Question

这是我的grideview代码：

我需要为此代码使用if语句：private const string select_query 需要向管理员显示第一个代码，向stockcontroller显示第二个代码。我试图在最后"UserID"只隐藏一列。我不知道如何调用它并使用if语句签署给不同的用户。刚试了一下!!!

这是我的库存网格视图代码：

SqlCommand selectCommand = new SqlCommand(" Select * from New_User where User_Name=@USER_ID", conn);
selectCommand.Parameters.Add(new SqlParameter("USER_ID", txtusername.Text.ToString());               

string UserType = null;
SqlDataReader reader = selectCommand.ExecuteReader();
bool rowfound = reader.HasRows;
if (rowfound)
{
    while (reader.Read())
    {
        UserType = reader["User_Type"].ToString().Trim();

        if (UserType == "Administrator")
        {
            GlobalVariablesClass.VariableOne = txtusername.Text;

            private const string select_query = "SELECT TOP 3 id,stock_type,stock_no,no_of_pieces,Gem_Type,Weight,Image,Cost,Create_Date,Update_Date,UserID FROM Stock_Gems";

        }
        else if (UserType == "StockController")

        {
            GlobalVariablesClass.VariableOne = txtusername.Text;
            private const string select_query = "SELECT TOP 3 id,stock_type,stock_no,no_of_pieces,Gem_Type,Weight,Image,Cost,Create_Date,Update_Date FROM Stock_Gems";
        }
    }
}

这是我的登录代码：

private void tbnlogin_Click(object sender, EventArgs e)
{
    try
    {
        SqlCommand selectCommand = new SqlCommand(" Select * from New_User where User_Name=@USER_ID and Password=@PASS", conn);
        selectCommand.Parameters.Add(new SqlParameter("USER_ID", txtusername.Text.ToString()));
        String password = "";

        using (SHA1 sha1 = SHA1.Create())
        {
            byte[] data = sha1.ComputeHash(Encoding.UTF8.GetBytes(txtpassword.Text));
            StringBuilder sb = new StringBuilder();
            for (int i = 0; i < data.Length; ++i)
            {
                sb.Append(data[i].ToString("x2"));
            }

            password = sb.ToString();
        }

        selectCommand.Parameters.Add(new SqlParameter("PASS", password));
        string UserType = null;
        SqlDataReader reader = selectCommand.ExecuteReader();
        bool rowfound = reader.HasRows;
        if (rowfound)
        {
            while (reader.Read())
            {
                UserType = reader["User_Type"].ToString().Trim();
                if (UserType == "Administrator")
                {
                    GlobalVariablesClass.VariableOne = txtusername.Text;
                    MessageBox.Show("Welcome ", "Admin Login", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    Admin_Menu frm = new Admin_Menu();
                    frm.bunifuFlatButton3.Visible = true;
                    frm.Show();
                    this.Hide();
                }
                else if (UserType == "StockController")
                {
                    GlobalVariablesClass.VariableOne = txtusername.Text;
                    MessageBox.Show("Welcome ", "User Login", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    Admin_Menu frm = new Admin_Menu();
                    frm.bunifuFlatButton3.Visible = false;
                    frm.Show();                         
                    this.Hide();
                }
            }

            }

        else
        {
            MessageBox.Show(" Invalid User Or Password ", "Login ", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
        reader.Close();
    }
}

我有一个带有项目列的网格视图，如下所示：

ID|Stock_Type|Stock_No|No_of_pieces|Gem_Type|Weight|Image|Cost|Create_Date|Update_date|UserID|

我发现了这个，但我不知道如何从数据库中检索。

这被编入库存gridview加载器

DisplayData();
hello.Text = GlobalVariablesClass.VariableOne;

if (Roles.IsUserInRole("Administrator"))
{
    this.dataGridView1.Columns[10].Visible = true;
}
else
{
    this.dataGridView1.Columns[10].Visible = false;
}

**我使用了全局变体，这意味着登录的用户名将出现在所有页面上。

隐藏“Stockcontroller”的网格视图中的列，并使其显示为“Administrator”

0 个答案: