private void trvEx1_AfterSelect(object sender, TreeViewEventArgs e)
{
var @class = e.Node.Tag as T_Class;
if (@class == null)
{
return;
}
//保存状态，用于在异常中恢复状态
int temp1 = classID;
classID = @class.ClassID;
//临时保存curIndex页，保证我们的SQL语句在执行报错的情况下，恢复curIndex状态
int temp2 = curIndex;
//重置curIndex=1;(因为页面重新加载了)
ResetCurIndexAndClassID(1, classID);
T_StudentDal dal = new T_StudentDal();
try
{
var res = dal.LoadStudents(curIndex, dataLength, classID);
dataGridView1.DataSource = res;
}
catch
{
ResetCurIndexAndClassID(temp2, temp1);
}
}
//更新数据
private void Click_OpenUpdateDataInforamtion(object sender, EventArgs e)
{
//首先检查当前是否已选中DataGridView中的一行
//选中:则将其数据提取到弹窗中
//未选中:提示弹窗需要先进行选取一行
var rows = dataGridView1.SelectedRows;
//无论用户选择多少行，每次都只获取用户选择的行中的第一行
if (rows.Count == 0)
{
FrmDialog.ShowDialog(this, "您必须选择一行数据", "提示");
return;
}
//获取所选中第一行所绑定的数据对象
var row = rows[0];
var t_Student = row.DataBoundItem as T_Student;
if (t_Student == null)
{
return;
}
FrmStudentManaChildModifyData childUpdate = new FrmStudentManaChildModifyData(t_Student);
childUpdate.ShowDialog();
curIndex = 1;
classID = t_Student.ClassID;
T_StudentDal dal = new T_StudentDal();
dataGridView1.DataSource = dal.LoadStudents(curIndex, dataLength, classID);
}
//删除数据
private void Click_DeleteDataInforamtion(object sender, EventArgs e)
{
//选中一行数据删除即可
//首先检查当前是否已选中DataGridView中的一行
//选中:则将其数据提取到弹窗中
//未选中:提示弹窗需要先进行选取一行
var rows = dataGridView1.SelectedRows;
//无论用户选择多少行，每次都只获取用户选择的行中的第一行
if (rows.Count == 0)
{
FrmDialog.ShowDialog(this, "您必须选择一行数据", "提示");
return;
}
//获取所选中第一行所绑定的数据对象
var row = rows[0];
var t_Student = row.DataBoundItem as T_Student;
if (t_Student == null)
{
return;
}
string t_sql = "DeleteIntoStudentBasicInformation";
SqlParameter par = new SqlParameter("@StuID", SqlDbType.Int)
{
Value = t_Student.StuID
};
T_StudentDal dal = new T_StudentDal();
try
{
var res = (int)dal.ExecuteScalar(t_sql, CommandType.StoredProcedure, par);
if (res == 1)
{
curIndex = 1;
dataGridView1.DataSource = dal.LoadStudents(curIndex, dataLength, classID);
FrmDialog.ShowDialog(this, "删除成功", "提示");
}
else
{
throw new Exception();
}
}
catch (Exception ex)
{
FrmDialog.ShowDialog(this, "删除失败", "提示");
}
}
//插入数据
private void Click_OpenInsertDataInforamtion(object sender, EventArgs e)
{
//进行插入数据的操作
//打开多输入窗口
FrmInputs input = new FrmInputs("插入学生数据", new string[] { "学号", "姓名", "出生年月", "性别", "班级编号" }, new Dictionary <string, HZH_Controls.TextInputType>()
{
{ "学号", HZH_Controls.TextInputType.Regex }, { "性别", HZH_Controls.TextInputType.Regex }, { "班级编号", HZH_Controls.TextInputType.Regex }
},
new Dictionary <string, string>()
{
{ "学号", @"^\d+$" }, { "性别", @"^[\u4e00-\u9fa5]{1}$" }, { "班级编号", @"^\d+$" }
});
input.ShowDialog();
var values = input.Values;
//确保所有数据已输入
foreach (var item in values)
{
if (item == null || item.Trim() == string.Empty)
{
return;
}
}
//必须判断日期输入是否正确
int sex = values[3] == "男" ? 1 : 0;
var res = Regex.IsMatch(values[2], @"^(?!0000)[0-9]{4}-((0{0,1}[1-9]|1[0-2])-(0{0,1}[1-9]|1[0-9]|2[0-8])|(0{0,1}[13-9]|1[0-2])-(29|30)|(0{0,1}[13578]|1[02])-31)$");
if (res == false)
{
return;
}
//插入数据存储过程
string t_sql = "InserIntoStudentBasicInformation";
SqlParameter[] pars = new SqlParameter[] {
new SqlParameter("@StuID", SqlDbType.Int)
{
Value = values[0]
},
new SqlParameter("@StuName", SqlDbType.VarChar, 20)
{
Value = values[1]
},
new SqlParameter("@StuBirthday", SqlDbType.Date)
{
Value = values[2]
},
new SqlParameter("@StuSex", SqlDbType.BigInt)
{
Value = sex
},
new SqlParameter("@ClassID", SqlDbType.Int)
{
Value = values[4]
}
};
T_StudentDal dal = new T_StudentDal();
//调用 Dal
try
{
int resVal = (int)dal.ExecuteScalar(t_sql, CommandType.StoredProcedure, pars);
if (resVal == 1)
{
curIndex = 1;
classID = int.Parse(values[4]);
dataGridView1.DataSource = dal.LoadStudents(curIndex, dataLength, classID);
FrmDialog.ShowDialog(this, "保存成功", "提示");
}
else
{
throw new Exception("保存失败");
}
}
catch (Exception ex)
{
FrmDialog.ShowDialog(this, "保存失败,请检查您输入的学号、班级编号输入正确", "提示");
}
}