SQL Server 2008 R2存储过程不起作用(visual c#)

我在过去一周左右搜索并尝试了不同的东西,我的问题可能是通过谷歌找到答案.

如果我在SQL Server Management Studio中执行此查询并将参数@zoekterm替换为’％something％’,它可以正常工作并返回我想要的结果.但是当我从C#调用相同的程序时,它什么也没有返回.

这是一个错误还是我那么愚蠢？

这是C#中存储过程和函数的代码,(我知道我应该使用switch case …)

存储过程：

-- =============================================
-- Author:      Daan
-- Create date: 
-- Description: 
-- =============================================
ALTER PROCEDURE [dbo].[quick_bedrijf] 
    -- Add the parameters for the stored procedure here
    @zoekterm varchar(100) = 0
AS
BEGIN
    -- SET NOCOUNT ON added to prevent extra result sets from
    -- interfering with SELECT statements.
    SET NOCOUNT ON;

    -- Insert statements for procedure here
    SELECT bedrijf.bedrijf_nr, bedrijf.zoeknaam, bedrijf.plaats
    FROM bedrijf
    WHERE zoeknaam LIKE @zoekterm AND NIETactief = 0

    ORDER BY bedrijf.zoeknaam, bedrijf.plaats 
END

C#：

private void snel_zoek2()
{
    listView1.Items.Clear();

    con.Open();
    if (type == 1)
    {
         command1 = new SqlCommand("quick_project", con);
         colnum = 5;
    }
    else if (type == 2)
    {
         command1 = new SqlCommand("quick_bedrijf", con);
         colnum = 3;
    }
    else if (type == 3)
    {
         command1 = new SqlCommand("quick_persoon", con);
         colnum = 4;
    }
    command1.CommandType = CommandType.StoredProcedure;
    SqlParameter zoekterm = command1.Parameters.Add("@zoekterm", SqlDbType.VarChar, 100);
    zoekterm.Direction = ParameterDirection.Input;
    //command1.Parameters.Add(new SqlParameter("@zoekterm", SqlDbType.VarChar)).Value = " '%zee%'";// + textBox2.Text.ToString()+
    zoekterm.Value = "'%"+textBox2.Text.ToString()+"%'";
    // MessageBox.Show(zoekterm.Value.ToString());
    SqlDataAdapter adapt = new SqlDataAdapter();
    DataTable dt = new DataTable();
    adapt.SelectCommand = command1;
    adapt.Fill(dt);
    dataGridView1.BindingContext = new BindingContext();
    dataGridView1.DataSource = dt;

    con.Close();
}

解决方法:

你不要把引号放在参数中(那些是表示文字);它应该是：

zoekterm.Value = "%"+textBox2.Text+"%";

它目前失败,因为如果文本是“abc”,它正在查找以单引号开头和结尾的字符串,并包含“abc”.在SQL术语中,您要求它：

LIKE '''%abc%'''

标签：c,stored-procedures,sql-server-2008-r2
来源： https://codeday.me/bug/20190621/1255996.html