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如何执行SQL语句?

我是编程的新手,大部分都是自学的.希望有人能就这些代码给我建议.

基本上,我遇到的问题是我的SQL语句没有执行来从我的数据库中检索数据.它只是用SELECT MemberOne分配userPermissionsOne FROM aspnet_Users WHERE MemberOne LIKE ' _ '.

很感谢任何形式的帮助.

userName = User.Identity.Name;  
userName = userName.ToUpper();  
selectedUserName = betDropDownList.SelectedValue;  
userPermissionsOne = "SELECT MemberOne FROM aspnet_Users WHERE MemberOne LIKE '___'";  
userPermissionsTwo = "SELECT MemberTwo FROM aspnet_Users WHERE MemberTwo LIKE '___'";  
userPermissionsThree = "SELECT MemberThree FROM aspnet_Users WHERE MemberThree LIKE '___'";  

if (string.Compare(userName, selectedUserName, true) == 0 || User.IsInRole("Administrator"))
{
    hinzufugenButton.Enabled = true;
    loschenButton.Enabled = true;
    bearbeitenButton.Enabled = true;
    betDropDownList.Enabled = true;
}
else if (userName == "ENL")
{
    if …
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sql asp.net

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