C# Exception User Handle

Does anybody knows about this? I'm having trouble in the code that has been given on me.

Server Error in '/' Application. Incorrect syntax near '1'. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Incorrect syntax near '1'.

Source Error:

Line 21:                 string checkuser = "select count(*) from 1Database where StudentName='" + txtStudentName.Text + "'";
Line 22:                 SqlCommand cmd = new SqlCommand(checkuser, conn);
Line 23:                 int temp = Convert.ToInt32(cmd.ExecuteScalar().ToString());
Line 24: 
Line 25:                 if (temp == 1)

Source File: C:\Users\orall\source\repos\DatabaseConnection\DatabaseConnection\loginpage.aspx.cs Line: 23

Stack Trace:

[SqlException (0x80131904): Incorrect syntax near '1'.] System.Data.SqlClient.SqlConnection.OnError(SqlException exception, Boolean breakConnection, Action1 wrapCloseInAction) +2582782 System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection, Action1 wrapCloseInAction) +6033430 System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj, Boolean callerHasConnectionLock, Boolean asyncClose) +297 System.Data.SqlClient.TdsParser.TryRun(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj, Boolean& dataReady) +4291 System.Data.SqlClient.SqlDataReader.TryConsumeMetaData() +59 System.Data.SqlClient.SqlDataReader.get_MetaData() +91 System.Data.SqlClient.SqlCommand.FinishExecuteReader(SqlDataReader ds, RunBehavior runBehavior, String resetOptionsString, Boolean isInternal, Boolean forDescribeParameterEncryption, Boolean shouldCacheForAlwaysEncrypted) +446 System.Data.SqlClient.SqlCommand.RunExecuteReaderTds(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, Boolean async, Int32 timeout, Task& task, Boolean asyncWrite, Boolean inRetry, SqlDataReader ds, Boolean describeParameterEncryptionRequest) +2698 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method, TaskCompletionSource`1 completion, Int32 timeout, Task& task, Boolean& usedCache, Boolean asyncWrite, Boolean inRetry) +1611 System.Data.SqlClient.SqlCommand.RunExecuteReader(CommandBehavior cmdBehavior, RunBehavior runBehavior, Boolean returnStream, String method) +65 System.Data.SqlClient.SqlCommand.ExecuteScalar() +283 DatabaseConnection.loginpage.Page_Load(Object sender, EventArgs e) in C:\Users\orall\source\repos\DatabaseConnection\DatabaseConnection\loginpage.aspx.cs:23 System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +52 System.Web.UI.Control.OnLoad(EventArgs e) +97 System.Web.UI.Control.LoadRecursive() +61 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +693