我想使用 C# 中的数据表来获取表中任何列的最大大小。例如,如果我在数据库中有一个名为 dept 的表,它的属性是 NAME 和 ADDRESS,并且我将 NAME 的大小设置为 varchar(50),将地址设置为 varchar(30)。
现在我想得到50和30.....
我写了这段代码
DataSet ds1 = new DataSet();
DataSet ds = new DataSet();
string query = Form1.query1Pass;
SqlCommand cmd = new SqlCommand(query.ToString(), con);
this.tablename1 = query.Substring(query.LastIndexOf("from")+4); ;
cmd.ExecuteNonQuery();
SqlDataAdapter adp = new SqlDataAdapter(cmd);
adp.Fill(this.ds);
string query2 = Form1.query2Pass;
cmd = new SqlCommand(query2, con);
adp = new SqlDataAdapter(cmd);
adp.Fill(this.ds1);
StringBuilder datatype2 = new StringBuilder();
this.datatype2.Append("Data Type Conflict: ");
this.datetimeCon.Append("DateTime Format Conflict: ");
DataTable table1 = this.ds.Tables[0];
DataTable table2 = this.ds1.Tables[0]; ;
DataColumnCollection col1 = table1.Columns;
DataColumnCollection col2 = table2.Columns;
foreach (DataColumn ds in col1) {
foreach (DataColumn ds2 in col2) {
if (ds.ColumnName.Equals(ds2.ColumnName)) {
if (!ds.DataType.Equals(ds2.DataType)) {
this.datatype2.Append(ds.ColumnName + "<" + ds.DataType + ">, " + ds2.ColumnName + "<" + ds2.DataType + ">,");
}
else
if (ds.MaxLength!=ds2.MaxLength) {
maxLength.Append(ds.ColumnName+"<"+ds.MaxLength+">, "+ds2.ColumnName+"<"+ds2.MaxLength+">,");
}
}
}
}