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-- 作者:jswjyjf -- 发布时间:2021/3/28 9:25:00 -- 明明有数据 Dim cmd As New SQLCommand cmd.C cmd.CommandText ="Sele ct Count(*) From {kmk} Where len(\'科目科目\')=9" msgbox(cmd.ExecuteScalar) If cmd.ExecuteScalar > 0 Then Messagebox.Show("已经存在同名用户","提示",MessageBoxButtons.OK,MessageBoxIcon.Information) End If
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-- 作者:有点蓝 -- 发布时间:2021/3/28 21:00:00 -- Dim cmd As New SQLCommand cmd.C cmd.CommandText ="Sele ct Count(*) From {kmk} Where len(\'科目科目\')=9" dim a as integer = cmd.ExecuteScalar msgbox(a) If a > 0 Then Messagebox.Show("已经存在同名用户","提示",MessageBoxButtons.OK,MessageBoxIcon.Information) End If
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