c# - C# SMO-检查表是否已存在于目标服务器

Question

我已经编写了一个 C# 代码来使用 SMO 在两个远程服务器之间传输表，我想知道的是无论如何检查表是否已经存在于目标服务器中，具有确切的架构、列名、数据类型、约束和一切。这样我就不必每次都删除现有表并创建新表。

Answer 1

试试这段代码片段：

Server srv1 = new Server("<server_location>");
srv1.ConnectionContext.LoginSecure = false;
srv1.ConnectionContext.Login = "<username>";
srv1.ConnectionContext.Password = "<password>";
srv1.ConnectionContext.Connect();
Database sourceDb = srv1.Databases["<database_name>"];
Table sourceTbl = sourceDb.Tables["<table_name>"];

Server srv2 = new Server("<server_location>");
srv2.ConnectionContext.LoginSecure = false;
srv2.ConnectionContext.Login = "<username>";
srv2.ConnectionContext.Password = "<password>";
srv2.ConnectionContext.Connect();
Database destinationDb = srv1.Databases["<database name>"];
Table destinationTbl = sourceDb.Tables["<table_name>"];

var isMatched = CompareTables(sourceTbl, destinationTbl);    

比较方法：

bool CompareTables(Table source, Table destination)
{
    // Column count doesn't match
    if (!source.Columns.Count.Equals(destination.Columns.Count))
        return false;

    // Assuming the order of the Columns are same in both the Tables
    for (int i = 0; i < source.Columns.Count; i++)
        if (!source.Columns[i].Equals(destination.Columns[i]))
            return false;

    // Constraints count doesn't match
    if (!source.Checks.Count.Equals(destination.Checks.Count))
        return false;

    // Assuming the order of the Contraints are same in both the Tables
    for (int i = 0; i < source.Checks.Count; i++)
        if (!source.Checks[i].Equals(destination.Checks[i]))
            return false;

    return true;
}