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C# DataColumn.CompareValueTo方法代码示例

本文整理汇总了C#中System.Data.DataColumn.CompareValueTo方法的典型用法代码示例。如果您正苦于以下问题:C# DataColumn.CompareValueTo方法的具体用法?C# DataColumn.CompareValueTo怎么用?C# DataColumn.CompareValueTo使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在System.Data.DataColumn的用法示例。


在下文中一共展示了DataColumn.CompareValueTo方法的2个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: SilentlySetValue

        internal void SilentlySetValue(DataRow dr, DataColumn dc, DataRowVersion version, object newValue) {
            // get record for version
            int record = dr.GetRecordFromVersion(version);

            bool equalValues = false;
            if (DataStorage.IsTypeCustomType(dc.DataType) && newValue != dc[record]) {
                // if UDT storage, need to check if reference changed. See bug 385182
                equalValues = false;
            }
            else {
                equalValues = dc.CompareValueTo(record, newValue, true);
            }

            // if expression has changed
            if (!equalValues) {
                int[] oldIndex = dr.Table.RemoveRecordFromIndexes(dr, version);// conditional, if it exists it will try to remove with no event fired
                dc.SetValue(record, newValue);
                int[] newIndex = dr.Table.InsertRecordToIndexes(dr, version);// conditional, it will insert if it qualifies, no event will be fired
                if (dr.HasVersion(version)) {
                    if (version != DataRowVersion.Original) {
                        dr.Table.RecordChanged(oldIndex, newIndex);
                    }
                    if (dc.dependentColumns != null) {
                        //BugBug - passing in null for cachedRows.  This means expression columns as keys does not work when key changes.
                        dc.Table.EvaluateDependentExpressions(dc.dependentColumns, dr, version, null);
                    }
                }
             }
             dr.ResetLastChangedColumn();
        }
开发者ID:nlh774,项目名称:DotNetReferenceSource,代码行数:30,代码来源:DataTable.cs

示例2: SilentlySetValue

 internal void SilentlySetValue(DataRow dr, DataColumn dc, DataRowVersion version, object newValue)
 {
     int recordFromVersion = dr.GetRecordFromVersion(version);
     bool flag = false;
     if (DataStorage.IsTypeCustomType(dc.DataType) && (newValue != dc[recordFromVersion]))
     {
         flag = false;
     }
     else
     {
         flag = dc.CompareValueTo(recordFromVersion, newValue, true);
     }
     if (!flag)
     {
         int[] oldIndex = dr.Table.RemoveRecordFromIndexes(dr, version);
         dc.SetValue(recordFromVersion, newValue);
         int[] newIndex = dr.Table.InsertRecordToIndexes(dr, version);
         if (dr.HasVersion(version))
         {
             if (version != DataRowVersion.Original)
             {
                 dr.Table.RecordChanged(oldIndex, newIndex);
             }
             if (dc.dependentColumns != null)
             {
                 dc.Table.EvaluateDependentExpressions(dc.dependentColumns, dr, version, null);
             }
         }
     }
     dr.ResetLastChangedColumn();
 }
开发者ID:pritesh-mandowara-sp,项目名称:DecompliedDotNetLibraries,代码行数:31,代码来源:DataTable.cs


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