: C# source code, database applications, input determine the C# to determine whether the data exists, whether the duplication of data entry, a practical basis for example, when the user input, to determine whether the database exists the same record, specify the judgment duplicate entry in a field little improvement, can become judgment username and password procedures, open source C# source code download.

EstimateDataRepeat\EstimateDataRepeat\DataBase\db_09_Data.MDF
..................\..................\........\db_09_Log.LDF
..................\..................\EstimateDataRepeat\EstimateDataRepeat\EstimateDataRepeat.csproj
..................\..................\..................\..................\Form1.cs
..................\..................\..................\..................\Form1.Designer.cs
..................\..................\..................\..................\Form1.resx
..................\..................\..................\..................\Program.cs
..................\..................\..................\..................\...perties\AssemblyInfo.cs
..................\..................\..................\..................\..........\Resources.Designer.cs
..................\..................\..................\..................\..........\Resources.resx
..................\..................\..................\..................\..........\Settings.Designer.cs
..................\..................\..................\..................\..........\Settings.settings
..................\..................\..................\EstimateDataRepeat.sln
..................\..................\..................\EstimateDataRepeat.suo
..................\..................\..................\..................\Properties
..................\..................\..................\EstimateDataRepeat
..................\..................\DataBase
..................\..................\EstimateDataRepeat
..................\EstimateDataRepeat
EstimateDataRepeat

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