我想显示一个带有Compte Name的DataGridView以及每月和每年的Recette和Depense的总和。 我有一个月份定制的DateTimePicker。Image of the Winforms and the error
示例：如果我选择date = 11/2015（2015年11月），它将显示为
Compte Total
BTK 633,000
Biat 987,888
Caisse 988,875
如果我选择date = 06/2016（2016年6月），它将显示为
Compte Total
BTK 0
Biat 653,256
Caisse 88,145
我的代码：
public partial class ComptesMois : Form
{
SqlConnection conn;
SqlCommand comm;
SqlDataReader dreader;
string connstring = "Data Source=.;Initial Catalog=Tresorerie;Integrated Security=True";
public ComptesMois()
{
InitializeComponent();
//Set Columns Count
DataGridViewCompteMois.ColumnCount = 2;
//Hide the last blank line
DataGridViewCompteMois.AllowUserToAddRows = false;
//Add Columns
DataGridViewCompteMois.Columns[0].Name = "NomCom";
DataGridViewCompteMois.Columns[0].HeaderText = "Nom de Compte";
DataGridViewCompteMois.Columns[0].DataPropertyName = "NomCom";
DataGridViewCompteMois.Columns[0].Width = 100;
//Add Columns
DataGridViewCompteMois.Columns[1].Name = "Total";
DataGridViewCompteMois.Columns[1].HeaderText = "Total";
DataGridViewCompteMois.Columns[1].DataPropertyName = "Total";
DataGridViewCompteMois.Columns[1].Width = 100;
this.BindGrid();
CompteMoisdateTimePicker.Format = DateTimePickerFormat.Custom;
CompteMoisdateTimePicker.CustomFormat = "MM yyyy";
//CompteMoisdateTimePicker.ShowUpDown = true; // to prevent the calendar from being displayed
}
private void BindGrid()
{
DataGridViewCompteMois.DataSource = null;
using (SqlConnection con = new SqlConnection(connstring))
{
using (SqlCommand cmd = new SqlCommand("select DISTINCT c.NomCom from Tresorerie t join Compte c on t.IdCom=c.IdCom", con))
{
cmd.CommandType = CommandType.Text;
using (SqlDataAdapter sda = new SqlDataAdapter(cmd))
{
using (DataTable dt = new DataTable())
{
sda.Fill(dt);
DataGridViewCompteMois.DataSource = dt;
}
}
}
}
}
private void DataGridViewCompteMois_CellContentClick(object sender, DataGridViewCellEventArgs e)
{
string month = CompteMoisdateTimePicker.Value.Month.ToString();
string year = CompteMoisdateTimePicker.Value.Year.ToString();
//select * from < table > where month(searchDate) = Month_from_box and Year(searchDate) = Year_from_box
// select sum(recette + depence) from Tresorerie where
String total;
for (int i = 0; i < DataGridViewCompteMois.Rows.Count; i++)
{
conn = new SqlConnection(connstring);
conn.Open();
String NomCompteDataGrid = Convert.ToString(DataGridViewCompteMois.Rows[i].Cells[0].Value);
String IdCompteValue = "select IdCom from Compte where NomCom='" + NomCompteDataGrid + "'";
comm = new SqlCommand(IdCompteValue, conn);
int IdComValue = Convert.ToInt32(comm.ExecuteScalar());
conn.Close();
using (SqlConnection con = new SqlConnection(connstring))
{
using (SqlCommand cmd = new SqlCommand("select sum(Recette + Depense) as Total from Tresorerie where IdCom=@IdCom GROUP BY Recette,Depense", con))
{
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("@IdCom", IdComValue);
con.Open();
total = Convert.ToString(cmd.ExecuteNonQuery());
con.Close();
}
}
DataGridViewCompteMois.Rows[i].Cells[1].Value = total;
}
}
}
但是有一个错误，结果显示每个Compte
的-1更新1：感谢@Soner_Gönül，我修改了查询语句，并且我在sql上测试了它并且它可以工作，但是当我将结果添加到网格单元格时，它显示为空，但我尝试显示它与messgae盒子一起工作，我的代码：
String total;
private void CompteMoisdateTimePicker_ValueChanged(object sender, EventArgs e)
{
string month = CompteMoisdateTimePicker.Value.Month.ToString();
string year = CompteMoisdateTimePicker.Value.Year.ToString();
for (int i = 0; i < DataGridViewCompteMois.Rows.Count; i++)
{
conn = new SqlConnection(connstring);
conn.Open();
String NomCompteDataGrid = Convert.ToString(DataGridViewCompteMois.Rows[i].Cells[0].Value);
String IdCompteValue = "select IdCom from Compte where NomCom='" + NomCompteDataGrid + "'";
comm = new SqlCommand(IdCompteValue, conn);
int IdComValue = Convert.ToInt32(comm.ExecuteScalar());
conn.Close();
using (SqlConnection con = new SqlConnection(connstring))
{
using (SqlCommand cmd = new SqlCommand("select SUM( Depense + Recette ) from Tresorerie where IdCom=@IdCom and MONTH(DateTre) = @MONTH AND YEAR(DateTre) = @YEAR GROUP BY IdCom", con))
{
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("@IdCom", IdComValue);
cmd.Parameters.AddWithValue("@MONTH", month);
cmd.Parameters.AddWithValue("@YEAR", year);
con.Open();
total = Convert.ToString(cmd.ExecuteScalar());
con.Close();
}
}
DataGridViewCompteMois.Rows[i].Cells["Total"].Value = total;
//MessageBox.Show(total.ToString());
}
}
更新解决方案：看我选择了哪个单元格有问题，此代码有效
private void CompteMoisdateTimePicker_ValueChanged(object sender, EventArgs e)
{
string month = CompteMoisdateTimePicker.Value.Month.ToString();
string year = CompteMoisdateTimePicker.Value.Year.ToString();
for (int i = 0; i < DataGridViewCompteMois.Rows.Count; i++)
{
conn = new SqlConnection(connstring);
conn.Open();
String NomCompteDataGrid = Convert.ToString(DataGridViewCompteMois.Rows[i].Cells[1].Value);
String IdCompteValue = "select IdCom from Compte where NomCom='" + NomCompteDataGrid + "'";
comm = new SqlCommand(IdCompteValue, conn);
int IdComValue = Convert.ToInt32(comm.ExecuteScalar());
conn.Close();
using (SqlConnection con = new SqlConnection(connstring))
{
using (SqlCommand cmd = new SqlCommand("select SUM( Depense + Recette ) from Tresorerie where IdCom=@IdCom and MONTH(DateTre) = @MONTH AND YEAR(DateTre) = @YEAR GROUP BY IdCom", con))
{
cmd.CommandType = CommandType.Text;
cmd.Parameters.AddWithValue("@IdCom", IdComValue);
cmd.Parameters.AddWithValue("@MONTH", month);
cmd.Parameters.AddWithValue("@YEAR", year);
con.Open();
//MessageBox.Show(Convert.ToString(cmd.ExecuteScalar()));
DataGridViewCompteMois.Rows[i].Cells["Total"].Value = Convert.ToString(cmd.ExecuteScalar());
con.Close();
}
}
}
}
答案 0 :(得分：0)
我认为问题是ExecuteNonQuery使用SELECT语句，因为;
对于UPDATE，INSERT和DELETE语句，返回值为 受命令影响的行数。当a上存在触发器时 正在插入或更新的表，返回值包括数字 受插入或更新操作影响的行数和数字 受触发器或触发器影响的行数。 适用于所有其他类型的 语句，返回值为-1 。
您似乎还需要使用ExecuteScalar来获取Recette + Depense列的总数。