C# WinForm 实现增删改查等功能(Access版) 系列之三-更新

更新一条记录模块设计与实现

设计：点击更新按钮弹出一个窗体(在这里是对dataGridView的一个双击事件)，在窗体的文本框中填充数据，点击更新按钮，当前修改数据窗体自动关闭，同时刷新主窗体，更新并显示数据。

实现：需要在增加按钮事件中传递一个字符串和一个主窗体的指针。

/// <summary>
/// 修改
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void 修改ToolStripMenuItem_Click(object sender, EventArgs e)
{
dataGridView1_DoubleClick(sender, e);//类似于dataGridView的更新操作，也就是双击操作
}

//右键选中行
//本方法来自CSDN博客，转载请标明出处：http://blog.csdn.net/yshjshxxn/archive/2009/06/26/4300927.aspx
private void dataGridView1_CellMouseDown(object sender, DataGridViewCellMouseEventArgs e)
{
//判断如果点击的是鼠标右键
if (e.Button == MouseButtons.Right)
{
//判断鼠标点击在数据行上
if (e.RowIndex >= 0)
{
dataGridView1.ClearSelection();
dataGridView1.Rows[e.RowIndex].Selected = true;
dataGridView1.CurrentCell = dataGridView1.Rows[e.RowIndex].Cells[e.ColumnIndex];
}
}
}

/// <summary>
/// dataGridview1双击事件,获得某行的信息
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void dataGridView1_DoubleClick(object sender, EventArgs e)
{
//selectedRowsButton_Click(sender, e);
Int32 selectedRowCount = dataGridView1.Rows.GetRowCount(DataGridViewElementStates.Selected);
if (selectedRowCount > 0)
{
String str = string.Empty;
for (int i = 0; i < selectedRowCount; i++)
{
int selectedRow = dataGridView1.SelectedRows[i].Index; //获得选中的某行
int columns = dataGridView1.ColumnCount;
for (int j = 0; j < columns; j++)
{
str += dataGridView1.Rows[selectedRow].Cells[j].Value.ToString() + ",";
}
}
ResumeAddOrUpdate resumeAdd = new ResumeAddOrUpdate(str,this);
resumeAdd.SaveOrUpdate("Update");
resumeAdd.Width = this.Width; //设置宽度,高度
resumeAdd.Height = this.Height;
resumeAdd.Top = this.Top;
resumeAdd.Left = this.Left;
resumeAdd.StartPosition = FormStartPosition.CenterScreen;
resumeAdd.BackColor = Color.White;
resumeAdd.Show();
// MessageBox.Show(str.ToString(), "Selected Rows");
}
}

ResumeAddOrUpdate窗体实现：
/// <summary>
/// 增加Or更新
/// </summary>
/// <param name="str"></param>
public void SaveOrUpdate(string str)
{
if (str.ToLower().Equals("save"))
{
btnSave.Visible = true;
btnUpdate.Visible = false;
}else if(str.ToLower().Equals("update")){
btnSave.Visible = false;
btnUpdate.Visible = true;
txtName.Enabled = false;
}
}

/// <summary>
/// 更新时的操作
/// 两个参数的构造函数
/// 传递一个父窗体
/// </summary>
/// <param name="str"></param>
/// <param name="_resumeTest"></param>
public ResumeAddOrUpdate(string str,ResumeTest _resumeTest) //这里需要从父窗体中传递一个this指针
{
InitializeComponent();
this.resumeTest = _resumeTest;
timeStamp = 0;//初始化参数
lblImage.Text = "0";//初始化是否更新图片，为空时不更新图片，不为空时则更新图片
string[] content = str.Split(',');
txtName.Text = content[0]; //姓名
if (content[1].Equals("男"))
{
rbtnMale.Checked = true;
}
else if (content[1].Equals("女"))
{
rbtnFemale.Checked = true;
}
dateTimePicker1.Text = content[2].ToString();
txtYear.Text = content[3].ToString();
txtCardStyle.Text = content[4].ToString();
txtCardNumber.Text = content[5].ToString();
txtAddress.Text = content[6].ToString();
txtEmail.Text = content[7].ToString();
txtPhoneNumber.Text = content[8].ToString();
txtHomeNumber.Text = content[9].ToString();
txtSelfCommand.Text = content[10].ToString();
string strPictrueBox = getStrOfPictureBox(txtName.Text.Trim()); //根据数据库中生成的图片路径，显示图片
//MessageBox.Show(strPictrueBox, "提示");

if (strPictrueBox.Contains("nophoto.jpg"))
{
lblImage.Text = "0"; //给图片路径字符串赋值
picPerson.Image = Image.FromFile(Application.StartupPath + "//Image//nophoto.jpg");
}
else
{
lblImage.Text = strPictrueBox; //给图片路径字符串赋值

picPerson.Image = Image.FromFile(Application.StartupPath + "//Image//" + strPictrueBox + ".jpg");
}
}

/// <summary>
/// 修改操作
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void btnUpdate_Click(object sender, EventArgs e)
{

//手动代码保存数据至数据库
OleDbConnection conn = GetConnection();
string sqlText = "Update MResume set 性别=@sex,出生日期=@datetimes,工作年限=@years,证件类型=@cardStyle,证件号=@cardNumber,居住地=@address,Email=@email,手机号码=@phoneNumber,家庭电话=@homeNumber,自我评价=@selftCommand,图片=@timeStamp where 姓名=@name";
// OleDbTransaction transaction = null;
OleDbCommand cmd = new OleDbCommand(sqlText, conn);
// transaction = conn.BeginTransaction();
// cmd.Transaction = transaction;
cmd.Parameters.AddWithValue("@sex", sex);
cmd.Parameters.AddWithValue("@datetimes", datetimes);
cmd.Parameters.AddWithValue("@years", years);
cmd.Parameters.AddWithValue("@cardStyle", cardStyle);
cmd.Parameters.AddWithValue("@cardNumber", cardNumber);
cmd.Parameters.AddWithValue("@address", address);
cmd.Parameters.AddWithValue("@email", email);
cmd.Parameters.AddWithValue("@phoneNumber", phoneNumber);
cmd.Parameters.AddWithValue("@homeNumber", homeNumber);
cmd.Parameters.AddWithValue("@selftCommand", selftCommand);
cmd.Parameters.AddWithValue("@timeStamp", lblImage.Text);
cmd.Parameters.AddWithValue("@name", name);
try
{
conn.Open();
int i = cmd.ExecuteNonQuery();
MessageBox.Show("更新成功！", "提示");
this.resumeTest.RefreshDataGridView(sender,e); //刷新窗体
this.Close();
}
catch (Exception ex)
{
MessageBox.Show("异常：" + ex.ToString(),"提示");
}
finally
{
conn.Close();
}
}