can also be null, see Nullable<t> (msdn). If you know what the null state wants to imply, you easily can use the ?? - null-coalescing operator (msdn) to convert your bool? to ...
cannot implicitly convert type 'bool?' to 'bool'. An explicit conversion exists (are you missing a cast?) As the others statedbool?is not equal tobool.bool?can also benull, seeNullable<t>(msdn). If you know what thenullstate wants to imply, you easily can use the ?? - null-coales...
cannot implicitly convert type 'string' to 'bool' Cannot implicitly convert type 'string' to 'byte[]' cannot implicitly convert type 'system.data.datatable' to 'system.data.datarow ' Cannot implicitly convert type 'System.Exception' to 'string' Cannot implicitly convert type 'void' to 'object...
protected void btnLogin_Click(object sender, EventArgs e) { int i = 0; try { List<string> mode = new List<string>(); if (Cashpay.Checked) { mode.Add(Cashpay.Text); } if (Cardpay.Checked) { mode.Add(Cardpay.Text); } string payment = string.Join(", ", mode); string start...
Cannot implicitly convert type 'string' to 'bool' the id attribute on the items table is of varchar(50) type. and the text box too is of string type. so why does it says conversion between boolean and string problem? thank you all. ...
英文的意思是不能从常布尔型转换为整型指针，这种错误一般是等号左右两边类型不一致导致的。
double shirtPriceDisBool=shirtPriceDis<100;这里左边变量是double. 右边式子类型是boolean 所以type mismatch
int move(int *pointer); //改为： int move(int (*pointer)[3]); //这个程序也要作相应的改变才可以的。
就是因为'bool'类型的不能赋值给'<int>*'
看起来像是参数类型不符合const btCollisionObject* 和const btCollisionObjectWrapper