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[求助]
AE求距离函数返回值为0
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很简单的一个功能 代码如下 IFeatureLayer aFL = axMapControl1.Map.get_Layer(0) as IFeatureLayer; IFeatureLayer bFL = axMapControl1.Map.get_Layer(1) as IFeatureLayer; IFeatureClass aFClass = aFL.FeatureClass; IFeatureCursor aFC = aFClass.Search(null, true); IFeature aF = aFC.NextFeature(); int num = 0; while (aF!= null) { if (Convert.ToInt32(aF.get_Value(aF.Fields.FindField("price"  )) == 0){ textBox1.Text = "现在跑" + num + "个栅格"; textBox1.Refresh(); num++; aF = aFC.NextFeature(); continue; } else { IFeatureClass bFClass = bFL.FeatureClass; IQueryFilter bQF = new QueryFilterClass(); bQF.WhereClause = "类型 = " + "4"; IFeatureCursor bFC = bFClass.Search(bQF, true); IFeature bF = bFC.NextFeature(); double minDist = 99999.9; while (bF != null) { IIdentify aI = aFL as IIdentify; IArray aA = aI.Identify(bF.Shape); int idCount = 0; double featureMinDist = 99999.9; while (idCount < aA.Count) { IFeatureIdentifyObj aFIO = aA.get_Element(idCount) as IFeatureIdentifyObj; IRowIdentifyObject aRIO = aFIO as IRowIdentifyObject; IFeature aaF = aRIO.Row as IFeature; IGeometry aG = aF.Shape as IGeometry; IProximityOperator aPO = aG as IProximityOperator; double dist = aPO.ReturnDistance(aaF.Shape as IGeometry); if (dist < featureMinDist) { featureMinDist = dist; } idCount++; } if (featureMinDist < minDist) { minDist = featureMinDist; } bF = bFC.NextFeature(); } aF.set_Value(aF.Fields.FindField("ggdist" , minDist);aF.Store(); aF = aFC.NextFeature(); textBox1.Text = "现在跑" + num + "个栅格"; textBox1.Refresh(); num++; } } 运行的时候报错 报错成这样我也不知道怎么调试了 求大家懂的帮帮忙啊 奇怪的是 报错的时候dist变成了0.0 不知道为什么  报错.png |
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