小编Nic*_*ole的帖子

我写的存储过程有问题。如果 select 语句不返回任何值，我希望该过程返回 -1。但是，当 select 语句返回结果时，我想返回@@rowCount.

当我运行存储过程时，它在没有结果时返回 -1，但在有结果时返回 1。

关于我需要改变什么的任何建议？

    -- Add the parameters for the stored procedure here
    @LoginName VARCHAR(25),
    @Password VARCHAR(10),
    @rowsAffected INT OUTPUT
AS
BEGIN
    SET NOCOUNT ON;

    DECLARE @PasswordSalt VARCHAR(36) 

    SELECT @PasswordSalt = (SELECT PasswordSalt FROM Employee WHERE LoginName = @LoginName)

    SELECT 
        Employee.ID, FirstName, LastName, LoginName, Email, StatusTypeID, 
        Description AS StatusDescription
    FROM
        Employee
    JOIN
        StatusType st ON Employee.StatusTypeID = st.ID
    WHERE
        LoginName = @LoginName 
        AND PasswordHash = HashBytes('SHA2_512', @Password + Cast(@PasswordSalt AS nvarchar(36))) 
        AND …

我正在使用OpenFile对话框打开一个文件,我想确认该文件是excel格式.

我打开的文件是"C:\ Desktop\Distribution.xls",但我的if语句的两个条件都评估为true.我应该使用另一种方法吗？

          DialogResult result = openFileDialog1.ShowDialog();

        if (result==DialogResult.OK)
        {
            file = openFileDialog1.FileName;
            file = file.Trim();

            if (!file.EndsWith(".xlsx")||!file.EndsWith(".xls"))
            {
                MessageBox.Show("Incorrect file format.  Please save file in an .xls format");
            }

            else
            {
                book = application.Workbooks.Open(file);
                sheet = (Worksheet)book.Worksheets[1];
                range = sheet.get_Range("A1", "A1".ToString());

                range.EntireRow.Delete(XlDirection.xlUp);

                sheet.Cells[1, 2].EntireColumn.NumberFormat = "@";

                book.SaveAs(csvConverstion, XlFileFormat.xlCSV);
                book.Close(false, Type.Missing, Type.Missing);
                application.Quit();

            }