ToString();

    }

   public void DoNewVoucher()
    {
        vr.VoucherType = 1;
        ds = vr.NewVoucher();



        //Create New binding source for Order
        bs = new BindingSource();
        //Create New binding source for Order Details
        bsDet = new BindingSource();
        //Set Order binding source to Dataset ds
        bs.DataSource = ds;
        //Set Order Data Member to Dataset ds table "Orders"
        bs.DataMember = "vMaster";
        //Set Order Details binding source to Order's Binding Source
        bsDet.DataSource = bs;
        //Set Order Data Member to Dataset's Relationship for data integrity
        bsDet.DataMember = "VouchersToVoucherDetails";

        BindControls();



        bs.AddNew();
        txtVDt.Text = DateTime.Today.ToString();
     //   txtChqDt.Text = DateTime.Today.ToString();

    }

public void BindControls()
    {


        txtvTypeID.Text = null;
        txtVType.Text = null;
        txtVNum.Text = null;
        txtVDesc.Text = null;
        txtVDt.Text = null;
        if (vr.VoucherType == 1)
        {
            txtChqNo.Text = null;
            txtChqDt.Text = null;
            txtDrAcc.Text = null;
            txtDrAccDesc.Text = null;
            txtCrAcc.Text = null;
            txtCrAccDesc.Text = null;
            txtPayName.Text = null;
            txtAmount.Text = null;
        }


        txtRemarks.Text = null;


        txtTransID.DataBindings.Clear();
        txtvTypeID.DataBindings.Clear();
        txtVType.DataBindings.Clear();
        txtVNum.DataBindings.Clear();
        txtVDt.DataBindings.Clear();
        if (vr.VoucherType == 1)
        {
            txtChqNo.DataBindings.Clear();
            txtChqDt.DataBindings.Clear();
            txtDrAcc.DataBindings.Clear();
            txtCrAcc.DataBindings.Clear();
            txtPayName.DataBindings.Clear();
            txtAmount.DataBindings.Clear();
        }
        txtRemarks.DataBindings.Clear();



        txtTransID.DataBindings.Add(new Binding("Text", bs, "vID"));
        txtvTypeID.DataBindings.Add(new Binding("Text", bs, "vTypeID"));
        txtVNum.DataBindings.Add(new Binding("Text", bs, "vNo"));
        txtVDt.DataBindings.Add(new Binding("Text", bs, "vDate"));
        if (vr.VoucherType == 1)
        {
            txtChqNo.DataBindings.Add(new Binding("Text", bs, "vChqNo"));
            //string s = txtChqDt.Value.ToString("yyyy-MM-dd HH:mm");
            //DateTime dt = DateTime.ParseExact(txtChqDt.Text, "yyyy-MM-dd HH:mm", CultureInfo.InvariantCulture);
            txtChqDt.DataBindings.Add(new Binding("Text", bs, "vChqDt"));
            txtDrAcc.DataBindings.Add(new Binding("Text", bs, "accCodeDR"));
            txtCrAcc.DataBindings.Add(new Binding("Text", bs, "accCodeCR"));
            txtPayName.DataBindings.Add(new Binding("Text", bs, "vPayName"));
            txtAmount.DataBindings.Add(new Binding("Text", bs, "vAmount"));
        }
        txtRemarks.DataBindings.Add(new Binding("Text", bs, "vRemarks"));



        txtVDt.Text = DateTime.Today.ToString();
        if (vr.VoucherType == 1)
        {
            txtChqDt.Text = DateTime.Today.ToString();
        }


        if (txtvTypeID.Text == null || txtvTypeID.Text == string.Empty)
        {
            //txtVType.Text = dm.GetData("Select vType from vType Where vTypeID = '" + txtvTypeID.Text + "'").Rows[0]["vType"].ToString();
            txtVType.Text = null;
        }
        else
        {

            txtVType.Text = dm.GetData("Select vType from vType Where vTypeID = '" + txtvTypeID.Text + "'").Rows[0]["vType"].ToString();


        }

        dgVDet.AutoGenerateColumns = false;
        dgVDet.DataSource = bsDet;

        dgVDet.Columns["vDetID"].DataPropertyName = "vDetID";
        dgVDet.Columns["vID"].DataPropertyName = "vID";
        dgVDet.Columns["accCode"].DataPropertyName = "accCode";
        dgVDet.Columns["accName"].DataPropertyName = "accName";
        dgVDet.Columns["accDebit"].DataPropertyName = "accDebit";
        dgVDet.Columns["accCredit"].DataPropertyName = "accCredit";
        dgVDet.Columns["accRemarks"].DataPropertyName = "accRemarks";


        //CalculateTotals();


    }

private void btnSave_Click(object sender, EventArgs e)
    {
        int rowCount = 0;
        rowCount = dgVDet.Rows.Count - 1;




        this.Validate();
        bs.EndEdit();

        double dCr = 0;
        double dDr = 0;
        Double.TryParse(txtTotDR.Text.ToString(), out dDr);
        Double.TryParse(txtTotCR.Text.ToString(), out dCr);

        if (!ds.HasChanges())
        {

            MessageBox.Show("No changes to save.", "Saving Records");
            return;
        }

        if (dCr != dDr)
        {

            MessageBox.Show("Total of Debit and Credit are not equal.", "Saving Records");
            return;
        }


        try
        {


            if (txtvTypeID.Text == null || txtvTypeID.Text == string.Empty)
            {
                return;
            }
            else
            {
                if (txtVNum.Text == null || txtVNum.Text == string.Empty)
                {

                    int temp = int.Parse(this.txtvTypeID.Text.ToString());
                    ds.Tables[0].Rows[0]["vNo"] = vr.GetVoucherNum(temp);
                }

            }


            vr.SaveVoucher(ds);


        }


        catch (MySqlException err)
        {

           // MessageBox.Show(err.Message.ToString() +" "+ err.ErrorCode );
            MessageBox.Show(err.ErrorCode.ToString());

        }

        CellSum(5);
        CellSum(6);
    }

Answer 1

好的，伙计们，我让它工作了..只需要改变这个：

txtChqDt.DataBindings.Add(new Binding("Text", bs, "vChqDt"));

至

txtChqDt.DataBindings.Add(new Binding("Value", bs, "vChqDt", true));

谢谢

艾哈迈德

C# Datepicker 值未保存在 MySql 数据库中

C# Datepicker value not saved in MySql database

c#

mysql

datetimepicker