Question

我有这个分配功能，管理员可以将警察ID分配给选定的memberreportID。首先，管理员将选择案例，选择位置并选择此案例所需的人员数量。例如，如果管理员选择了2名官员，则会显示2个下拉列表，所有绑定列表都列出了可用的policeID。

protected void ddllocation_SelectedIndexChanged(object sender, EventArgs e)
    {

        using (var connAdd = new SqlConnection("Data Source = localhost; Initial Catalog = MajorProject; Integrated Security= SSPI"))
        {
            connAdd.Open();

            var sql = "Select policeid from PoliceAccount where status ='available' and handle ='offcase' and postedto='" + ddllocation.SelectedValue + "'";
            using (var cmdAdd = new SqlDataAdapter(sql, connAdd))
            {
                DataSet ds2 = new DataSet();
                cmdAdd.Fill(ds2);

                ddlpid1.Items.Clear();
                ddlpid1.DataSource = ds2;
                ddlpid1.DataTextField = "policeid";
                ddlpid1.DataValueField = "policeid";
                ddlpid1.DataBind();
                ddlpid1.Items.Insert(0, new ListItem("Police ID", ""));
                ddlpid1.SelectedIndex = 0;

                ddlpid2.Items.Clear();
                ddlpid2.DataSource = ds2;
                ddlpid2.DataTextField = "policeid";
                ddlpid2.DataValueField = "policeid";
                ddlpid2.DataBind();
                ddlpid2.Items.Insert(0, new ListItem("Police ID", ""));
                ddlpid2.SelectedIndex = 0;

        }
    }

第一个SQL命令是我如何将它们插入到我的数据库中所选memberreportID的assignto列中。我正在插入两个我已分配到同一列的警察ID，assignto。

protected void btnAssign_Click1(object sender, EventArgs e)
    {


        using (var connAdd = new SqlConnection("Data Source = localhost; Initial Catalog = MajorProject; Integrated Security= SSPI"))
        {

            String assign = ddlpid1.SelectedValue + ", " + ddlpid2.SelectedValue + ";

            connAdd.Open();
            var sql = "Update MemberReport Set assignto ='" + assign + "' where memberreportID='" + lbmemberreportid.Text + "'";
            using (var cmdAdd = new SqlCommand(sql, connAdd))
            {
                cmdAdd.ExecuteNonQuery();

            }

            sql = "Update PoliceAccount Set handle ='" + assign + "' where policeid ='" + ddlpid1.SelectedValue + "' OR '" + ddlpid2.SelectedValue + "'";
            using (var cmdAdd = new SqlCommand(sql, connAdd))
            {
                cmdAdd.ExecuteNonQuery();
            }
            connAdd.Close();
        }


    }

但是我也试图通过包含第二个sql命令将这个policeID输入到名为policeaccount的表中。这个policeaccount有一个名为handle的列，用于显示他正在处理的memberreportID。我试图让每个policeID的帐户使用OR函数将选定的memberreportID接收到其句柄列中。我很确定sql语法有一个OR函数。但是当我试图插入时我得到了这个错误

An expression of non-boolean type specified in a context where a condition is expected, near ''.

Answer 1

应该如下

  sql = "Update PoliceAccount Set handle ='" + assign + "' where policeid ='" + ddlpid1.SelectedValue + "' OR  policeid = '" + ddlpid2.SelectedValue + "'";

语法是

UPDATE tblName Set col1 ='value'
WHERE col2 ='value2' 
        OR col2 ='value3'

将多个值从一个列属性插入另一个列属性

1 个答案: