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SQLServer数据库:获取列标题(字段名)

2016-05-16 14:47 302 查看
写数据库之前最好先查看数据库字段名是否存在,否则很容易出现写数据库失败。

SqlConnection ^SqlServer_con;			//SqlServer

Form1(void)
{
InitializeComponent();
//
//TODO: 在此处添加构造函数代码
//

this->SqlServer_con = gcnew SqlConnection();
//this->SqlServer_con->ConnectionString = "server=(local);database=temp;uid=sa;pwd=!QAZ@WSX#EDC";
this->SqlServer_con->ConnectionString = "server=(local);database=test;uid=sa;pwd=123456";
try
{
this->SqlServer_con->Open();
}
catch (System::Exception^ e)
{
System::Windows::Forms::MessageBox::Show("链接数据库失败!", "错误", System::Windows::Forms::MessageBoxButtons::OK,
System::Windows::Forms::MessageBoxIcon::Error);
return;
}

SqlCommand ^SqlServer_cmd;			//SqlServer
SqlDataReader ^reader;

try
{
SqlServer_cmd = gcnew SqlCommand("SELECT TOP 1 * FROM [sl651_2014]", this->SqlServer_con);			//SqlServer
reader = SqlServer_cmd->ExecuteReader();
for (int i = 0; i < reader->FieldCount;i ++)
{
this->textBox1->Text += ""+(i+1)+"\t"+reader->GetName(i)->ToString()+"\r\n";
}
}
catch (System::Exception^ e)
{

}

reader->Close();
this->SqlServer_con->Close();
}

使用 reader->GetName(i)即可获取到指定列的字段名称

reader->FieldCount即为列数量

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标签:  .NET VC++ 数据库