WinForm笔记
企业员工管理系统
winForm
DB.cs
类文件：
public static SqlConnection createCon()
{ return new SqlConnection("server=.;uid=sa;pwd=;database=EmployeeManagment"); }
主窗体部分代码：
（
main
menu控件）
private void menuItem2_Click(object sender, System.EventArgs e)
{ ViewInfo vi=new ViewInfo();
vi.MdiParent=this;
vi.Show(); }
点击查看员工信息菜单窗体部分代码：（
listView、dataGrid控件）
private void ViewInfo_Load(object sender, System.EventArgs e)
{ //初始显示全部数据
con=DB.createCon();
ds=new DataSet();
sda=new SqlDataAdapter("select Emp_Name,Emp_Birthday,Emp_Gender,Emp_Remark from Employee",con);
sda.Fill(ds,"Employee");
this.dataGrid1.DataSource=ds.Tables["Employee"];
//ListView绑定数据
SqlDataReader dr=null;
ListViewItem item;
cmd=new SqlCommand("select Dep_Name from DepartMent",con);
con.Open();
dr=cmd.ExecuteReader();
while(dr.Read())
{ item=new ListViewItem();
item.Text=dr.GetValue(0).ToString();
this.listView1.Items.Add(item);
} dr.Close();
}
private void listView1_ItemActivate(object sender, System.EventArgs e)
{//点击部门名称,显示相应部门信息
string Dep_Name=this.listView1.SelectedItems[0].Text;
string DepID=null;
if(Dep_Name=="技术部") { DepID="1"; }
if(Dep_Name=="市场部") { DepID="2"; }
if(Dep_Name=="人事部") { DepID="3"; }
sda=new SqlDataAdapter("select Emp_Name,Emp_Birthday,Emp_Gender,Emp_Remark from Employee where Emp_DepID="+Convert.ToInt32(DepID),con);
ds=new DataSet();
sda.Fill(ds,"Employee");
this.dataGrid1.DataSource=ds.Tables["Employee"];
}
添加信息窗体
（radioButton、comboBox控件）：
1、添加：
private void btnSubmit_Click(object sender, System.EventArgs e)
{ int EmployeeID=Convert.ToInt32(this.textBox1.Text.Trim());
string Emp_Name=this.textBox2.Text.Trim();
string Emp_Birthday=this.textBox3.Text.Trim();
string Dep_Name=this.comboBox1.SelectedItem.ToString();
int Emp_DepID=0;
switch(Dep_Name)
{ case "技术部": Emp_DepID=1; break;
case "市场部": Emp_DepID=2; break;
case "人事部": Emp_DepID=3; break; default: break;
}
string Emp_Gender;
if(this.radioButton1.Checked)
{ Emp_Gender=this.radioButton1.Text; }
else { Emp_Gender=this.radioButton2.Text; }
string Emp_Remark=this.textBox4.Text.Trim();
SqlConnection con=DB.createCon();
SqlCommand cmd=new SqlCommand("insert into Employee values('"+EmployeeID+"','"+Emp_Name+"','"+Convert.ToDateTime(Emp_Birthday)+"','"+Emp_DepID+"','"+Emp_Gender+"','"+Emp_Remark+"')",con);
cmd.Connection.Open();
cmd.ExecuteNonQuery();
cmd.Connection.Close();
MessageBox.Show("添加成功！");
}
}
2、添加（用参数实现）：
private void btnSubmit_Click(object sender, System.EventArgs e)
{ string Dep_Name=this.cmbDept.SelectedItem.ToString();
int Emp_DepID=0;
if(Dep_Name=="技术部") { Emp_DepID=1; }
if(Dep_Name=="市场部") { Emp_DepID=2; }
if(Dep_Name=="人事部") { Emp_DepID=3; }
string Emp_Gender;
if(this.radioButton1.Checked)
{ Emp_Gender="男"; }
else
{ Emp_Gender="女"; }
SqlConnection con=DB.createCon();
SqlCommand cmd=new SqlCommand("insert into Employee(EmployeeID,Emp_Name,Emp_Birthday,Emp_DepID,Emp_Gender,Emp_Remark) values(@EmployeeID,@Emp_Name,@Emp_Birthday,@Emp_DepID,@Emp_Gender,@Emp_Remark)",con);
cmd.Parameters.Add(new SqlParameter("@EmployeeID",SqlDbType.Int,4));
cmd.Parameters["@EmployeeID"].Value=this.txtID.Text;
略--
cmd.Parameters.Add(new SqlParameter("@Emp_DepID",SqlDbType.Int,4));
cmd.Parameters["@Emp_DepID"].Value=Emp_DepID;
cmd.Parameters.Add(new SqlParameter("@Emp_Gender",SqlDbType.Char,10));
cmd.Parameters["@Emp_Gender"].Value=Emp_Gender;
cmd.Parameters.Add(new SqlParameter("@Emp_Remark",SqlDbType.VarChar,256));
cmd.Parameters["@Emp_Remark"].Value=this.txtRemark.Text;
cmd.Connection.Open();
cmd.ExecuteNonQuery();
cmd.Connection.Close();
} }
娱乐信息管理系统
获取toolBar控件中的一个值，显示相应窗体：
private void toolBar1_ButtonClick(object sender, System.Windows.Forms.ToolBarButtonClickEventArgs e)
{ if(this.toolBar1.Buttons.IndexOf(e.Button)==0)
{ AllInfo a=new AllInfo();
a.MdiParent=this;
a.Show();
}
}
删除选中的记录
private void dataGrid1_CurrentCellChanged(object sender, System.EventArgs e)
{ if(MessageBox.Show("你确定要删除这条记录吗？","用户您好",MessageBoxButtons.OKCancel,MessageBoxIcon.Exclamation)==DialogResult.OK)
{ int i = this.dataGrid1.CurrentCell.RowNumber;
string str = this.dataGrid1[i,0].ToString();
con=DB.createCon();
cmd=new SqlCommand("delete musicTable where MusicID='"+str+"'",conn);
cmd.Connection.Open();
cmd.ExecuteNonQuery();
cmd.Connection.Close();
MessageBox.Show("删除成功!");
this.allTable(); //调用方法,重新填充
}
}
更新：
private
void button3_Click(object sender, System.EventArgs e) //更新
{ string str="update musicTable set MusicName='"+textBox2.Text.Trim()+"',AuthorName='"+textBox3.Text.Trim()+"',PublishTime='"+textBox4.Text.Trim()+"' where MusicID=1";
cmd=new SqlCommand(str,con);
cmd.Connection.Open();
cmd.ExecuteNonQuery();
cmd.Connection.Close();
MessageBox.Show("更新成功!");
}
用文件框绑绑定数据,浏览信息
private
void MusicType_Load(object sender, System.EventArgs e)
{ con=DB.createCon();
da=new SqlDataAdapter("select * from musicTable where FormatID=1",con);
ds=new DataSet();
da.Fill(ds,"musicTable");
this.txtID.DataBindings.Add("Text",ds,"musicTable.MusicID");
this.txtName.DataBindings.Add("Text",ds,"musicTable.MusicName");
this.txtPerson.DataBindings.Add("Text",ds,"musicTable.AuthorName");
this.txtTime.DataBindings.Add("Text",ds,"musicTable.PublishTime");
con.Close();
}
用组合框绑绑定一列数据：
comboBox1.DataSource = ds.Tables["Login"];
comboBox1.DisplayMember = "Username";
浏览记录：
后移按钮： this.BindingContext[ds,"musicTable"].Position=this.BindingContext[ds,"musicTable"].Position+1;
------=0为移到最前
移到最后：
this.BindingContext[ds,"musicTable"].Position=this.ds.Tables["musicTable"].Rows.Count-1;
查询： 1、
string sql="select title,type,price,notes,pubdate from titles where title like '%"+strtitle+"%'";
2、
//查询
private void btnQuery_Click(object sender, System.EventArgs e)
{ string c=""; //定义搜索字段
if(this.txtName.Text=="") //如果此文本框为空,则显示所有数据,可省略此段
{ c="CustomerName like '%'"; }
else
{ c+="CustomerName like '%"+this.txtName.Text+"%'"; }
if(this.txtAddress.Text!="")
{ c+=" and Address like '%"+this.txtAddress.Text+"%'"; }
if(this.DropDownList1.SelectedValue.ToString()!="") //DropDownList的查询字段
{ int CustomerTypeID=0;
string CustomerTypeName=this.DropDownList1.SelectedValue.ToString();
if(CustomerTypeName=="高级会员")
{ CustomerTypeID=1;
c+=" and CustomerTypeName='高级会员'";
}
}
con=DB.createCon();
sda=new SqlDataAdapter();
sda.SelectCommand=new SqlCommand("select CustomerID,CustomerName,Address,WebsiteName,Website,CustomerTypeName from CustomerList AS a JOIN DIM_CustomerType AS b ON a.CustomerTypeID=b.CustomerTypeID",con);
ds=new DataSet();
sda.Fill(ds,"CustomerList");
DataView dv=new DataView(ds.Tables["CustomerList"]);
dv.RowFilter=c;
this.DataGrid1.DataSource=dv;
this.DataGrid1.DataBind(); }